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Bai Y, Miao C, Wang H, Wu Z. IrSn Bimetallic Clusters Confined in MFI Zeolites for CO Selective Catalytic Reduction of NO x in the Presence of Excess O 2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:11812-11821. [PMID: 38897924 DOI: 10.1021/acs.est.4c02540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
We developed a simple strategy for preparing IrSn bimetallic clusters encapsulated in pure silicon zeolites via a one-pot hydrothermal synthesis by using diethylamine as a stabilizing agent. A series of investigations verified that metal species have been confined successfully in the inner of MFI zeolites. IrSn bimetallic cluster catalysts were efficient for the CO selective catalytic reduction of NOx in the presence of excess O2. Furthermore, the 13CO temperature-programmed surface reaction results demonstrated that NO2 and N2O could form when most of the CO was transformed into CO2 and that Sn modification could passivate CO oxidation on the IrSn bimetallic clusters, leading to more reductants that could be used for NOx reduction at high temperatures. Furthermore, SO2 can also influence the NOx conversion by inhibiting the oxidation of CO. This study provides a new strategy for preparing efficient environmental catalysts with a high dispersion of metal species.
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Affiliation(s)
- Yarong Bai
- Key laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
| | - Chuhan Miao
- Key laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
| | - Haiqiang Wang
- Key laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
| | - Zhongbiao Wu
- Key laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
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2
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Jeon JH, Lim HR, Park JY, Choa YH. Iridium oxide-based non-enzymatic glucose sensor: Superior electro-catalytic performance in biological environmental media. ENVIRONMENTAL RESEARCH 2024; 252:118772. [PMID: 38604481 DOI: 10.1016/j.envres.2024.118772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 03/18/2024] [Accepted: 03/20/2024] [Indexed: 04/13/2024]
Abstract
Nanostructured inorganic materials have potential advantages as glucose-sensing elements in diabetes care, thereby circumventing the need for expensive enzymatic agents. However, many nonenzymatic sensors face challenges related to selectivity and reliability, reducing their efficacy in body fluids. In this study, we introduce an Iridium oxide (IrO2)-based non-enzymatic glucose sensor. This sensor demonstrates exceptional electro-catalytic properties in human serum, characterized by high sensitivity (638 μA μM-1cm2) and a consistent recovery rate (∼104%) across 15 cycles in saline. Furthermore, its impressive performance in human serum, as evidenced by a low relative standard deviation (RSD <1.57%), underscores its applicability in biological matrices such as interstitial fluids. Overall, the IrO2 sensor is a promising, highly reversible, economical, and simple method for detecting glucose in continuous monitoring systems.
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Affiliation(s)
- Ji Hwan Jeon
- Department of Material Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Hyo-Ryoung Lim
- Major of Human Biocovergence, Division of Smart Healthcare, Pukyong National University, Busan, 48513, South Korea
| | - Ji Young Park
- Department of Material Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea.
| | - Yong-Ho Choa
- Department of Material Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea.
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3
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Chen LJ, Yu TC, Huang BH, Tso KC, Song YF, Yin GC, Yang JS, Wu PW. Synthesis of novel chitosan/sodium hyaluronate/iridium hydrogel nanocomposite for wound healing application. Int J Biol Macromol 2024; 270:132351. [PMID: 38754679 DOI: 10.1016/j.ijbiomac.2024.132351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 04/29/2024] [Accepted: 05/11/2024] [Indexed: 05/18/2024]
Abstract
A novel chitosan/sodium hyaluronate/iridium (CHI/SH/Ir) hydrogel nanocomposite with a unique microstructure containing vertically aligned pores is fabricated via an electrophoresis technique. The formation of orderly vertical pores in CHI/SH/Ir hydrogel nanocomposite is due to the confinement of hydrogen bubbles produced from the water electrolysis during electrophoresis that limits their lateral movement and coalescence. In a wet state, the diameter for the vertical pores is 600-700 μm. With a thickness of 500 μm, the CHI/SH/Ir hydrogel nanocomposite exhibits a porosity of 76.7 % and a water uptake of 350 %. Its tensile strength is almost doubled to 8.7 MPa, as compared to that of counterpart without the addition of iridium. In CHI/SH/Ir hydrogel nanocomposite, the iridium nanoparticles are homogeneously distributed with an average size of 3 nm. The CHI/SH/Ir electrophoresis suspension exhibits a negligible cytotoxicity. In cell migration test using the human keratinocytes HaCaT cells, the CHI/SH/Ir hydrogel nanocomposite reveals a relative migration of 122.15 ± 9.02 % (p < 0.001) as compared to the blank sample. The presence of vertically aligned pores with the use of SH and iridium nanoparticles indicates a promising opportunity in wound healing application.
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Affiliation(s)
- Li-Jie Chen
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Tsung-Chun Yu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Bo-Han Huang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Kuang-Chih Tso
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Nara 630-0192, Japan
| | - Yen-Fang Song
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - Gung-Chian Yin
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - Jai-Sing Yang
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan.
| | - Pu-Wei Wu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.
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Liu S, Huang WH, Meng S, Jiang K, Han J, Zhang Q, Hu Z, Pao CW, Geng H, Huang X, Zhan C, Yun Q, Xu Y, Huang X. 3D Noble-Metal Nanostructures Approaching Atomic Efficiency and Atomic Density Limits. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2312140. [PMID: 38241656 DOI: 10.1002/adma.202312140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/10/2023] [Indexed: 01/21/2024]
Abstract
Noble metals have been widely used in catalysis, however, the scarcity and high cost of noble metal motivate researchers to balance the atomic efficiency and atomic density, which is formidably challenging. This article proposes a robust strategy for fabricating 3D amorphous noble metal-based oxides with simultaneous enhancement on atomic efficiency and density with the assistance of atomic channels, where the atomic utilization increases from 18.2% to 59.4%. The unique properties of amorphous bimetallic oxides and formation of atomic channels have been evidenced by detailed experimental characterizations and theoretical simulations. Moreover, the universality of the current strategy is validated by other binary oxides. When Cu2IrOx with atomic channels (Cu2IrOx-AE) is used as catalyst for oxygen evolution reaction (OER), the mass activity and turnover frequency value of Cu2IrOx-AE are 1-2 orders of magnitude higher than CuO/IrO2 and Cu2IrOx without atomic channels, largely outperforming the reported OER catalysts. Theoretical calculations reveal that the formation of atomic channels leads to various Ir sites, on which the proton of adsorbed *OH can transfer to adjacent O atoms of [IrO6]. This work may attract immediate interest of researchers in material science, chemistry, catalysis, and beyond.
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Affiliation(s)
- Shangheng Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Lab Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), 398 Ruoshui Road, Suzhou, 215123, China
| | - Wei-Hsiang Huang
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan
| | - Shuang Meng
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Kezhu Jiang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Jiajia Han
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Qiaobao Zhang
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, China
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of Solids, Nothnitzer Strasse 40, 01187, Dresden, Germany
| | - Chih-Wen Pao
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan
| | - Hongbo Geng
- School of Materials Engineering Changshu Institute of Technology Changshu, Changshu, 215500, China
| | - Xuan Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Changhong Zhan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Qinbai Yun
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, Kowloon, 999077, China
| | - Yong Xu
- Lab Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), 398 Ruoshui Road, Suzhou, 215123, China
| | - Xiaoqing Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, 361005, China
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Liu L, Huang T, Yang X, Liu S, Wang S, Xiang L, Wang G, Kuai L. Microdrop-confined synthesis and regulation of porous hollow Ir-based catalysts for the mass transfer-enhanced electrolysis of pure water. Sci Bull (Beijing) 2024; 69:1081-1090. [PMID: 38395652 DOI: 10.1016/j.scib.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 10/26/2023] [Accepted: 01/24/2024] [Indexed: 02/25/2024]
Abstract
Maximally exploiting the active sites of iridium catalysts is essential for building low-cost proton exchange membrane (PEM) electrolyzers for green H2 production. Herein, we report a novel microdrop-confined fusion/blasting (MCFB) strategy for fabricating porous hollow IrO1-x microspheres (IrO1-x-PHM) by introducing explosive gas mediators from a NaNO3/glucose mixture. Moreover, the developed MCFB strategy is demonstrated to be general for synthesizing a series of Ir-based composites, including Ir-Cu, Ir-Ru, Ir-Pt, Ir-Rh, Ir-Pd, and Ir-Cu-Pd and other noble metals such as Rh, Ru, and Pt. The hollow structures can be regulated using different organics with NaNO3. The assembled PEM electrolyzer with IrO1-x-PHM as the anode catalyst (0.5 mg/cm2) displays an impressive polarization voltage of 1.593 and 1.726 V at current densities of 1 and 2A/cm2, respectively, outperforming commercial IrOx catalysts and most of the ever-reported iridium catalysts with such low catalyst loading. More importantly, the breakdown of the polarization loss indicates that the improved performance is due to the facilitated mass transport induced by the hollowness. This study offers a versatile platform for fabricating efficient Ir-based catalysts for PEM electrolyzers and beyond.
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Affiliation(s)
- Li Liu
- School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Wuhu 241000, China
| | - Ting Huang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Xiaoliang Yang
- School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Wuhu 241000, China
| | - Shoujie Liu
- School of Materials Science and Engineering, Anhui University, Hefei 230601, China
| | - Shunsheng Wang
- School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Wuhu 241000, China
| | - Linlin Xiang
- School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Wuhu 241000, China
| | - Gongming Wang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
| | - Long Kuai
- School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Wuhu 241000, China; Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, China.
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6
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Wang H, Chen ZN, Wang Y, Wu D, Cao M, Sun F, Cao R. Sub-10-nm-sized Au@Au xIr 1-x metal-core/alloy-shell nanoparticles as highly durable catalysts for acidic water splitting. Natl Sci Rev 2024; 11:nwae056. [PMID: 38444985 PMCID: PMC10914371 DOI: 10.1093/nsr/nwae056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/15/2023] [Accepted: 01/12/2024] [Indexed: 03/07/2024] Open
Abstract
The absence of efficient and durable catalysts for oxygen evolution reaction (OER) is the main obstacle to hydrogen production through water splitting in an acidic electrolyte. Here, we report a controllable synthesis method of surface IrOx with changing Au/Ir compositions by constructing a range of sub-10-nm-sized core-shell nanocatalysts composed of an Au core and AuxIr1-x alloy shell. In particular, Au@Au0.43Ir0.57 exhibits 4.5 times higher intrinsic OER activity than that of the commercial Ir/C. Synchrotron X-ray-based spectroscopies, electron microscopy and density functional theory calculations revealed a balanced binding of reaction intermediates with enhanced activity. The water-splitting cell using a load of 0.02 mgIr/cm2 of Au@Au0.43Ir0.57 as both anode and cathode can reach 10 mA/cm2 at 1.52 V and maintain activity for at least 194 h, which is better than the cell using the commercial couple Ir/C‖Pt/C (1.63 V, 0.2 h).
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Affiliation(s)
- Huimin Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhe-ning Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Yuanyuan Wang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Dongshuang Wu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Minna Cao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fanfei Sun
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Rong Cao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China
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7
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Yang Y, Zhou T, Zeng Z, Hu Y, Yang F, Sun W, He L. Novel sulfate solid supported binary Ru-Ir oxides for superior electrocatalytic activity towards OER and CER. J Colloid Interface Sci 2024; 659:191-202. [PMID: 38176229 DOI: 10.1016/j.jcis.2023.12.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/23/2023] [Accepted: 12/29/2023] [Indexed: 01/06/2024]
Abstract
Electrolysis for producing hydrogen powered by renewable electricity can be dramatically expanded by adapting different electrolytes (brine, seawater or pure water), which means the anode materials must stand up to complex electrolyte conditions. Here, a novel catalyst/support hybrid of binary Ru3.5Ir1Ox supported by barium strontium sulfate (BaSrSO4) was synthesized (RuIrOx/BSS) by exchanging the anion ligands of support. The as-synthesized RuIrOx/BSS exhibits compelling oxygen evolution (OER) and chlorine evolution (CER) performances, which affords to 10 mA cm-2 with only overpotential of 244 mV and 38 mV, respectively. The performed X-ray adsorption spectra clearly indicate the presence of an interface charge transfer effect, which results in the assignment of more electrons to the d orbitals of the Ru and Ir sites. The theoretical calculations demonstrated that the electronic structures of the catalytic active sites were modulated to give a lower overpotential, confirming the intrinsically high OER and CER catalytic activity.
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Affiliation(s)
- Yifei Yang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Road, Haikou 570228, PR China
| | - Tingxi Zhou
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Road, Haikou 570228, PR China
| | - Zhen Zeng
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Road, Haikou 570228, PR China
| | - Yuling Hu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Road, Haikou 570228, PR China
| | - Fei Yang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Road, Haikou 570228, PR China
| | - Wei Sun
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Road, Haikou 570228, PR China.
| | - Leilei He
- Zhejiang Provincial Key Laboratory of Water Science and Technology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang 314006, PR China.
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Li Y, Yu G, Li J, Bian Z, Han X, Wu B, Wu G, Yang Q, Hong X. Universal Synthesis of Amorphous Metal Oxide Nanomeshes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401162. [PMID: 38511537 DOI: 10.1002/smll.202401162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 03/11/2024] [Indexed: 03/22/2024]
Abstract
Constructing the pore structures in amorphous metal oxide nanosheets can enhance their electrocatalytic performance by efficiently increasing specific surface areas and facilitating mass transport in electrocatalysis. However, the accurate synthesis for porous amorphous metal oxide nanosheets remains a challenge. Herein, a facile nitrate-assisted oxidation strategy is reported for synthesizing amorphous mesoporous iridium oxide nanomeshes (a-m IrOx NMs) with a pore size of ∼4 nm. X-ray absorption characterizations indicate that a-m IrOx NMs possess stretched Ir─O bonds and weaker Ir-O interaction compared with commercial IrO2. Combining thermogravimetric-fourier transform infrared spectroscopy with differential scanning calorimetry measurements, it is demonstrated that sodium nitrate, acting as an oxidizing agent, is conducive to the formation of amorphous nanosheets, while the NO2 produced by the in situ decomposition of nitrates facilitates the generation of pores within the nanomeshes. As an anode electrocatalyst in proton exchange membrane water electrolyzer, a-m IrOx NMs exhibit superior performance, maintaining a cell voltage of 1.67 V at 1 A cm-2 for 120 h without obvious decay with a low loading (0.4 mgcatalyst cm-2). Furthermore, the nitrate-assisted method is demonstrated to be a general approach to prepare various amorphous metal oxide nanomeshes, including amorphous RhOx, TiOx, ZrOx, AlOx, and HfOx nanomeshes.
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Affiliation(s)
- Youle Li
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
- Department of Chemistry, Laboratory of Nanomaterials for Energy Conversion (LNEC), University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Ge Yu
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Junmin Li
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zenan Bian
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xiao Han
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Bei Wu
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Geng Wu
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Qing Yang
- Department of Chemistry, Laboratory of Nanomaterials for Energy Conversion (LNEC), University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xun Hong
- Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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9
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Wang J, Zhao L, Zou Y, Dai J, Zheng Q, Zou X, Hu L, Hou W, Wang R, Wang K, Shi Y, Zhan G, Yao Y, Zhang L. Engineering the Coordination Environment of Ir Single Atoms with Surface Titanium Oxide Amorphization for Superior Chlorine Evolution Reaction. J Am Chem Soc 2024. [PMID: 38498303 DOI: 10.1021/jacs.3c13834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
The chlorine evolution reaction (CER) is essential for industrial Cl2 production but strongly relies on the use of dimensionally stable anode (DSA) with high-amount precious Ru/Ir oxide on a Ti substrate. For the purpose of sustainable development, precious metal decrement and performance improvement are highly desirable for the development of CER anodes. Herein, we demonstrate that surface titanium oxide amorphization is crucial to regulate the coordination environment of stabilized Ir single atoms for efficient and durable chlorine evolution of Ti monolithic anodes. Experimental and theoretical results revealed the formation of four-coordinated Ir1O4 and six-coordinated Ir1O6 sites on amorphous and crystalline titanium oxides, respectively. Interestingly, the Ir1O4 sites exhibited a superior CER performance, with a mass activity about 10 and 500 times those of the Ir1O6 counterpart and DSA, respectively. Moreover, the Ir1O4 anode displayed excellent durability for 200 h, far longer than that of its Ir1O6 counterpart (2 h). Mechanism studies showed that the unsaturated Ir in Ir1O4 was the active center for chlorine evolution, which was changed to the top-coordinated O in Ir1O6. This change of active sites greatly affected the adsorption energy of Cl species, thus accounting for their different CER activity. More importantly, the amorphous structure and restrained water dissociation of Ir1O4 synergistically prevent oxygen permeation across the Ti substrate, contributing to its long-term CER stability. This study sheds light on the importance of single-atom coordination structures in the reactivity of catalysts and offers a facile strategy to prepare highly active single-atom CER anodes via surface titanium oxide amorphization.
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Affiliation(s)
- Jiaxian Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Long Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yunjie Zou
- State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Jie Dai
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Qian Zheng
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xingyue Zou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Lufa Hu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Wei Hou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Ruizhao Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Kaiyuan Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yanbiao Shi
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Guangming Zhan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yancai Yao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Lizhi Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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10
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Mingoes CJ, Schroeder BC, Jorge Sobrido AB. Electron Spin Selective Iridium Electrocatalysts for the Oxygen Evolution Reaction. ACS MATERIALS AU 2024; 4:204-213. [PMID: 38496043 PMCID: PMC10941284 DOI: 10.1021/acsmaterialsau.3c00084] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/17/2023] [Accepted: 11/17/2023] [Indexed: 03/19/2024]
Abstract
Highly efficient electrocatalysts for water electrolysis are crucial to the widespread commercialization of the technology and an important step forward toward a sustainable energy future. In this study, an alternative method for boosting the electrocatalytic activity toward the oxygen evolution reaction (OER) of a well-known electrocatalyst (iridium) is presented. Iridium nanoparticles (2.1 ± 0.2 nm in diameter) functionalized with chiral molecules were found to markedly enhance the activity of the OER when compared to unfunctionalized and achiral functionalized iridium nanoparticles. At a potential of 1.55 V vs Reference Hydrogen Electrode (RHE), chiral functionalized iridium nanoparticles exhibited an average 85% enhancement in activity with respect to unfunctionalized iridium nanoparticles compared to an average 13% enhancement for the achiral functionalized iridium nanoparticle. This activity enhancement is attributed to a spin-selective electron transfer mechanism taking place on the chiral functionalized catalysts, a characteristic induced by the chirality of the ligand. This alternative path for the OER drastically reduces the production of hydrogen peroxide, which was confirmed via a colorimetric method.
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Affiliation(s)
- Carlos J. Mingoes
- School
of Engineering and Materials Science, Queen
Mary University of London, Mile End Road, London E1 4NS, U.K.
| | - Bob C. Schroeder
- Chemistry
Department, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Ana B. Jorge Sobrido
- School
of Engineering and Materials Science, Queen
Mary University of London, Mile End Road, London E1 4NS, U.K.
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11
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Duan X, Sha Q, Li P, Li T, Yang G, Liu W, Yu E, Zhou D, Fang J, Chen W, Chen Y, Zheng L, Liao J, Wang Z, Li Y, Yang H, Zhang G, Zhuang Z, Hung SF, Jing C, Luo J, Bai L, Dong J, Xiao H, Liu W, Kuang Y, Liu B, Sun X. Dynamic chloride ion adsorption on single iridium atom boosts seawater oxidation catalysis. Nat Commun 2024; 15:1973. [PMID: 38438342 PMCID: PMC10912682 DOI: 10.1038/s41467-024-46140-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 02/15/2024] [Indexed: 03/06/2024] Open
Abstract
Seawater electrolysis offers a renewable, scalable, and economic means for green hydrogen production. However, anode corrosion by Cl- pose great challenges for its commercialization. Herein, different from conventional catalysts designed to repel Cl- adsorption, we develop an atomic Ir catalyst on cobalt iron layered double hydroxide (Ir/CoFe-LDH) to tailor Cl- adsorption and modulate the electronic structure of the Ir active center, thereby establishing a unique Ir-OH/Cl coordination for alkaline seawater electrolysis. Operando characterizations and theoretical calculations unveil the pivotal role of this coordination state to lower OER activation energy by a factor of 1.93. The Ir/CoFe-LDH exhibits a remarkable oxygen evolution reaction activity (202 mV overpotential and TOF = 7.46 O2 s-1) in 6 M NaOH+2.8 M NaCl, superior over Cl--free 6 M NaOH electrolyte (236 mV overpotential and TOF = 1.05 O2 s-1), with 100% catalytic selectivity and stability at high current densities (400-800 mA cm-2) for more than 1,000 h.
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Affiliation(s)
- Xinxuan Duan
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637459, Singapore
| | - Qihao Sha
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Pengsong Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, PR China
| | - Tianshui Li
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Guotao Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Wei Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Ende Yu
- Ocean Hydrogen Energy R&D Center, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, PR China
| | - Daojin Zhou
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Jinjie Fang
- State Key Lab of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, 100029, Beijing, PR China
| | - Wenxing Chen
- Energy & Catalysis Center, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Yizhen Chen
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, PR China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, PR China
| | - Jiangwen Liao
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, PR China
| | - Zeyu Wang
- Department of Chemistry, Tsinghua University, 100084, Beijing, PR China
| | - Yaping Li
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Hongbin Yang
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, 999077, PR China
| | - Guoxin Zhang
- College of Energy, Shandong University of Science and Technology, Tsingtao, 266590, PR China
| | - Zhongbin Zhuang
- State Key Lab of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, 100029, Beijing, PR China
- Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, 100029, Beijing, PR China
| | - Sung-Fu Hung
- Department of Applied Chemistry and Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan
| | - Changfei Jing
- School of Materials Science and Engineering, Tianjin Key Lab of Photoelectric Materials & Devices, Tianjin University of Technology, Tianjin, 300384, PR China
| | - Jun Luo
- ShenSi Lab, Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518110, PR China
| | - Lu Bai
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, 100190, Beijing, PR China
| | - Juncai Dong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, PR China
| | - Hai Xiao
- Department of Chemistry, Tsinghua University, 100084, Beijing, PR China
| | - Wen Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Yun Kuang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China.
- Ocean Hydrogen Energy R&D Center, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, PR China.
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, 999077, PR China.
- Department of Chemistry & Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR, 999077, PR China.
| | - Xiaoming Sun
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China.
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12
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Chandrappa S, Myakala SN, Koshi NA, Galbao SJ, Lee SC, Bhattacharjee S, Eder D, Cherevan A, Murthy DHK. Unveiling Valence State-Dependent Photocatalytic Water Splitting Activity and Photocathodic Behavior in Visible Light-Active Iridium-Doped BaTiO 3. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8763-8771. [PMID: 38327063 PMCID: PMC10895576 DOI: 10.1021/acsami.3c16710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Despite having favorable energetics and tunable optoelectronic properties, utilization of BaTiO3 (BTO) for photocatalytic reactions is limited by its absorption only in the ultraviolet region. To address this challenge, BTO is doped with iridium (Ir) to induce visible light absorption. The visible light-induced photocatalytic H2 generation efficiency is enhanced by 2 orders of magnitude on selective conversion of the Ir valence state from Ir4+ to Ir3+. To understand such intriguing behavior, valence state-dependent changes in the optoelectronic, structural, and surface properties and electronic band structure are comprehensively investigated. The effect of electron occupancy change between Ir4+ (t2g5 eg0) and Ir3+ (t2g6 eg0) and their energetic positions within the band gap is found to significantly influence H2 generation. Besides this, converting Ir4+ to Ir3+ enhanced the photocathodic current and lowered the onset potential. Results aid in designing photocatalysts to efficiently use low-energy photons for enhancing solar H2 production in these emerging BTO-based photocatalysts. Collectively, the observations made in this work highlight the promising application of Ir3+:BTO in z-scheme photocatalysis.
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Affiliation(s)
- Sujana Chandrappa
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | | | - Namitha Anna Koshi
- Indo-Korea Science and Technology Center (IKST), Korea Institute of Science and Technology, Bengaluru 560064, India
| | - Simon Joyson Galbao
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Seung-Cheol Lee
- Indo-Korea Science and Technology Center (IKST), Korea Institute of Science and Technology, Bengaluru 560064, India
| | - Satadeep Bhattacharjee
- Indo-Korea Science and Technology Center (IKST), Korea Institute of Science and Technology, Bengaluru 560064, India
| | - Dominik Eder
- TU Wien, Institute of Materials Chemistry, Getreidemarkt 9/BC/02, 1040 Vienna, Austria
| | - Alexey Cherevan
- TU Wien, Institute of Materials Chemistry, Getreidemarkt 9/BC/02, 1040 Vienna, Austria
| | - Dharmapura H K Murthy
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
- Center for Renewable Energy, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
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13
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Guo H, Shi J, Li L, Han X, Shang C, Luo H, Cao X, Tao L, Tan H, Gu Y, Qian Z, Zhang W, Luo M, Zhao X, Guo S. Carbon-Extraction-Induced Biaxial Strain Tuning of Carbon-Intercalated Iridium Metallene for Hydrogen Evolution Catalysis. NANO LETTERS 2024; 24:1602-1610. [PMID: 38286023 DOI: 10.1021/acs.nanolett.3c04236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Metallene materials with atomic thicknesses are receiving increasing attention in electrocatalysis due to ultrahigh surface areas and distinctive surface strain. However, the continuous strain regulation of metallene remains a grand challenge. Herein, taking advantage of autocatalytic reduction of Cu2+ on biaxially strained, carbon-intercalated Ir metallene, we achieve control over the carbon extraction kinetics, enabling fine regulation of carbon intercalation concentration and continuous tuning of (111) in-plane (-2.0%-2.6%) and interplanar (3.5%-8.8%) strains over unprecedentedly wide ranges. Electrocatalysis measurements reveal the strain-dependent activity toward hydrogen evolution reaction (HER), where weakly strained Ir metallene (w-Ir metallene) with the smallest lattice constant presents the highest mass activity of 2.89 A mg-1Ir at -0.02 V vs reversible hydrogen electrode (RHE). Theoretical calculations validated the pivotal role of lattice compression in optimizing H binding on carbon-intercalated Ir metallene surfaces by downshifting the d-band center, further highlighting the significance of strain engineering for boosted electrocatalysis.
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Affiliation(s)
- Hongyu Guo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Jia Shi
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Lu Li
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Xiaocang Han
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Changshuai Shang
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Heng Luo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Xiaoqing Cao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Lu Tao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Hao Tan
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Yu Gu
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Zhengyi Qian
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Wenyu Zhang
- Luminar Technologies Inc., Orlando, Florida 32826, United States
| | - Mingchuan Luo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Xiaoxu Zhao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing 100871, China
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14
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Marsh P, Huang MH, Xia X, Tran I, Atanassov P, Cao H. Polarization Conforms Performance Variability in Amorphous Electrodeposited Iridium Oxide pH Sensors: A Thorough Surface Chemistry Investigation. SENSORS (BASEL, SWITZERLAND) 2024; 24:962. [PMID: 38339679 PMCID: PMC10856937 DOI: 10.3390/s24030962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/24/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024]
Abstract
Electrodeposited amorphous hydrated iridium oxide (IrOx) is a promising material for pH sensing due to its high sensitivity and the ease of fabrication. However, durability and variability continue to restrict the sensor's effectiveness. Variation in probe films can be seen in both performance and fabrication, but it has been found that performance variation can be controlled with potentiostatic conditioning (PC). To make proper use of this technique, the morphological and chemical changes affecting the conditioning process must be understood. Here, a thorough study of this material, after undergoing PC in a pH-sensing-relevant potential regime, was conducted by voltammetry, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Fitting of XPS data was performed, guided by raw trends in survey scans, core orbitals, and valence spectra, both XPS and UPS. The findings indicate that the PC process can repeatably control and conform performance and surface bonding to desired calibrations and distributions, respectively; PC was able to reduce sensitivity and offset ranges to as low as ±0.7 mV/pH and ±0.008 V, respectively, and repeat bonding distributions over ~2 months of sample preparation. Both Ir/O atomic ratios (shifting from 4:1 to over 4.5:1) and fitted components assigned hydroxide or oxide states based on the literature (low-voltage spectra being almost entirely with suggested hydroxide components, and high-voltage spectra almost entirely with suggested oxide components) trend across the polarization range. Self-consistent valence, core orbital, and survey quantitative trends point to a likely mechanism of ligand conversion from hydroxide to oxide, suggesting that the conditioning process enforces specific state mixtures that include both theoretical Ir(III) and Ir(IV) species, and raising the conditioning potential alters the surface species from an assumed mixture of Ir species to more oxidized Ir species.
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Affiliation(s)
- Paul Marsh
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
| | - Mao-Hsiang Huang
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
| | - Xing Xia
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
| | - Ich Tran
- Irvine Materials Research Institute, University of California Irvine, Irvine, CA 92697, USA;
| | - Plamen Atanassov
- Department of Chemical and Biomolecular Engineering, University of California Irvine, Irvine, CA 92697, USA;
- Department of Materials Science and Engineering, University of California Irvine, Irvine, CA 92697, USA
| | - Hung Cao
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
- Department of Biomedical Engineering, University of California Irvine, Irvine, CA 92697, USA
- Department of Computer Science, University of California Irvine, Irvine, CA 92697, USA
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15
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Wang B, Li J, Li D, Xu J, Liu S, Jiang Q, Zhang Y, Duan Z, Zhang F. Single Atom Iridium Decorated Nickel Alloys Supported on Segregated MoO 2 for Alkaline Water Electrolysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2305437. [PMID: 38109742 DOI: 10.1002/adma.202305437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 12/04/2023] [Indexed: 12/20/2023]
Abstract
Hetero-interface engineering has been widely employed to develop supported multicomponent catalysts for water electrolysis, but it still remains a substantial challenge for supported single atom alloys. Herein a conductive oxide MoO2 supported Ir1 Ni single atom alloys (Ir1 Ni@MoO2 SAAs) bifunctional electrocatalysts through surface segregation coupled with galvanic replacement reaction, where the Ir atoms are atomically anchored onto the surface of Ni nanoclusters via the Ir-Ni coordination accompanied with electron transfer from Ni to Ir is reported. Benefiting from the unique structure, the Ir1 Ni@MoO2 SAAs not only exhibit low overpotential of 48.6 mV at 10 mA cm-2 and Tafel slope of 19 mV dec-1 for hydrogen evolution reaction, but also show highly efficient alkaline water oxidation with overpotential of 280 mV at 10 mA cm-2 . Their overall water electrolysis exhibits a low cell voltage of 1.52 V at 10 mA cm-2 and excellent durability. Experiments and theoretical calculations reveal that the Ir-Ni interface effectively weakens hydrogen binding energy, and decoration of the Ir single atoms boost surface reconstruction of Ni species to enhance the coverage of intermediates (OH*) and switch the potential-determining step. It is suggested that this approach opens up a promising avenue to design efficient and durable precious metal bifunctional electrocatalysts.
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Affiliation(s)
- Bin Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Zhongshan Road 457, Dalian, 116023, P. R. China
- Center for Advanced Materials Research, School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhongyuan Road 41, Zhengzhou, 450007, P. R. China
| | - Jiangnan Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Zhongshan Road 457, Dalian, 116023, P. R. China
| | - Dongze Li
- Laboratory of Advanced Spectro-Electrochemistry and Li-Ion Batteries, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, P. R. China
| | - Junyuan Xu
- Laboratory of Advanced Spectro-Electrochemistry and Li-Ion Batteries, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, P. R. China
| | - Shoujie Liu
- School of Materials Science and Engineering, Anhui University, Jiulong Road 111, Hefei, 230601, P. R. China
| | - Qike Jiang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Zhongshan Road 457, Dalian, 116023, P. R. China
| | - Yashi Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Zhongshan Road 457, Dalian, 116023, P. R. China
| | - Zhiyao Duan
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Dongxiang Road 1, Xi'an, 710072, P. R. China
| | - Fuxiang Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Zhongshan Road 457, Dalian, 116023, P. R. China
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16
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Nartova AV, Kvon RI, Kovtunova LM, Skovpin IV, Koptyug IV, Bukhtiyarov VI. XPS and HR TEM Elucidation of the Diversity of Titania-Supported Single-Site Ir Catalyst Performance in Spin-Selective Propene Hydrogenation. Int J Mol Sci 2023; 24:15643. [PMID: 37958626 PMCID: PMC10650017 DOI: 10.3390/ijms242115643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/19/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
Immobilized [Ir(COD)Cl]2-Linker/TiO2 catalysts with linkers containing Py, P(Ph)2 and N(CH3)2 functional groups were prepared. The catalysts were tested via propene hydrogenation with parahydrogen in a temperature range from 40 °C to 120 °C which was monitored via NMR. The catalytic behavior of [Ir(COD)Cl]2-Linker/TiO2 is explained on the basis of quantitative and qualitative XPS data analysis performed for the catalysts before and after the reaction at 120 °C. It is shown that the temperature dependence of propene conversion and the enhancement of the NMR signal are explained via a combination of the stabilities of both the linker and immobilized [Ir(COD)Cl]2 complex. It is demonstrated that the N(CH3)2-linker is the most stable at the surface of TiO2 under used reaction conditions. As a result, only this sample shows a rise in the enhancement of the NMR signal in the 100-120 °C temperature range.
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Affiliation(s)
- Anna V. Nartova
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
| | - Ren I. Kvon
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
| | - Larisa M. Kovtunova
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
| | - Ivan V. Skovpin
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center SB RAS, Institutskaya St. 3A, 630090 Novosibirsk, Russia (I.V.K.)
| | - Igor V. Koptyug
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center SB RAS, Institutskaya St. 3A, 630090 Novosibirsk, Russia (I.V.K.)
| | - Valerii I. Bukhtiyarov
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
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17
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Lee GR, Kim J, Hong D, Kim YJ, Jang H, Han HJ, Hwang CK, Kim D, Kim JY, Jung YS. Efficient and sustainable water electrolysis achieved by excess electron reservoir enabling charge replenishment to catalysts. Nat Commun 2023; 14:5402. [PMID: 37669945 PMCID: PMC10480199 DOI: 10.1038/s41467-023-41102-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 08/18/2023] [Indexed: 09/07/2023] Open
Abstract
Suppressing the oxidation of active-Ir(III) in IrOx catalysts is highly desirable to realize an efficient and durable oxygen evolution reaction in water electrolysis. Although charge replenishment from supports can be effective in preventing the oxidation of IrOx catalysts, most supports have inherently limited charge transfer capability. Here, we demonstrate that an excess electron reservoir, which is a charged oxygen species, incorporated in antimony-doped tin oxide supports can effectively control the Ir oxidation states by boosting the charge donations to IrOx catalysts. Both computational and experimental analyses reveal that the promoted charge transfer driven by excess electron reservoir is the key parameter for stabilizing the active-Ir(III) in IrOx catalysts. When used in a polymer electrolyte membrane water electrolyzer, Ir catalyst on excess electron reservoir incorporated support exhibited 75 times higher mass activity than commercial nanoparticle-based catalysts and outstanding long-term stability for 250 h with a marginal degradation under a water-splitting current of 1 A cm-2. Moreover, Ir-specific power (74.8 kW g-1) indicates its remarkable potential for realizing gigawatt-scale H2 production for the first time.
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Affiliation(s)
- Gyu Rac Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jun Kim
- Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology, 14-gil 5, Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Doosun Hong
- Computational Science Research Center, Korea Institute of Science and Technology, 14-gil 5, Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Ye Ji Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Hanhwi Jang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hyeuk Jin Han
- Department of Environment and Energy Engineering, Sungshin Women's University, 55, Dobong-ro 76ga-gil, Gangbuk-gu, Seoul, 01133, Republic of Korea
| | - Chang-Kyu Hwang
- Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST), 14-gil 5, Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Donghun Kim
- Computational Science Research Center, Korea Institute of Science and Technology, 14-gil 5, Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea.
| | - Jin Young Kim
- Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology, 14-gil 5, Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea.
| | - Yeon Sik Jung
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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18
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Nair S, Yang Z, Lee D, Guo S, Sadowski JT, Johnson S, Saboor A, Li Y, Zhou H, Comes RB, Jin W, Mkhoyan KA, Janotti A, Jalan B. Engineering metal oxidation using epitaxial strain. NATURE NANOTECHNOLOGY 2023; 18:1005-1011. [PMID: 37217765 DOI: 10.1038/s41565-023-01397-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 04/13/2023] [Indexed: 05/24/2023]
Abstract
The oxides of platinum group metals are promising for future electronics and spintronics due to the delicate interplay of spin-orbit coupling and electron correlation energies. However, their synthesis as thin films remains challenging due to their low vapour pressures and low oxidation potentials. Here we show how epitaxial strain can be used as a control knob to enhance metal oxidation. Using Ir as an example, we demonstrate the use of epitaxial strain in engineering its oxidation chemistry, enabling phase-pure Ir or IrO2 films despite using identical growth conditions. The observations are explained using a density-functional-theory-based modified formation enthalpy framework, which highlights the important role of metal-substrate epitaxial strain in governing the oxide formation enthalpy. We also validate the generality of this principle by demonstrating epitaxial strain effect on Ru oxidation. The IrO2 films studied in our work further revealed quantum oscillations, attesting to the excellent film quality. The epitaxial strain approach we present could enable growth of oxide films of hard-to-oxidize elements using strain engineering.
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Affiliation(s)
- Sreejith Nair
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA.
| | - Zhifei Yang
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA
| | - Dooyong Lee
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA
| | - Silu Guo
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA
| | - Jerzy T Sadowski
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA
| | | | - Abdul Saboor
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA
| | - Yan Li
- Materials Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Hua Zhou
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Ryan B Comes
- Department of Physics, Auburn University, Auburn, AL, USA
| | - Wencan Jin
- Department of Physics, Auburn University, Auburn, AL, USA
| | - K Andre Mkhoyan
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA
| | - Anderson Janotti
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA
| | - Bharat Jalan
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA.
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19
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Wang Y, Yin L, Qu G, Leung CH, Han L, Lu L. Highly Active Single-Atom Nanozymes with High-Loading Iridium for Sensitive Detection of Pesticides. Anal Chem 2023; 95:11960-11968. [PMID: 37530640 DOI: 10.1021/acs.analchem.3c01569] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Single-atom nanozymes (SAzymes) are novel mimic-enzyme materials with atomically doped active sites. They play a pivotal role in the field of nanozymes because of their excellent catalytic activities, high utilization efficiency of the metal atoms, and simple model of active sites. Herein, the peroxidase (POD)-like SAzymes with high-loading iridium (Ir) (5.31%) on graphene oxide (GO) nanosheets [Ir(III)/GO] were prepared through a coordination reaction between the Ir(III) complex and the oxygen-containing groups in GO. The preparation strategy avoids nitrogen doping and pyrolysis procedures which are the usually used strategies to improve the GO-based enzyme mimic activity. Ascribed to the highly active Ir atoms, Ir(III)/GO SAzymes demonstrate outstanding POD-like activity without the oxidase-like activity. In advantage of the excellent POD-like activity, a simple and sensitive colorimetric pesticide detection platform is established. The developed sensing platform offers an excellent "switch-on" pirimicarb (PIB) detection in the linear range of 10-300 nM with a limit of detection (LOD) of 2.81 nM. Moreover, the detection platform was fabricated into a portable test kit, which is composed of a test swab and sample processing tube. In the aid of a color-reading APP, the test kit can detect PIB with the LOD of 3.31 nM. It is astonishing to get this excellent detection sensitivity just using the simple colorimetric strategy. This work not only provides a novel strategy to synthesize Ir-based SAzymes but also exhibits the super capability of Ir(III)/GO in the biosensing field.
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Affiliation(s)
- Ying Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Li Yin
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Guangxu Qu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao 999078, China
| | - Lei Han
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Lihua Lu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
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20
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Guo H, Li L, Chen Y, Zhang W, Shang C, Cao X, Li M, Zhang Q, Tan H, Nie Y, Gu L, Guo S. Precise Strain Tuning Boosts Electrocatalytic Hydrogen Generation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302285. [PMID: 37248040 DOI: 10.1002/adma.202302285] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/08/2023] [Indexed: 05/31/2023]
Abstract
Strain engineering has been utilized as an effective approach to regulate the binding of reaction intermediates and modify catalytic behavior on noble metal nanocatalysts. However, the continuous, precise control of strain for a depiction of strain-activity correlation remains a challenge. Herein, Pd-based nanooctahedrons coated with two Ir overlayers are constructed, and subject to different postsynthetic treatments to alter the amount of H intercalated into Pd core for achieving three different surface strains (o-Pd/Ir-1.2%, o-Pd/Ir-1.7%, and o-Pd/Ir-2.1% NPs). It is demonstrated that the catalytic performances of o-Pd/Ir NPs display a volcano-shaped curve against strains toward the hydrogen evolution reaction (HER). Specifically, o-Pd/Ir-1.7% NPs exhibit superior catalytic performance with a mass activity of 9.38 A mgIr -1 at -0.02 V versus reversible hydrogen electrode, 10.8- and 18.8-fold higher than those of commercial Pt/C and Ir/C, respectively, making it one of the most active HER electrocatalysts reported to date. Density function theory calculations verify that the moderate tensile strain on Ir(111) surfaces plays a pivotal role in optimizing the H binding energy. This work highlights a new strategy for precise control over the surface strain of nanocrystals for more efficient electrocatalysis.
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Affiliation(s)
- Hongyu Guo
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Lu Li
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Yan Chen
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Wenshu Zhang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Changshuai Shang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Xiaoqing Cao
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Menggang Li
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Hao Tan
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Yan Nie
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing, 100871, China
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21
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Chen S, Zhang S, Guo L, Pan L, Shi C, Zhang X, Huang ZF, Yang G, Zou JJ. Reconstructed Ir‒O‒Mo species with strong Brønsted acidity for acidic water oxidation. Nat Commun 2023; 14:4127. [PMID: 37438355 DOI: 10.1038/s41467-023-39822-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 06/30/2023] [Indexed: 07/14/2023] Open
Abstract
Surface reconstruction generates real active species in electrochemical conditions; rational regulating reconstruction in a targeted manner is the key for constructing highly active catalyst. Herein, we use the high-valence Mo modulated orthorhombic Pr3Ir1-xMoxO7 as model to activate lattice oxygen and cations, achieving directional and accelerated surface reconstruction to produce self-terminated Ir‒Obri‒Mo (Obri represents the bridge oxygen) active species that is highly active for acidic water oxidation. The doped Mo not only contributes to accelerated surface reconstruction due to optimized Ir‒O covalency and more prone dissolution of Pr, but also affords the improved durability resulted from Mo-buffered charge compensation, thereby preventing fierce Ir dissolution and excessive lattice oxygen loss. As such, Ir‒Obri‒Mo species could be directionally generated, in which the strong Brønsted acidity of Obri induced by remaining Mo assists with the facilitated deprotonation of oxo intermediates, following bridging-oxygen-assisted deprotonation pathway. Consequently, the optimal catalyst exhibits the best activity with an overpotential of 259 mV to reach 10 mA cmgeo-2, 50 mV lower than undoped counterpart, and shows improved stability for over 200 h. This work provides a strategy of directional surface reconstruction to constructing strong Brønsted acid sites in IrOx species, demonstrating the perspective of targeted electrocatalyst fabrication under in situ realistic reaction conditions.
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Affiliation(s)
- Shiyi Chen
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China
| | - Shishi Zhang
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China
| | - Lei Guo
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China
| | - Lun Pan
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Chengxiang Shi
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Xiangwen Zhang
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Zhen-Feng Huang
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China.
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China.
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China.
| | - Guidong Yang
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.
| | - Ji-Jun Zou
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China.
- Collaborative Innovative Centre of Chemical Science and Engineering (Tianjin), 300072, Tianjin, China.
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China.
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22
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Cai Z, Wang P, Zhao X, Bu X, Zhang J, Chen Y, Xu J, Yan Y, Chen A, Wang X. Ultralow-iridium content NiIr alloy derivative nanochain arrays as bifunctional electrocatalysts for overall water splitting. RSC Adv 2023; 13:17315-17323. [PMID: 37304768 PMCID: PMC10249465 DOI: 10.1039/d3ra01845h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/30/2023] [Indexed: 06/13/2023] Open
Abstract
The development of low-cost and high-durability bifunctional electrocatalysts is of considerable importance for overall water splitting (OWS). This work reports the controlled synthesis of nickel-iridium alloy derivative nanochain array electrodes (NiIrx NCs) with fully exposed active sites that facilitated mass transfer for efficient OWS. The nanochains have a self-supported three-dimensional core-shell structure, composed of a metallic NiIrx core and a thin (5-10 nm) amorphous (hydr)oxide film as the shell (e.g., IrO2/NiIrx and Ni(OH)2/NiIrx). Interestingly, NiIrx NCs have bifunctional properties. Particularly, the oxygen evolution reaction (OER) current density (electrode geometrical area) of NiIr1 NCs is four times higher than that of IrO2 at 1.6 V vs. RHE. Meanwhile, its hydrogen evolution reaction (HER) overpotential at 10 mA cm-2 (η10 = 63 mV) is comparable to that of 10 wt% Pt/C. These performances may originate from the interfacial effect between the surface (hydr)oxide shell and metallic NiIrx core, which facilitates the charge transfer, along with the synergistic effect between Ni2+ and Ir4+ in the (hydr)oxide shell. Furthermore, NiIr1 NCs exhibits excellent OER durability (100 h @ 200 mA cm-2) and OWS durability (100 h @ 500 mA cm-2) with the nanochain array structure well preserved. This work provides a promising route for developing effective bifunctional electrocatalysts for OWS applications.
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Affiliation(s)
- Zhengyang Cai
- School of Materials and Chemistry, University of Shanghai for Science and Technology 200093 Shanghai P. R. China
- Energy Materials Research Center Institute of Ceramics, Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Ping Wang
- Energy Materials Research Center Institute of Ceramics, Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Xianglong Zhao
- School of Science, Shandong Jianzhu University Jinan 250101 P. R. China
| | - Xiuming Bu
- Energy Materials Research Center Institute of Ceramics, Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Jiajia Zhang
- Energy Materials Research Center Institute of Ceramics, Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Yuhao Chen
- School of Materials and Chemistry, University of Shanghai for Science and Technology 200093 Shanghai P. R. China
- Energy Materials Research Center Institute of Ceramics, Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Jingcheng Xu
- School of Materials and Chemistry, University of Shanghai for Science and Technology 200093 Shanghai P. R. China
| | - Ya Yan
- Energy Materials Research Center Institute of Ceramics, Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Aiying Chen
- School of Materials and Chemistry, University of Shanghai for Science and Technology 200093 Shanghai P. R. China
| | - Xianying Wang
- Energy Materials Research Center Institute of Ceramics, Chinese Academy of Sciences 200050 Shanghai P. R. China
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23
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Paul P, Schmitt P, Sigurjónsdóttir VV, Hanemann K, Felde N, Schröder S, Otto F, Gruenewald M, Fritz T, Roddatis V, Tünnermann A, Szeghalmi A. Atomically Thin Metal-Dielectric Heterostructures by Atomic Layer Deposition. ACS APPLIED MATERIALS & INTERFACES 2023; 15:22626-22636. [PMID: 37097287 DOI: 10.1021/acsami.2c22590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Heterostructures increasingly attracted attention over the past several years to enable various optoelectronic and photonic applications. In this work, atomically thin interfaces of Ir/Al2O3 heterostructures compatible with micro-optoelectronic technologies are reported. Their structural and optical properties were determined by spectroscopic and microscopic techniques (XRR, XPS, HRTEM, spectroscopic ellipsometry, and UV/vis/NIR spectrophotometry). The XRR and HRTEM analyses reveal a layer-by-layer growth mechanism of Ir in atomic scale heterostructures, which is different from the typical island-type growth of metals on dielectrics. Alongside, XPS investigations imply the formation of Ir-O-Al bonding at the interfaces for lower Ir concentrations, in contrast to the nanoparticle core-shell structure formation. Precisely tuning the ratio of the constituents ensures the control of the dispersion profile along with a transition from effective dielectric to metallic heterostructures. The Ir coating thickness was varied ranging from a few angstroms to films of about 7 nm in the heterostructures. The transition has been observed in the structures containing individual Ir coating thicknesses of about 2-4 nm. Following this, we show epsilon-near-zero metamaterials with tunable dielectric constants by precisely varying the composition of such heterostructures. Overall, a comprehensive study on structural and optical properties of the metal-dielectric interfaces of Ir/Al2O3 heterostructures was addressed, indicating an extension of the material portfolio available for novel optical functionalities.
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Affiliation(s)
- Pallabi Paul
- Institute of Applied Physics and Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
| | - Paul Schmitt
- Institute of Applied Physics and Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
| | - Vilborg Vala Sigurjónsdóttir
- Institute of Applied Physics and Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
| | - Kevin Hanemann
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
| | - Nadja Felde
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
| | - Sven Schröder
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
| | - Felix Otto
- Institute of Solid-State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Marco Gruenewald
- Institute of Solid-State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Torsten Fritz
- Institute of Solid-State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Vladimir Roddatis
- Institute of Materials Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Andreas Tünnermann
- Institute of Applied Physics and Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
| | - Adriana Szeghalmi
- Institute of Applied Physics and Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany
- Center of Excellence in Photonics, Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, 07745 Jena, Germany
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24
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Ashton R, Silver CD, Bird TW, Coulson B, Pratt A, Johnson S. Enhancing the repeatability and sensitivity of low-cost PCB, pH-sensitive field-effect transistors. Biosens Bioelectron 2023; 227:115150. [PMID: 36821993 DOI: 10.1016/j.bios.2023.115150] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/30/2023] [Accepted: 02/12/2023] [Indexed: 02/18/2023]
Abstract
Discrete, extended gate pH-sensitive field-effect transistors (dEGFETs) fabricated on printed circuit boards (PCBs) are a low-cost, simple to manufacture analytical technology that can be applied to a wide range of applications. Electrodeposited iridium oxide (IrOx) films have emerged as promising pH-sensitive layers owing to their theoretically high pH sensitivity and facile deposition, but typically exhibit low pH sensitivity or lack reproducibility. Moreover, to date, a combined IrOx and dEGFET PCB system has not yet been realised. In this study, we demonstrate a dEGFET pH sensor based on an extended gate manufactured on PCB that is rendered pH sensitive through an electrodeposited IrOx film, which can reliably and repeatably display beyond-Nernstian pH response. Using a combination of complementary surface analysis techniques, we show that the high pH sensitivity and repeatability of the dEGFETs are dependent on both the chemical composition and critically the uniformity of the IrOx film. The IrOx film uniformity can be enhanced through electrochemical polishing of the extended gate electrode prior to electrodeposition, leading to dEGFETs that exhibit a median pH sensitivity of 70.7 ± 5 mV/pH (n = 56) compared to only 31.3 ± 14 mV/pH (n = 31) for IrOx electrodeposited on non-polished PCB electrodes. Finally, we demonstrate the applicability of these devices by demonstrating the detection and quantification of ampicillin due to β-Lactamase enzyme activity, thus laying the foundation for cheap and ubiquitous sensors which can be applied to a range of global challenges across healthcare and environmental monitoring.
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Affiliation(s)
- Rhys Ashton
- School of Physics, Engineering & Technology, University of York, York, YO10 5DD, UK.
| | - Callum D Silver
- School of Physics, Engineering & Technology, University of York, York, YO10 5DD, UK.
| | - Toby W Bird
- School of Physics, Engineering & Technology, University of York, York, YO10 5DD, UK.
| | - Ben Coulson
- School of Physics, Engineering & Technology, University of York, York, YO10 5DD, UK.
| | - Andrew Pratt
- School of Physics, Engineering & Technology, University of York, York, YO10 5DD, UK.
| | - Steven Johnson
- School of Physics, Engineering & Technology, University of York, York, YO10 5DD, UK.
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25
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Operando CO Infrared Spectroscopy and On-Line Mass Spectrometry for Studying the Active Phase of IrO2 in the Catalytic CO Oxidation Reaction. INORGANICS 2023. [DOI: 10.3390/inorganics11030102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023] Open
Abstract
We combine operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) with on-line mass spectrometry (MS) to study the correlation between the oxidation state of titania-supported IrO2 catalysts (IrO2@TiO2) and their catalytic activity in the prototypical CO oxidation reaction. Here, the stretching vibration of adsorbed COad serves as the probe. DRIFTS provides information on both surface and gas phase species. Partially reduced IrO2 is shown to be significantly more active than its fully oxidized counterpart, with onset and full conversion temperatures being about 50 °C lower for reduced IrO2. By operando DRIFTS, this increase in activity is traced to a partially reduced state of the catalysts, as evidenced by a broad IR band of adsorbed CO reaching from 2080 to 1800 cm−1.
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26
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Chen K, Xiao J, Vequizo JJM, Hisatomi T, Ma Y, Nakabayashi M, Takata T, Yamakata A, Shibata N, Domen K. Overall Water Splitting by a SrTaO 2N-Based Photocatalyst Decorated with an Ir-Promoted Ru-Based Cocatalyst. J Am Chem Soc 2023; 145:3839-3843. [PMID: 36669205 PMCID: PMC9952422 DOI: 10.1021/jacs.2c11025] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Indexed: 01/22/2023]
Abstract
The development of narrow-bandgap photocatalysts for one-step-excitation overall water splitting (OWS) remains a critical challenge in the field of solar hydrogen production. SrTaO2N is a photocatalytic material having a band structure suitable for OWS under visible light (λ ≤ 600 nm). However, the presence of defects in the oxynitride and the lack of cocatalysts to promote simultaneous hydrogen and oxygen evolution make it challenging to realize OWS using this material. The present work demonstrates a SrTaO2N-based particulate photocatalyst for OWS. This photocatalyst, which was composed of single crystals, was obtained by nitriding SrCl2 and Ta2O5 together with NaOH, with the latter added to control the formation of defects. The subsequent loading of bimetallic RuIrOx nanoparticles accelerated charge separation and allowed the SrTaO2N photocatalyst to exhibit superior OWS activity. This research presenting the strategies of controlling the oxygen sources and promoting the cocatalyst function is expected to expand the range of potential OWS-active oxynitride photocatalysts and permit the design of efficient cocatalysts for photocatalytic OWS.
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Affiliation(s)
- Kaihong Chen
- Research
Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting
Edge Research, Shinshu University, Nagano-shi, Nagano 380-8553, Japan
| | - Jiadong Xiao
- Research
Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting
Edge Research, Shinshu University, Nagano-shi, Nagano 380-8553, Japan
| | - Junie Jhon M. Vequizo
- Research
Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting
Edge Research, Shinshu University, Nagano-shi, Nagano 380-8553, Japan
| | - Takashi Hisatomi
- Research
Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting
Edge Research, Shinshu University, Nagano-shi, Nagano 380-8553, Japan
- PRESTO,
JST, 4-17-1 Wakasato, Nagano-shi, Nagano 380-8553, Japan
| | - Yiwen Ma
- Research
Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting
Edge Research, Shinshu University, Nagano-shi, Nagano 380-8553, Japan
| | - Mamiko Nakabayashi
- Institute
of Engineering Innovation, The University
of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Tsuyoshi Takata
- Research
Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting
Edge Research, Shinshu University, Nagano-shi, Nagano 380-8553, Japan
| | - Akira Yamakata
- Graduate
School of Natural Science & Technology, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan
| | - Naoya Shibata
- Institute
of Engineering Innovation, The University
of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazunari Domen
- Research
Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting
Edge Research, Shinshu University, Nagano-shi, Nagano 380-8553, Japan
- Office
of University Professors, The University
of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
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27
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Wang Y, Guo X, Wang X, Huang J, Yin L, Zhu W, Zhuang Z. Construction of steady-active self-supported porous Ir-based electrocatalysts for the oxygen evolution reaction. Chem Commun (Camb) 2023; 59:1813-1816. [PMID: 36722877 DOI: 10.1039/d2cc06231c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Developing highly active and stable oxygen evolution reaction (OER) catalysts for water electrolysis remains a great challenge. A self-supported Ir nanocatalyst was prepared via a self-assembly method. Its porous structure and residual metal incorporation contributed to its high activity and stability for the OER in acid.
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Affiliation(s)
- Yongsheng Wang
- Institute of Science and Technology, China Three Gorges Corporation, Beijing 100038, China. .,State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xiaoxuan Guo
- State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xinyu Wang
- Institute of Science and Technology, China Three Gorges Corporation, Beijing 100038, China. .,International Clean Energy Research Office, China Three Gorges Corporation, Beijing 100038, China
| | - Junling Huang
- International Clean Energy Research Office, China Three Gorges Corporation, Beijing 100038, China
| | - Likun Yin
- Institute of Science and Technology, China Three Gorges Corporation, Beijing 100038, China.
| | - Wei Zhu
- State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Zhongbin Zhuang
- State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. .,Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China
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Lu X, Liu Z, Zhang JR, Zhou Y, Wang L, Zhu JJ. General Synergistic Hybrid Catalyst Synthesis Method Using a Natural Enzyme Scaffold-Confined Metal Nanocluster. ACS APPLIED MATERIALS & INTERFACES 2023; 15:761-771. [PMID: 36580579 DOI: 10.1021/acsami.2c14487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Due to differences in the chemical properties or optimal reaction conditions of the catalysts, the challenge in the design of bio-chemical hybrid catalysts is that the bio-catalysts or chemical catalysts usually cannot maintain the initial catalytic performance. Herein, we report a general bio-chemical hybrid catalyst synthesis method using a natural enzyme scaffold-confined metal nanocluster. A redox-active enzyme is a nanoreactor that allows access to and reduces metal ions into metal nanoclusters in situ, resulting in the enzyme-confined metal nanocluster hybrid catalyst with a synergistic effect to boost catalytic performance. Specifically, bilirubin oxidase-Ir nanoclusters (BOD-Ir NCs) with catalytic properties for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are designed. The BOD-Ir NCs exhibit an approximately 2-fold ORR activity compared with pure BOD and a 4-fold OER activity compared with pure Ir NCs. BOD-Ir NCs exhibit stability for over 50,000 s, exceeding that of pure Ir NCs (22,000 s). The synergistic catalytic performance is attributed to the following: the mild preparation condition and matched sizes of BOD and the Ir NCs maintain the natural activity of BOD; the highly conductive Ir NCs improve the ORR activity of BOD; and the confining effect of BOD, which improves the stability and activity of the Ir NCs during the OER. In particular, BOD-Ir NCs exhibit a high half-wave potential of 0.97 V for the ORR and a low overpotential of 319 mV at 10 mA cm-2 for the OER, surpassing most of reported catalysts under neutral conditions. Furthermore, laccase-Ir NCs and glucose oxidase-Pd NCs with synergistic catalytic performances are fabricated, proving the universality of this synthetic method. This facile strategy for designing synergistic hybrid catalysts is expected to be applied to more complex chemical transformations.
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Affiliation(s)
- Xuanzhao Lu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing210023, China
| | - Zhuo Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing210023, China
| | - Jian-Rong Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing210023, China
| | - Yang Zhou
- Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing210023, China
| | - Linlin Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing210023, China
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an710021, China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing210023, China
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Leahy CA, Vura-Weis J. Femtosecond Extreme Ultraviolet Spectroscopy of an Iridium Photocatalyst Reveals Oxidation State and Ligand Field Specific Dynamics. J Phys Chem A 2022; 126:9510-9518. [DOI: 10.1021/acs.jpca.2c05562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Clare A. Leahy
- Department of Chemistry, University of Illinois at Urbana─Champaign, Urbana, Illinois 61801, United States
| | - Josh Vura-Weis
- Department of Chemistry, University of Illinois at Urbana─Champaign, Urbana, Illinois 61801, United States
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30
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Boysen N, Wree JL, Zanders D, Rogalla D, Öhl D, Schuhmann W, Devi A. High-Performance Iridium Thin Films for Water Splitting by CVD Using New Ir(I) Precursors. ACS APPLIED MATERIALS & INTERFACES 2022; 14:52149-52162. [PMID: 36351209 DOI: 10.1021/acsami.2c13865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Thin films of iridium can be utilized in a wide range of applications and are particularly interesting for catalytic transformations. For the scalable deposition of functional Ir thin films, metalorganic chemical vapor deposition (MOCVD) is the method of choice, for which organometallic precursors that embody a high volatility and thermal stability need to be specifically tailored. Herein, we report the synthesis, analysis, and evaluation of new volatile Ir(I)-1,5-cyclooctadiene complexes bearing all-nitrogen coordinating guanidinate (N,N'-diisopropyl-2-dimethylamido-guanidinate (DPDMG)), amidinate (N,N'-diisopropyl-amidinate (DPAMD)), and formamidinate (N,N'-diisopropyl-formamidinate (DPfAMD)) ligands. The amidinate-based Ir complex [Ir(COD)(DPAMD)] together with O2 was implemented in MOCVD experiments resulting in highly crystalline, dense, and conductive Ir films on a variety of substrate materials. The Ir deposits achieved outstanding electrochemical performance with overpotentials in the range of 50 mV at -10 mA·cm-2 for catalytic hydrogen evolution reaction (HER) in acidic solution. The ability to deposit Ir layers via MOCVD exhibiting promising functional properties is a significant step toward large-scale applications.
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Affiliation(s)
- Nils Boysen
- Inorganic Materials Chemistry (IMC), Ruhr University Bochum, 44801 Bochum, Germany
| | - Jan-Lucas Wree
- Inorganic Materials Chemistry (IMC), Ruhr University Bochum, 44801 Bochum, Germany
| | - David Zanders
- Inorganic Materials Chemistry (IMC), Ruhr University Bochum, 44801 Bochum, Germany
| | | | - Denis Öhl
- Analytical Chemistry─Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, Germany
| | - Wolfgang Schuhmann
- Analytical Chemistry─Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, Germany
| | - Anjana Devi
- Inorganic Materials Chemistry (IMC), Ruhr University Bochum, 44801 Bochum, Germany
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31
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Spark Ablation for the Fabrication of PEM Water Electrolysis Catalyst-Coated Membranes. Catalysts 2022. [DOI: 10.3390/catal12111343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Proton-exchange-membrane (PEM) electrolyzers represent a promising technology for sustainable hydrogen production, owing to their efficiency and load flexibility. However, the acidic nature of PEM demands the use of platinum-group metal-electrocatalysts. Apart from the associated high capital costs, the scarcity of Ir hinders the large-scale implementation of the technology. Since low-cost replacements for Ir are not available at present, there is an urgent need to engineer catalyst-coated membranes (CCMs) with homogeneous catalyst layers at low Ir loadings. Efforts to realize this mainly rely on the development of advanced Ir nanostructures with maximized dispersion via wet chemistry routes. This study demonstrates the potential of an alternative vapor-based process, based on spark ablation and impaction, to fabricate efficient and durable Ir- and Pt-coated membranes. Our results indicate that spark-ablation CCMs can reduce the Ir demand by up to five times compared to commercial CCMs, without a compromise in activity. The durability of spark-ablation CCMs has been investigated by applying constant and dynamic load profiles for 150 h, indicating different degradation mechanisms for each case without major pitfalls. At constant load, an initial degradation in performance was observed during the first 30 h, but a stable degradation rate of 0.05 mV h−1 was sustained during the rest of the test. The present results, together with manufacturing aspects related to simplicity, costs and environmental footprint, suggest the high potential of spark ablation having practical applications in CCM manufacturing.
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32
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Lim S, Cho J, Park S. Elevating IrOx acidic oxygen evolution activity using SnO2-rGO hybrid support. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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33
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Li N, Cai L, Gao G, Liu Y, Wang C, Liu Z, Ji Q, Duan H, Wang LW, Yan W. Origin of Surface Amorphization and Catalytic Stability of Ca 2–xIrO 4 Nanocrystals for Acidic Oxygen Evolution: Critical Roles of Acid Anions. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Na Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Liang Cai
- Department of Physics, National University of Singapore, Singapore 117542, Singapore
| | - Guoping Gao
- MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics, School of Physics, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, P. R. China
| | - Yuying Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Chao Wang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Ziyi Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Qianqian Ji
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Hengli Duan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Lin-Wang Wang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
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34
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Li N, Cai L, Gao G, Lin Y, Wang C, Liu H, Liu Y, Duan H, Ji Q, Hu W, Tan H, Qi Z, Wang LW, Yan W. Operando Direct Observation of Stable Water-Oxidation Intermediates on Ca 2-xIrO 4 Nanocrystals for Efficient Acidic Oxygen Evolution. NANO LETTERS 2022; 22:6988-6996. [PMID: 36005477 DOI: 10.1021/acs.nanolett.2c01777] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We report Ca2-xIrO4 nanocrystals exhibit record stability of 300 h continuous operation and high iridium mass activity (248 A gIr-1 at 1.5 VRHE) that is about 62 times that of benchmark IrO2. Lattice-resolution images and surface-sensitive spectroscopies demonstrate the Ir-rich surface layer (evolved from one-dimensional connected edge-sharing [IrO6] octahedrons) with high relative content of Ir5+ sites, which is responsible for the high activity and long-term stability. Combining operando infrared spectroscopy with X-ray absorption spectroscopy, we report the first direct observation of key intermediates absorbing at 946 cm-1 (Ir6+═O site) and absorbing at 870 cm-1 (Ir6+OO- site) on iridium-based oxides electrocatalysts, and further discover the Ir6+═O and Ir6+OO- intermediates are stable even just from 1.3 VRHE. Density functional theory calculations indicate the catalytic activity of Ca2IrO4 is enhanced remarkably after surface Ca leaching, and suggest IrOO- and Ir═O intermediates can be stabilized on positive charged active sites of Ir-rich surface layer.
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Affiliation(s)
- Na Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore
| | - Liang Cai
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore
| | - Guoping Gao
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics, School of Physics, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Yue Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Chao Wang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hengjie Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Yuying Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hengli Duan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Qianqian Ji
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Wei Hu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hao Tan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Zeming Qi
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Lin-Wang Wang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
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35
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de Lima SLS, Pereira FS, de Lima RB, de Freitas IC, Spadotto J, Connolly BJ, Barreto J, Stavale F, Vitorino HA, Fajardo HV, Tanaka AA, Garcia MAS, da Silva AGM. MnO 2-Ir Nanowires: Combining Ultrasmall Nanoparticle Sizes, O-Vacancies, and Low Noble-Metal Loading with Improved Activities towards the Oxygen Reduction Reaction. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12173039. [PMID: 36080076 PMCID: PMC9457901 DOI: 10.3390/nano12173039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 08/11/2022] [Accepted: 08/16/2022] [Indexed: 06/02/2023]
Abstract
Although clean energy generation utilizing the Oxygen Reduction Reaction (ORR) can be considered a promising strategy, this approach remains challenging by the dependence on high loadings of noble metals, mainly Platinum (Pt). Therefore, efforts have been directed to develop new and efficient electrocatalysts that could decrease the Pt content (e.g., by nanotechnology tools or alloying) or replace them completely in these systems. The present investigation shows that high catalytic activity can be reached towards the ORR by employing 1.8 ± 0.7 nm Ir nanoparticles (NPs) deposited onto MnO2 nanowires surface under low Ir loadings (1.2 wt.%). Interestingly, we observed that the MnO2-Ir nanohybrid presented high catalytic activity for the ORR close to commercial Pt/C (20.0 wt.% of Pt), indicating that it could obtain efficient performance using a simple synthetic procedure. The MnO2-Ir electrocatalyst also showed improved stability relative to commercial Pt/C, in which only a slight activity loss was observed after 50 reaction cycles. Considering our findings, the superior performance delivered by the MnO2-Ir nanohybrid may be related to (i) the significant concentration of reduced Mn3+ species, leading to increased concentration of oxygen vacancies at its surface; (ii) the presence of strong metal-support interactions (SMSI), in which the electronic effect between MnOx and Ir may enhance the ORR process; and (iii) the unique structure comprised by Ir ultrasmall sizes at the nanowire surface that enable the exposure of high energy surface/facets, high surface-to-volume ratios, and their uniform dispersion.
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Affiliation(s)
- Scarllett L. S. de Lima
- Departamento de Engenharia Química e de Materiais-DEQM, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rua Marquês de São Vicente, 225 Gávea, Rio de Janeiro 22453-900, RJ, Brazil
| | - Fellipe S. Pereira
- Departamento de Química, Centro de Ciências Exatas e Tecnologias, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966 Vila Bacanga, São Luís 65080-805, MA, Brazil
| | - Roberto B. de Lima
- Departamento de Química, Centro de Ciências Exatas e Tecnologias, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966 Vila Bacanga, São Luís 65080-805, MA, Brazil
| | - Isabel C. de Freitas
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo 05508-000, SP, Brazil
| | - Julio Spadotto
- Department of Materials, Henry Royce Institute, University of Manchester, Manchester M13 9PL, UK
| | - Brian J. Connolly
- Department of Materials, Henry Royce Institute, University of Manchester, Manchester M13 9PL, UK
| | - Jade Barreto
- Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro 22290-180, RJ, Brazil
| | - Fernando Stavale
- Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro 22290-180, RJ, Brazil
| | - Hector A. Vitorino
- South American Center for Education and Research in Public Health, Universidad Norbert Wiener, Lima 15108, Peru
| | - Humberto V. Fajardo
- Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto 35400-000, MG, Brazil
| | - Auro A. Tanaka
- Departamento de Química, Centro de Ciências Exatas e Tecnologias, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966 Vila Bacanga, São Luís 65080-805, MA, Brazil
| | - Marco A. S. Garcia
- Departamento de Química, Centro de Ciências Exatas e Tecnologias, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966 Vila Bacanga, São Luís 65080-805, MA, Brazil
| | - Anderson G. M. da Silva
- Departamento de Engenharia Química e de Materiais-DEQM, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rua Marquês de São Vicente, 225 Gávea, Rio de Janeiro 22453-900, RJ, Brazil
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36
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Wang M, Zhu W, Ma M, Fan Z, Yang J, Liao F, Shao M. Lattice Strain Enhance the Activity of Ir‐IrO2/C for Acidic Oxygen Evolution Reaction. ChemElectroChem 2022. [DOI: 10.1002/celc.202200732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Meng Wang
- Soochow University Institute of Functional Nano & Soft Materials CHINA
| | - Wenxiang Zhu
- Soochow University Institute of Functional Nano & Soft Materials CHINA
| | - Mengjie Ma
- Soochow University Institute of Functional Nano & Soft Materials CHINA
| | - Zhenglong Fan
- Soochow University Institute of Functional Nano & Soft Materials CHINA
| | - Junjun Yang
- Soochow University Institute of Functional Nano & Soft Materials CHINA
| | - Fan Liao
- Soochow University Institute of Functional Nano & Soft Materials CHINA
| | - Mingwang Shao
- Soochew University Functional nanomaterials & soft materials Laboratory Ren-ai Road 215123 SuZhou CHINA
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37
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Telang P, Bandyopadhyay A, Mishra K, Rout D, Bag R, Gloskovskii A, Matveyev Y, Singh S. X-ray photoemission and absorption study of the pyrochlore iridates (Eu1-xBi x) 2Ir 2O 7, 0 ⩽ x ⩽ 1. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:395601. [PMID: 35817027 DOI: 10.1088/1361-648x/ac8038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
The pyrochlore iridates (Eu1-xBix)2Ir2O7(0⩽x⩽1) undergo an anomalous negative lattice expansion for small Bi-doping (x⩽0.035) (region I) and a normal lattice expansion forx⩾0.1(region II); this is accompanied by a transition from an insulating (and magnetically ordered) to a metallic (and with no magnetic ordering) ground state. Here, we investigate (Eu1-xBix)2Ir2O7(0⩽x⩽1) using hard x-ray photoemission spectroscopy and x-ray absorption fine structure (XAFS) spectroscopy. By analyzing the Eu-L3, Ir-L3and Bi-L2&L3edges x-ray absorption near edge structure spectra and Eu-3dcore-level XPS spectra, we show that the metal cations retain their nominal valence, namely, Ir4+, Bi3+and Eu3+, respectively, throughout the series. The Ir-4fand Bi-4fcore-level XPS spectra consist of screened and unscreened doublets. The unscreened component is dominant In the insulating range (x⩽0.035), and in the metallic region (x⩾0.1), the screened component dominates the spectra. The Eu-3dcore-level spectra remain invariant under Bi doping. The extended XAFS data show that the coordination around the Ir remains well preserved throughout the series. The evolution of the valence band spectra near the Fermi energy with increasing Bi doping indicates the presence of strong Ir(5d)-Bi(6p) hybridization which drives the metal-to-insulator transition.
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Affiliation(s)
- Prachi Telang
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Abhisek Bandyopadhyay
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Kshiti Mishra
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Dibyata Rout
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Rabindranath Bag
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - A Gloskovskii
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Yu Matveyev
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Surjeet Singh
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
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38
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Wang K, Horlyck J, Finn MT, Mesa MG, Voutchkova-Kostal A. Electronic Effects of Support Doping on Hydrotalcite-Supported Iridium N-Heterocyclic Carbene Complexes. ACS OMEGA 2022; 7:24705-24713. [PMID: 35874240 PMCID: PMC9301727 DOI: 10.1021/acsomega.2c02593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The electronic effects of supports on immobilized organometallic complexes impact their activity and lifetime, yet remain poorly understood. Here we describe a systematic study of the support effects experienced by an organometallic complex immobilized on doped hydrotalcite-like materials. To that end, we describe the synthesis and characterization of the first organometallic species immobilized on a palette of doped hydrotalcites via sulfonate linkers. The organometallic species consists of iridium N-heterocyclic carbene (NHC) carbonyl complex ([Na][Ir-(NHC-Ph-SO3)2(CO)2]), a highly active molecular catalyst for transfer hydrogenation of glycerol. The hydrotalcite supports are composed of Al, Mg, and a compatible transition-metal dopant (Fe, Cu, Ni, Zn). The materials were characterized extensively by STEM, XPS, TGA, PXRD, FT-IR, N2 desorption, ICP-AES, TPD, and microcalorimetry to probe the morphology and electronic properties of the support and elucidate structure-property relationships.
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Affiliation(s)
- Kai Wang
- Department
of Chemistry, The George Washington University, 800 22nd St NW, Washington, DC 20052, United States
| | - Jonathan Horlyck
- Department
of Materials Science and Engineering, Johns
Hopkins University, Baltimore, Maryland 21218, United States
| | - Matthew T. Finn
- Department
of Chemistry, The George Washington University, 800 22nd St NW, Washington, DC 20052, United States
| | - Marta Granollers Mesa
- Energy
and Bioproducts Research Institute (EBRI), Aston University, Aston Triangle, Birmingham B4 7ET, United Kingdom
| | - Adelina Voutchkova-Kostal
- Department
of Chemistry, The George Washington University, 800 22nd St NW, Washington, DC 20052, United States
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39
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Ratrey G, Solanki BS, Kamble SP, Rode CV. Highly Efficient Chemoselective Hydrogenation of 5‐HMF to BHMF over Reusable Bimetallic Pd‐Ir/C Catalyst. ChemistrySelect 2022. [DOI: 10.1002/slct.202200456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Geetanjali Ratrey
- Chemical Engineering and Process Development Division CSIR-National Chemical Laboratory Pune Dr. Homi Bhabha Road, Pashan 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Bhanupratap S Solanki
- Chemical Engineering and Process Development Division CSIR-National Chemical Laboratory Pune Dr. Homi Bhabha Road, Pashan 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Sanjay P Kamble
- Chemical Engineering and Process Development Division CSIR-National Chemical Laboratory Pune Dr. Homi Bhabha Road, Pashan 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Chandrashekhar V. Rode
- Chemical Engineering and Process Development Division CSIR-National Chemical Laboratory Pune Dr. Homi Bhabha Road, Pashan 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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40
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Chen Z, Jiang Q, An H, Zhang J, Hao S, Li X, Cai L, Yu W, You K, Zhu X, Li C. Platinum Group Metal Catalyst (RuO x, PtO x, and IrO x)-Decorated Ceria-Zirconia Solid Solution as High Active Oxygen Carriers for Solar Thermochemical CO 2 Splitting. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02044] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhenpan Chen
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, P. R. China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
- National & Local United Engineering Research Center for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan 411105, P. R. China
| | - Qingqing Jiang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan 430074, P. R. China
| | - Hongyu An
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Juan Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Shuoqi Hao
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, P. R. China
| | - Xinju Li
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, P. R. China
| | - Lili Cai
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Wenguang Yu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Kuiyi You
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, P. R. China
- National & Local United Engineering Research Center for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan 411105, P. R. China
| | - Xuefeng Zhu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
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41
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Wang J, Liu H, Chen J, Cao L, Wang C. Enabling alcohol as a hydrogen carrier using metal-organic framework-stabilized Ir-Sc bifunctional catalytic sites. Chem Commun (Camb) 2022; 58:5857-5860. [PMID: 35467674 DOI: 10.1039/d2cc01114j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alcohols are attractive portable chemical carriers of hydrogen thanks to their reversible dehydrogenation, but the hydrogen release reaction is thermodynamically unfavorable. Coupling the alcohol dehydrogenation to acetal formation can shift the reaction thermodynamics for hydrogen production. Here, we stabilized Ir3+ and Sc3+ in a metal-organic framework (MOF) for tandem catalysis. The Ir3+ center bearing an α-hydroxybipyridine ligand catalyzes alcohol dehydrogenation, and the Sc3+ Lewis acid site catalyzes acetal formation that allows further dehydrogenation to form esters. The bifunctional UiO-bpyOH-IrCp-Sc catalyst effectively converts ethylene glycol to ester and H2 without producing CO.
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Affiliation(s)
- Jing Wang
- iChem, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.
| | - Huichong Liu
- iChem, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.
| | - Jiawei Chen
- iChem, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.
| | - Lingyun Cao
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, P. R. China
| | - Cheng Wang
- iChem, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.
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42
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Li H, Wei H, Zhang L, Su Z, Gong X. Engineering Ultrafine Ir Nanocrystals for Electrochemical Hydrogen Evolution With Highly Superior Mass Activity. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.05.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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43
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Mom RV, Falling LJ, Kasian O, Algara-Siller G, Teschner D, Crabtree RH, Knop-Gericke A, Mayrhofer KJJ, Velasco-Vélez JJ, Jones TE. Operando Structure–Activity–Stability Relationship of Iridium Oxides during the Oxygen Evolution Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05951] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rik V. Mom
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
| | - Lorenz J. Falling
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Olga Kasian
- Helmholtz-Zentrum Berlin GmbH, Helmholtz Institute Erlangen-Nürnberg, 14109 Berlin, Germany
- Max Planck Institute for Iron Research, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Gerardo Algara-Siller
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Detre Teschner
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45413 Mülheim an der Ruhr, Germany
| | - Robert H. Crabtree
- Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
| | - Axel Knop-Gericke
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45413 Mülheim an der Ruhr, Germany
| | - Karl J. J. Mayrhofer
- Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | | | - Travis E. Jones
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
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Chang TE, Chuang CH, Chen YH, Wang YC, Gu YJ, Kung CW. Iridium‐functionalized metal–organic framework nanocrystals interconnected by carbon nanotubes competent for electrocatalytic water oxidation. ChemCatChem 2022. [DOI: 10.1002/cctc.202200199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tzu-En Chang
- National Cheng Kung University Department of Chemical Engineering 1 University Road Tainan City TAIWAN
| | - Cheng-Hsun Chuang
- National Cheng Kung University Department of Chemical Engineering 1 University Road Tainan City TAIWAN
| | - Yu-Hsiu Chen
- National Cheng Kung University Department of Chemical Engineering 1 University Road Tainan City TAIWAN
| | - Yi-Ching Wang
- National Cheng Kung University Department of Chemical Engineering 1 University Road Tainan City TAIWAN
| | - Yu-Juan Gu
- National Cheng Kung University Department of Chemical Engineering 1 University Road Tainan City TAIWAN
| | - Chung-Wei Kung
- National Cheng Kung University Department of Chemical Engineering 1 University Road 70101 Tainan TAIWAN
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Visible light-driven efficient palladium catalyst turnover in oxidative transformations within confined frameworks. Nat Commun 2022; 13:928. [PMID: 35177599 PMCID: PMC8854557 DOI: 10.1038/s41467-022-28474-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 01/07/2022] [Indexed: 11/08/2022] Open
Abstract
Palladium catalyst turnover by reoxidation of a low-valent Pd species dominates the proceeding of an efficient oxidative transformation, but the state-of-the-art catalysis approaches still have great challenges from the perspectives of high efficiency, atom-economy and environmental-friendliness. Herein, we report a new strategy for addressing Pd reoxidation problem by the fabrication of spatially proximate IrIII photocatalyst and PdII catalyst into metal-organic framework (MOF), affording MOFs based Pd/photoredox catalysts UiO-67-Ir-PdX2 (X = OAc, TFA), which are systematically evaluated using three representative Pd-catalyzed oxidation reactions. Owing to the stabilization of single-site Pd and Ir catalysts by MOFs framework as well as the proximity of them favoring fast electron transfer, UiO-67-Ir-PdX2, under visible light, exhibits up to 25 times of Pd catalyst turnover number than the existing catalysis systems. Mechanism investigations theoretically corroborate the capability of MOFs based Pd/photoredox catalysis to regulate the competitive processes of Pd0 aggregation and reoxidation in Pd-catalyzed oxidation reactions.
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46
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Noble metal alloy thin films by atomic layer deposition and rapid Joule heating. Sci Rep 2022; 12:2522. [PMID: 35169249 PMCID: PMC8847586 DOI: 10.1038/s41598-022-06595-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 01/25/2022] [Indexed: 01/23/2023] Open
Abstract
Metal alloys are usually fabricated by melting constituent metals together or sintering metal alloy particles made by high energy ball milling (mechanical alloying). All these methods only allow for bulk alloys to be formed. This manuscript details a new method of fabricating Rhodium–Iridium (Rh–Ir) metal alloy films using atomic layer deposition (ALD) and rapid Joule heating induced alloying that gives functional thin film alloys, enabling conformal thin films with high aspect ratios on 3D nanostructured substrate. In this work, ALD was used to deposit Rh thin film on an Al2O3 substrate, followed by an Ir overlayer on top of the Rh film. The multilayered structure was then alloyed/sintered using rapid Joule heating. We can precisely control the thickness of the resultant alloy films down to the atomic scale. The Rh–Ir alloy thin films were characterized using scanning and transmission electron microscopy (SEM/TEM) and energy dispersive spectroscopy (EDS) to study their microstructural characteristics which showed the morphology difference before and after rapid Joule heating and confirmed the interdiffusion between Rh and Ir during rapid Joule heating. The diffraction peak shift was observed by Grazing-incidence X-ray diffraction (GIXRD) indicating the formation of Rh–Ir thin film alloys after rapid Joule heating. X-ray photoelectron spectroscopy (XPS) was also carried out and implied the formation of Rh–Ir alloy. Molecular dynamics simulation experiments of Rh–Ir alloys using Large-Scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) were performed to elucidate the alloying mechanism during the rapid heating process, corroborating the experimental results.
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Alwin E, Wojcieszak R, Kočí K, Edelmannová M, Zieliński M, Suchora A, Pędziński T, Pietrowski M. Reductive Modification of Carbon Nitride Structure by Metals-The Influence on Structure and Photocatalytic Hydrogen Evolution. MATERIALS 2022; 15:ma15030710. [PMID: 35160664 PMCID: PMC8836795 DOI: 10.3390/ma15030710] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/13/2022] [Accepted: 01/14/2022] [Indexed: 01/27/2023]
Abstract
Pt, Ru, and Ir were introduced onto the surface of graphitic carbon nitride (g-C3N4) using the wet impregnation method. A reduction of these photocatalysts with hydrogen causes several changes, such as a significant increase in the specific surface area, a C/N atomic ratio, a number of defects in the crystalline structure of g-C3N4, and the contribution of nitrogen bound to the amino and imino groups. According to the X-ray photoelectron spectroscopy results, a transition layer is formed at the g-C3N4/metal nanoparticle interphase, which contains metal at a positive degree of oxidation bonded to nitrogen. These structural changes significantly enhanced the photocatalytic activity in the production of hydrogen through the water-splitting reaction. The activity of the platinum photocatalyst was 24 times greater than that of pristine g-C3N4. Moreover, the enhanced activity was attributed to significantly better separation of photogenerated electron-hole pairs on metal nanoparticles and structural distortions of g-C3N4.
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Affiliation(s)
- Emilia Alwin
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland; (E.A.); (M.Z.); (A.S.); (T.P.)
| | - Robert Wojcieszak
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France;
| | - Kamila Kočí
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. listopadu 15/2172, 70800 Ostrava-Poruba, Czech Republic; (K.K.); (M.E.)
| | - Miroslava Edelmannová
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. listopadu 15/2172, 70800 Ostrava-Poruba, Czech Republic; (K.K.); (M.E.)
| | - Michał Zieliński
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland; (E.A.); (M.Z.); (A.S.); (T.P.)
| | - Agata Suchora
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland; (E.A.); (M.Z.); (A.S.); (T.P.)
| | - Tomasz Pędziński
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland; (E.A.); (M.Z.); (A.S.); (T.P.)
- Centre for Advanced Technologies, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland
| | - Mariusz Pietrowski
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland; (E.A.); (M.Z.); (A.S.); (T.P.)
- Correspondence:
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48
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Cha JI, Baik C, Lee SW, Pak C. Improved utilization of IrOx on Ti4O7 supports in Membrane Electrode Assembly for Polymer Electrolyte Membrane Water Electrolyzer. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Joo J, Park Y, Kim J, Kwon T, Jun M, Ahn D, Baik H, Jang JH, Kim JY, Lee K. Mn-Dopant Differentiating the Ru and Ir Oxidation States in Catalytic Oxides Toward Durable Oxygen Evolution Reaction in Acidic Electrolyte. SMALL METHODS 2022; 6:e2101236. [PMID: 35041273 DOI: 10.1002/smtd.202101236] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Indexed: 06/14/2023]
Abstract
Designing an efficient and durable electrocatalyst for the sluggish oxygen evolution reaction (OER) at the anode remains the foremost challenge in developing proton exchange membrane (PEM) electrolyzers. Here, a highly active and durable cactus-like nanoparticle with an exposed heterointerface between the IrO2 and the low oxidation state Ru by introducing a trace amount of Mn dopant is reported. The heterostructure fabrication relies on initial mixing of the Ru and Ir phases before electrochemical oxidation to produce a conjoined Ru/IrO2 heterointerface. Benefitting from electron transfer at the heterointerface, the low oxidation state Ru species shows excellent initial activity, which is maintained even after 180 h of continuous OER test. In a half-cell test, the Mn-doped RuIr nanocactus (Mn-RuIr NCT) achieves a mass activity of 1.85 A mgIr+Ru -1 at 1.48 VRHE , which is 139-fold higher than that of commercial IrO2 . Moreover, the superior electrocatalytic performance of Mn-RuIr NCT in the PEM electrolysis system ensures its viability in practical uses. The results of the excellent catalytic performance for acidic OER indicate that the heterostructuring robust rutile IrO2 and the highly active Ru species with a low oxidation state on the catalyst surface drive a synergistic effect.
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Affiliation(s)
- Jinwhan Joo
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - YeJi Park
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Jun Kim
- Center for Hydrogen & Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Taehyun Kwon
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Minki Jun
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Docheon Ahn
- Beamline Department, Pohang Accelerator Laboratory, Pohang, 37673, Republic of Korea
| | - Hionsuck Baik
- Korea Basic Science Institute (KBSI), Seoul, 02841, Republic of Korea
| | - Jong Hyun Jang
- Center for Hydrogen & Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Jin Young Kim
- Center for Hydrogen & Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Kwangyeol Lee
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
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50
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Hayashi K, Kusunoki K, Tomimori T, Sato R, Todoroki N, Wadayama T. Hydrogen Peroxide Generation and Hydrogen Oxidation Reactions of Vacuum-prepared Ru/Ir(111) Bimetallic Surfaces. Phys Chem Chem Phys 2022; 24:14277-14283. [DOI: 10.1039/d2cp01261h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
From the viewpoint of the application of Ir-Ru alloys for anode of proton exchange membrane fuel cells (PEMFCs), hydrogen peroxide (H2O2) generation and the hydrogen oxidation reaction (HOR) properties of...
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