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Hu X, Yang Y, Li N, Huang C, Zhou Y, Zhang L, Zhong Y, Liu Y, Wang Y. Interface-regulated S-type core-shell PCN-224@TiO 2 heterojunction for visible-light-driven generation of singlet oxygen for selective photooxidation of 2-chloroethyl ethyl sulfide. J Colloid Interface Sci 2024; 674:791-804. [PMID: 38955010 DOI: 10.1016/j.jcis.2024.06.205] [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: 05/20/2024] [Revised: 06/22/2024] [Accepted: 06/26/2024] [Indexed: 07/04/2024]
Abstract
Selective oxidation of sulfur mustard gas (HD) to non-toxic sulfoxide by the visible-light-catalyzed generation of singlet oxygen (1O2) is a promising degradation strategy. Although PCN-224 can absorb visible light, it suffers from rapid electron-hole recombination and low redox capacity, which limits the performance of HD degradation. Titanium dioxide (TiO2) is an excellent photocatalyst but it lacks visible-light-activity in degrading HD. In this study, PCN-224@TiO2 heterojunction with S-type core-shell structure was synthesized by in-situ growth method to prolong the visible light absorption capacity of TiO2 and inhibit the rapid recombination of PCN-224. The interface formation and internal electric field were optimized by adjusting the Zr/Ti ratio to enhance the charge transfer, redox capacity, electron-hole separation, and visible light absorption. In this study, the formation of heterojunction composites based on Zr-O-Ti linkages is demonstrated by a series of characterization methods. It is demonstrated by experiments and theoretical calculations that PCN-224@TiO2 can generate nearly 100 % 1O2 under visible light conditions without a sacrificial agent, resulting in efficient and selective oxidation of 2-chloroethyl ethyl sulfide (CEES), a simulant of HD, to non-toxic sulfoxide form.
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Affiliation(s)
- Xin Hu
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China; Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, PR China
| | - Ying Yang
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Nan Li
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Chengcheng Huang
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Yunshan Zhou
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Lijuan Zhang
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Yuxu Zhong
- Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, PR China.
| | - Yanqin Liu
- Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, PR China
| | - Yao Wang
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China
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2
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Li H, Zhang J, Deng X, Wang Y, Meng G, Liu R, Huang J, Tu M, Xu C, Peng Y, Wang B, Hou Y. Structure and Defect Engineering Synergistically Boost High Solar-to-Chemical Conversion Efficiency of Cerium oxide/Au Hollow Nanomushrooms for Nitrogen Photofixation. Angew Chem Int Ed Engl 2024; 63:e202316384. [PMID: 38009454 DOI: 10.1002/anie.202316384] [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: 10/30/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 11/28/2023]
Abstract
Photocatalytic nitrogen fixation using solar illumination under ambient conditions is a promising strategy for production of the indispensable chemical NH3 . However, due to the catalyst's limitations in solar energy utilization, loss of hot electrons during transfer, and low nitrogen adsorption and activation capacity, the unsatisfactory solar-to-chemical conversion (SCC) efficiencies of most photocatalysts limit their practical applications. Herein, cerium oxide nanosheets with abundant strain-VO defects were anchored on Au hollow nanomushroom through atomically sharp interfaces to construct a novel semiconductor/plasmonic metal hollow nanomushroom-like heterostructure (denoted cerium oxide-AD/Au). Plasmonic Au extended the absorption of light from the visible to the second near-infrared region. The superior interface greatly enhanced the transfer efficiency of hot electrons. Abundant strain-VO defects induced by interfacial compressive strain promoted adsorption and in situ activation of nitrogen, and such synergistic promotion of strain and VO defects was further confirmed by density functional theory calculations. The judicious structural and defect engineering co-promoted the efficient nitrogen photofixation of the cerium oxide-AD/Au heterostructures with a SCC efficiency of 0.1 % under simulated AM 1.5G solar illumination, which is comparable to the average solar-to-biomass conversion efficiency of natural photosynthesis by typical plants, thus exhibiting significant potential as a new candidate for artificial photosynthesis.
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Affiliation(s)
- Hua Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China
- School of Materials and Energy, Electron Microscopy Centre, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Junwei Zhang
- School of Materials and Energy, Electron Microscopy Centre, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Xia Deng
- School of Materials and Energy, Electron Microscopy Centre, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Yantao Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Genping Meng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Ruitong Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Junfeng Huang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Mudong Tu
- School of Materials and Energy, Electron Microscopy Centre, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Cailing Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Yong Peng
- School of Materials and Energy, Electron Microscopy Centre, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Baodui Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China
| | - Yanglong Hou
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKLMMD), School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- School of Materials, Sun Yat-Sen University, Shenzhen, 518107, China
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3
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Cao S, Zhu Z, Zhang W, Xia H, Zeng Y, Yuan S, Ge X, Lv Z, Wei J, Liu L, Du Y, Xi S, Loh XJ, Chen X. Boosting Solid-State Reconversion Reactivity to Mitigate Lithium Trapping for High Initial Coulombic Efficiency. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2304900. [PMID: 37549425 DOI: 10.1002/adma.202304900] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/11/2023] [Indexed: 08/09/2023]
Abstract
An initial Coulombic efficiency (ICE) higher than 90% is crucial for industrial lithium-ion batteries, but numerous electrode materials are not standards compliant. Lithium trapping, due to i) incomplete solid-state reaction of Li+ generation and ii) sluggish Li+ diffusion, undermines ICE in high-capacity electrodes (e.g., conversion-type electrodes). Current approaches mitigating lithium trapping emphasize ii) nanoscaling (<50 nm) to minimize Li+ diffusion distance, followed by severe solid electrolyte interphase formation and inferior volumetric energy density. Herein, this work accentuates i) instead, to demonstrate that the lithium trapping can be mitigated by boosting the solid-state reaction reactivity. As a proof-of-concept, ternary LiFeO2 anodes, whose discharged products contain highly reactive vacancy-rich Fe nanoparticles, can alleviate lithium trapping and enable a remarkable average ICE of ≈92.77%, much higher than binary Fe2 O3 anodes (≈75.19%). Synchrotron-based techniques and theoretical simulations reveal that the solid-state reconversion reaction for Li+ generation between Fe and Li2 O can be effectively promoted by the Fe-vacancy-rich local chemical environment. The superior ICE is further demonstrated by assembled pouch cells. This work proposes a novel paradigm of regulating intrinsic solid-state chemistry to ameliorate electrochemical performance and facilitate industrial applications of various advanced electrode materials.
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Affiliation(s)
- Shengkai Cao
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Singapore
| | - Zhiqiang Zhu
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wei Zhang
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Huarong Xia
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yi Zeng
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Song Yuan
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xiang Ge
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zhisheng Lv
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Singapore
| | - Jiaqi Wei
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Lin Liu
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yonghua Du
- National Synchrotron Light Source II, Brookhaven National Laboratory Upton NY, Upton, 11973, USA
| | - Shibo Xi
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Xiaodong Chen
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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4
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Interfacial regulation of freestanding TiO2/C composite nanofibers for fast sodium storage. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Feng M, Huang J, Peng Y, Huang C, Yue X, Huang S. Tuning Electronic Structures of Transition Metal Carbides to Boost Oxygen Evolution Reactions in Acidic Medium. ACS NANO 2022; 16:13834-13844. [PMID: 35997614 DOI: 10.1021/acsnano.2c02099] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Developing low-cost, efficient, and robust nonprecious metal electrocatalysts for oxygen evolution reactions (OER) in acidic medium is the major challenge to realize the application of the proton exchange membrane water electrolyzer (PEM-WE). It is well-known that transition metal carbides (TMCs) have Pt-like electronic structures and catalytic behaviors. However, monometallic carbides in acidic medium show ignored OER activities. Herein, we reported that the catalytic activity of the TMCs can be enhanced by constructing bimetallic carbides (TiTaC2) fabricated through hydrothermal treatment followed by an annealing process, and further by doping fluorine (F) into the bimetallic carbides (TiTaFxC2). The as-prepared reduced graphene oxide (rGO) supported TiTaFxC2 nanoparticles (TiTaFxC2 NP/rGO) show state-of-the-art OER catalytic activity, which is even superior to Ir/C catalyst (an onset potential of only 1.42 V vs RHE and the overpotential of 490 mV to reach 100 mA cm-2), fast kinetics (Tafel slope of only 36 mV dec-1), and high durability (maintaining the current density at 1.60 V vs RHE for 40 h). Detailed structural characterizations together with density functional theory (DFT) calculations reveal that the electronic structures of the bimetallic carbides have been tuned, and their possible mechanism is also discussed.
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Affiliation(s)
- Min Feng
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Jingle Huang
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Yang Peng
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Churong Huang
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Xin Yue
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Shaoming Huang
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China
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6
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Strain-regulated Gibbs free energy enables reversible redox chemistry of chalcogenides for sodium ion batteries. Nat Commun 2022; 13:5588. [PMID: 36151139 PMCID: PMC9508189 DOI: 10.1038/s41467-022-33329-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 09/13/2022] [Indexed: 11/09/2022] Open
Abstract
Manipulating the reversible redox chemistry of transition metal dichalcogenides for energy storage often faces great challenges as it is difficult to regulate the discharged products directly. Herein we report that tensile-strained MoSe2 (TS-MoSe2) can act as a host to transfer its strain to corresponding discharged product Mo, thus contributing to the regulation of Gibbs free energy change (ΔG) and enabling a reversible sodium storage mechanism. The inherited strain results in lattice distortion of Mo, which adjusts the d-band center upshifted closer to the Fermi level to enhance the adsorbability of Na2Se, thereby leading to a decreased ΔG of the redox chemistry between Mo/Na2Se and MoSe2. Ex situ and in situ experiments revealed that, unlike the unstrained MoSe2, TS-MoSe2 shows a highly reversible sodium storage, along with an evidently improved reaction kinetics. This work sheds light on the study on electrochemical energy storage mechanism of other electrode materials. Manipulating the redox chemistry of transition metal dichalcogenides still faces challenges. Here the authors report that tensile-strained MoSe2 can pass on the strain to its sodiated product Mo, and thus regulate the Gibbs free energy in the charging process to enable the reversible sodium storage.
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7
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Yan L, Qin J, Liang B, Gao S, Wang B, Cui J, Bolag A, Yang Y. High Pressure Rapid Synthesis of LiCrTiO 4 with Oxygen Vacancy for High Rate Lithium-Ion Battery Anodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2202901. [PMID: 35931464 DOI: 10.1002/smll.202202901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Lithium-ion battery based on LiCrTiO4 (LCTO) is considered to be a promising anode material, as they provide higher safety and durability beyond than that of graphite electrode. However, the applications of this transformative technology demand improved inherent electrical conductivity of LCTO as well as a simple and rapid synthetic route. Here, LCTO with oxygen vacancies (OVs) is fabricated using high-pressure synthesis technology in only 40 min. The optimal synthesis pressure is 0.8 GPa (LCTO-0.8). The reversible capacity of LCTO-0.8 at 1C is 131 mA h g-1 after 1000 cycles and the capacity retention is nearly 97%, and the reversible capacity of LCTO synthesized at atmospheric pressure (LCTO-P) is 85 mA h g-1 under the same circumstances. Even at 5C, the reversible capacity is 110 mA h g-1 , which is 77% higher than LCTO-P. Furthermore, it is confirmed by theoretical calculations that the introduction of OVs has the occupation of electronic states at the Fermi level, which greatly enhances the intrinsic conductivity of LCTO. Specifically, the electronic conductivity has increased by two orders of magnitude compared with LCTO-P. Therefore, high-pressure synthesis technology endows LCTO with superior characteristics, providing a new avenue for industrialization.
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Affiliation(s)
- Lv Yan
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Jieming Qin
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Benkuan Liang
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Shanlin Gao
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Bo Wang
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Jiuyue Cui
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Altan Bolag
- School of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot, 010022, P. R. China
| | - Yanchun Yang
- School of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot, 010022, P. R. China
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8
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Wang J, Guo RT, Bi ZX, Chen X, Hu X, Pan WG. A review on TiO 2-x-based materials for photocatalytic CO 2 reduction. NANOSCALE 2022; 14:11512-11528. [PMID: 35917276 DOI: 10.1039/d2nr02527b] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Photocatalytic CO2 reduction technology has a broad potential for dealing with the issues of energy shortage and global warming. As a widely studied material used in the photocatalytic process, titanium dioxide (TiO2) has been continuously modified and tailored for more desirable application. Recently, the defective/reduced titanium dioxide (TiO2-x) catalyst has attracted broad attention due to its excellent photocatalytic performance for CO2 reduction. In this perspective review, we comprehensively present the recent progress in TiO2-x-based materials for photocatalytic CO2 reduction. In detail, the review starts with the fundamentals of CO2 photocatalytic reduction. Then, the synthesis of a defective TiO2 structure is introduced for the regulation of its photocatalytic performance, especially its optical properties and dissociative adsorption properties. In addition, the current application of TiO2-x-based photocatalysts for CO2 reduction is also highlighted, such as metal-TiO2-x, oxide-TiO2-x and TiO2-x-carbon-based photocatalysts. Finally, the existing challenges and possible scope of photocatalytic CO2 reduction over TiO2-x-based materials are discussed. We hope that this review can provide an effective reference for the development of more efficient and reasonable photocatalysts based on TiO2-x.
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Affiliation(s)
- Juan Wang
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China.
| | - Rui-Tang Guo
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China.
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, China
| | - Zhe-Xu Bi
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China.
| | - Xin Chen
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China.
| | - Xing Hu
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China.
| | - Wei-Guo Pan
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China.
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, China
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9
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Miao Y, Zhao Y, Zhang S, Shi R, Zhang T. Strain Engineering: A Boosting Strategy for Photocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200868. [PMID: 35304927 DOI: 10.1002/adma.202200868] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Whilst the photocatalytic technique is considered to be one of the most significant routes to address the energy crisis and global environmental challenges, the solar-to-chemical conversion efficiency is still far from satisfying practical industrial requirements, which can be traced to the suboptimal bandgap and electronic structure of photocatalysts. Strain engineering is a universal scheme that can finely tailor the bandgap and electronic structure of materials, hence supplying a novel avenue to boost their photocatalytic performance. Accordingly, to explore promising directions for certain breakthroughs in strained photocatalysts, an overview on the recent advances of strain engineering from the basics of strain effect, creations of strained materials, as well as characterizations and simulations of strain level is provided. Besides, the potential applications of strain engineering in photocatalysis are summarized, and a vision for the future controllable-electronic-structure photocatalysts by strain engineering is also given. Finally, perspectives on the challenges for future strain-promoted photocatalysis are discussed, placing emphasis on the creation and decoupling of strain effect, and the modification of theoretical frameworks.
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Affiliation(s)
- Yingxuan Miao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yunxuan Zhao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Shuai Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Run Shi
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Tierui Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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10
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Li Y, Ma J, Wu Z, Wang Z. Direct Electron Transfer Coordinated by Oxygen Vacancies Boosts Selective Nitrate Reduction to N 2 on a Co-CuO x Electroactive Filter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:8673-8681. [PMID: 35575637 DOI: 10.1021/acs.est.1c05841] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Atomic hydrogen (H*) is used as an important mediator for electrochemical nitrate reduction; however, the Faradaic efficiency (FE) and selective reduction to N2 are likely compromised due to the side reactions (e.g., ammonia generation and hydrogen evolution reactions). This work reports a Co-CuOx electrochemical filter with CoOx nanoclusters rooted on vertically aligned CuOx nanowalls for selective nitrate reduction to N2, utilizing the direct electron transfer between oxygen vacancies and nitrate to suppress the contribution by H*. At a cathodic potential of -1.1 V (vs Ag/AgCl), the Co-CuOx filter showed 95.2% nitrate removal and 96.0% N2 selectivity at an influent nitrate concentration of 20 N-mg L-1. Meanwhile, the energy consumption and FE were 0.60 kW h m-3 and 53.5%, respectively, at a permeate flux of 60 L m-2 h-1. The presence of abundant oxygen vacancies on Co-CuOx was due to the change in the electron density of the Cu atom and a decrease of the coordination numbers of Cu-O via cobalt doping. Theoretical calculations and electrochemical tests showed that the oxygen vacancies coordinated nitrate adsorption and subsequent reduction reactions, thus suppressing the contribution of H* to nitrate reduction and leading to a thermodynamically favorable process to N2 via direct electron transfer.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
- Tongji Advanced Membrane Technology Center, Shanghai 200092, China
| | - Jinxing Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhichao Wu
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
- Tongji Advanced Membrane Technology Center, Shanghai 200092, China
| | - Zhiwei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
- Tongji Advanced Membrane Technology Center, Shanghai 200092, China
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11
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Zheng X, S Mofarah S, Cen A, Cazorla C, Haque E, Chen EY, Atanacio AJ, Manohar M, Vutukuri C, Abraham JL, Koshy P, Sorrell CC. Role of Oxygen Vacancy Ordering and Channel Formation in Tuning Intercalation Pseudocapacitance in Mo Single-Ion-Implanted CeO 2-x Nanoflakes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59820-59833. [PMID: 34875170 DOI: 10.1021/acsami.1c14484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal oxide pseudocapacitors are limited by low electrical and ionic conductivities. The present work integrates defect engineering and architectural design to exhibit, for the first time, intercalation pseudocapacitance in CeO2-x. An engineered chronoamperometric electrochemical deposition is used to synthesize 2D CeO2-x nanoflakes as thin as ∼12 nm. Through simultaneous regulation of intrinsic and extrinsic defect concentrations, charge transfer and charge-discharge kinetics with redox and intercalation capacitances together are optimized, where reduction increases the gravimetric capacitance by 77% to 583 F g-1, exceeding the theoretical capacitance (562 F g-1). Mo ion implantation and reduction processes increase the specific capacitance by 133%, while the capacitance retention increases from 89 to 95%. The role of ion-implanted Mo6+ is critical through its interstitial solid solubility, which is not to alter the energy band diagram but to facilitate the generation of electrons and to establish the midgap states for color centers, which facilitate electron transfer across the band gap, thus enhancing n-type semiconductivity. Critically, density functional theory simulations reveal, for the first time, that the reduction causes the formation of ordered oxygen vacancies that provide an atomic channel for ion intercalation. These channels enable intercalation pseudocapacitance but also increase electrical and ionic conductivities. In addition, the associated increased active site density enhances the redox such that the 10% of the Ce3+ available for redox (surface only) increases to 35% by oxygen vacancy channels. These findings are critical for any oxide system used for energy storage systems, as they offer both architectural design and structural engineering of materials to maximize the capacitance performance by achieving accumulative surface redox and intercalation-based redox reactions during the charge/discharge process.
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Affiliation(s)
- Xiaoran Zheng
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Sajjad S Mofarah
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Alan Cen
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Claudio Cazorla
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Enamul Haque
- EH Solid State Physics Laboratory, Gaffargaon, Mymensingh 2233, Bangladesh
| | - Ewing Y Chen
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Armand J Atanacio
- Centre for Accelerator Science, Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights, New South Wales 2234, Australia
| | - Madhura Manohar
- Centre for Accelerator Science, Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights, New South Wales 2234, Australia
| | - Corey Vutukuri
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Joel Luke Abraham
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Pramod Koshy
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Charles C Sorrell
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
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12
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Chen Q, Ma C, Yan S, Liang J, Dong K, Luo Y, Liu Q, Li T, Wang Y, Yue L, Zheng B, Liu Y, Gao S, Jiang Z, Li W, Sun X. Greatly Facilitated Two-Electron Electroreduction of Oxygen into Hydrogen Peroxide over TiO 2 by Mn Doping. ACS APPLIED MATERIALS & INTERFACES 2021; 13:46659-46664. [PMID: 34569784 DOI: 10.1021/acsami.1c13307] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ambient electrochemical oxygen reduction into valuable hydrogen peroxide (H2O2) via a selective two-electron (2e-) pathway is regarded as a sustainable alternative to the industrial anthraquinone process, but it requires advanced electrocatalysts with high activity and selectivity. In this study, we report that Mn-doped TiO2 behaves as an efficient electrocatalyst toward highly selective H2O2 synthesis. This catalyst exhibits markedly enhanced 2e- oxygen reduction reaction performance with a low onset potential of 0.78 V and a high H2O2 selectivity of 92.7%, much superior to the pristine TiO2 (0.64 V, 62.2%). Additionally, it demonstrates a much improved H2O2 yield of up to 205 ppm h-1 with good stability during bulk electrolysis in an H-cell device. The significantly boosted catalytic performance is ascribed to the lattice distortion of Mn-doped TiO2 with a large amount of oxygen vacancies and Ti3+. Density functional theory calculations reveal that Mn dopant improves the electrical conductivity and reduces ΔG*OOH of pristine TiO2, thus giving rise to a highly efficient H2O2 production process.
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Affiliation(s)
- Quanying Chen
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Chaoqun Ma
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong 266109, China
| | - Shihai Yan
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong 266109, China
| | - Jie Liang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Kai Dong
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Yonglan Luo
- Institute for Advanced Study, Chengdu University, Chengdu, Sichuan 610106, China
| | - Qian Liu
- Institute for Advanced Study, Chengdu University, Chengdu, Sichuan 610106, China
| | - Tingshuai Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Yan Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Luchao Yue
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Baozhan Zheng
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Yang Liu
- School of Materials Science and Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Shuyan Gao
- School of Materials Science and Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhenju Jiang
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Wei Li
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Xuping Sun
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
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13
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Sun Y, Yang J, Li S, Wang D. Defect engineering in perovskite oxide thin films. Chem Commun (Camb) 2021; 57:8402-8420. [PMID: 34351323 DOI: 10.1039/d1cc02276h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Perovskite oxide thin films are a category of multifunctional materials that have intriguing electrical, magnetic, and photovoltaic properties that can be harnessed combinatorially in future microelectronic devices. However, the inevitable existence of defects in perovskites, regardless of the materials' processing conditions, plays a significant role in their functional properties, which could be either detrimental or beneficial, depending on the exact chemical nature of these defects. As such, defect engineering is an important research area in perovskite thin films that aims at understanding the chemical nature of the defects, from which the physical properties of materials can be more precisely manipulated. Here, we review the common defects in perovskite oxide thin films, which include point defects, dopants, domains and domain walls. The factors that impact the appearance and existence of defects and the corresponding mechanisms are also discussed. While summarizing our previous work, the state-of-the-art in the field from other groups has also been discussed. Most of the defects exist as defect dipoles that affect the oxidation states of relevant ions and induce anomalous behaviors, such as ferroelectricity in otherwise non-ferroelectric thin films, as well as enhanced electrical conductivity in insulators. Furthermore, the couplings between defect dipoles and other degrees of freedom including epitaxial strains and interfaces also provide new strategies to modulate the functional properties of perovskite thin films. Particularly, the coupling between defects and domain wall motion can be regarded as a universal tool to modulate the electric and magnetic properties of thin films of perovskite oxides. It is our hope that this review could promote defect engineering as a general regulation strategy to embellish the functional properties of perovskite oxide thin films.
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Affiliation(s)
- Yunlong Sun
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
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14
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Su R, Wang Z, Zhu L, Pan Y, Zhang D, Wen H, Luo ZD, Li L, Li FT, Wu M, He L, Sharma P, Seidel J. Strain-Engineered Nano-Ferroelectrics for High-Efficiency Piezocatalytic Overall Water Splitting. Angew Chem Int Ed Engl 2021; 60:16019-16026. [PMID: 33871146 DOI: 10.1002/anie.202103112] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/12/2021] [Indexed: 12/22/2022]
Abstract
Developing nano-ferroelectric materials with excellent piezoelectric performance for piezocatalysts used in water splitting is highly desired but also challenging, especially with respect to reaching large piezo-potentials that fully align with required redox levels. Herein, heteroepitaxial strain in BaTiO3 nanoparticles with a designed porous structure is successfully induced by engineering their surface reconstruction to dramatically enhance their piezoelectricity. The strain coherence can be maintained throughout the nanoparticle bulk, resulting in a significant increase of the BaTiO3 tetragonality and thus its piezoelectricity. Benefiting from high piezoelectricity, the as-synthesized blue-colored BaTiO3 nanoparticles possess a superb overall water-splitting activity, with H2 production rates of 159 μmol g-1 h-1 , which is almost 130 times higher than that of the pristine BaTiO3 nanoparticles. Thus, this work provides a generic approach for designing highly efficient piezoelectric nanomaterials by strain engineering that can be further extended to various other perovskite oxides, including SrTiO3 , thereby enhancing their potential for piezoelectric catalysis.
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Affiliation(s)
- Ran Su
- College of Science, Hebei University of Science and Technology, Shijiazhuang, 050018, China
| | - Zhipeng Wang
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Lina Zhu
- College of Science, Hebei University of Science and Technology, Shijiazhuang, 050018, China
| | - Ying Pan
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South, Wales, 2052, Australia
| | - Dawei Zhang
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South, Wales, 2052, Australia
| | - Hui Wen
- College of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China
| | - Zheng-Dong Luo
- Interuniversity Microelectronics Centre, Kapeldreef 75, 3001, Leuven, Belgium
| | - Linglong Li
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, China
| | - Fa-Tang Li
- College of Science, Hebei University of Science and Technology, Shijiazhuang, 050018, China
| | - Ming Wu
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Liqiang He
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Pankaj Sharma
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South, Wales, 2052, Australia
| | - Jan Seidel
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South, Wales, 2052, Australia
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15
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Su R, Wang Z, Zhu L, Pan Y, Zhang D, Wen H, Luo Z, Li L, Li F, Wu M, He L, Sharma P, Seidel J. Strain‐Engineered Nano‐Ferroelectrics for High‐Efficiency Piezocatalytic Overall Water Splitting. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103112] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ran Su
- College of Science Hebei University of Science and Technology Shijiazhuang 050018 China
| | - Zhipeng Wang
- Frontier Institute of Science and Technology State Key Laboratory for Mechanical behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
| | - Lina Zhu
- College of Science Hebei University of Science and Technology Shijiazhuang 050018 China
| | - Ying Pan
- School of Materials Science and Engineering University of New South Wales Sydney, New South Wales 2052 Australia
| | - Dawei Zhang
- School of Materials Science and Engineering University of New South Wales Sydney, New South Wales 2052 Australia
| | - Hui Wen
- College of Electrical Engineering Hebei University of Science and Technology Shijiazhuang 050018 China
| | - Zheng‐Dong Luo
- Interuniversity Microelectronics Centre Kapeldreef 75 3001 Leuven Belgium
| | - Linglong Li
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China
| | - Fa‐tang Li
- College of Science Hebei University of Science and Technology Shijiazhuang 050018 China
| | - Ming Wu
- Frontier Institute of Science and Technology State Key Laboratory for Mechanical behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
| | - Liqiang He
- Frontier Institute of Science and Technology State Key Laboratory for Mechanical behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
| | - Pankaj Sharma
- School of Materials Science and Engineering University of New South Wales Sydney, New South Wales 2052 Australia
| | - Jan Seidel
- School of Materials Science and Engineering University of New South Wales Sydney, New South Wales 2052 Australia
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16
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Li Z, Huang F, Xiong X, Yan A, Dong H, Xu Y, Gao Q. In Situ Corrosion Fabrication of NaNbO 3 /Nb 3 O 7 F Heterojunctions with Optimized Band Realignment for Enhanced Photocatalytic Hydrogen Evolution. Chemistry 2021; 27:4683-4690. [PMID: 33617102 DOI: 10.1002/chem.202004813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Indexed: 11/10/2022]
Abstract
Heterostructured photocatalysis is a significant issue owing to the unique band alignment, improved spectrum absorption, and enhanced photocatalytic activity. However, the construction of uniform, controllable, and effective heterojunctions is still a huge challenge. Herein, NaNbO3 /Nb3 O7 F heterojunctions are fabricated through an in situ corrosion technique for the first time. The influence of phase transformation on the hydrogen evolution reaction (HER) activity is investigated systematically in terms of photocatalytic water splitting for H2 production. Interestingly, the band realignment and good interfacial contact endow the NaNbO3 /Nb3 O7 F heterojunctions with a high HER activity (43.3 mmol g-1 h-1 ), which is about 2.4 times that of pure Nb3 O7 F and 1.36 times that of pure NaNbO3 . The results may provide some new insights into the corrosion technique and HER activity of novel heterostructured catalysts.
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Affiliation(s)
- Zhen Li
- Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, 221008, China.,School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Fei Huang
- Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, 221008, China.,School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Xin Xiong
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Aihua Yan
- Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, 221008, China
| | - Haiming Dong
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Yifeng Xu
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Qingyu Gao
- School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou, 221008, China
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17
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Yang X, Tong X, Liu X, Li K, Yang N. Methanol electrooxidation on core-shell Ag@Pd catalysts. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.106917] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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18
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Wu S, Manuputty MY, Sheng Y, Wang H, Yan Y, Kraft M, Xu R. Flame Synthesized Blue TiO 2- x with Tunable Oxygen Vacancies from Surface to Grain Boundary to Bulk. SMALL METHODS 2021; 5:e2000928. [PMID: 34927894 DOI: 10.1002/smtd.202000928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/29/2020] [Indexed: 05/27/2023]
Abstract
Fabrication of nonstoichiometric metal oxides containing oxygen vacancies (OVs) has been an effective strategy to modulate their (photo)catalytic or (photo)electrochemical performances which are all affected by charge transfer at the interface and in the bulk. Considerable efforts are still needed to achieve tunability of OVs, as well as their quantitative characterization. Herein, a one-step flame synthesis method is reported for the first time for fast fabrication of blue TiO2- x with controllable defect content and location. Temperature-programmed oxidation (TPO) analysis is applied for the first time and found to be an excellent technique in both differentiating and quantifying OVs at the surface, grain boundary (GB), and bulk of TiO2- x . The results indicate that a moderate level of OVs can greatly enhance the charge transfer. Importantly, the OVs locked at GBs due to the thermal sintering of nanoparticles during the synthesis can facilitate the anchoring and reduction of Pt species.
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Affiliation(s)
- Shuyang Wu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- C4T CREATE, National Research Foundation, CREATE Tower 1 Create Way, Singapore, 138602, Singapore
| | - Manoel Y Manuputty
- C4T CREATE, National Research Foundation, CREATE Tower 1 Create Way, Singapore, 138602, Singapore
- Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Yuan Sheng
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- C4T CREATE, National Research Foundation, CREATE Tower 1 Create Way, Singapore, 138602, Singapore
| | - Haojing Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yong Yan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- C4T CREATE, National Research Foundation, CREATE Tower 1 Create Way, Singapore, 138602, Singapore
| | - Markus Kraft
- C4T CREATE, National Research Foundation, CREATE Tower 1 Create Way, Singapore, 138602, Singapore
- Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Rong Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- C4T CREATE, National Research Foundation, CREATE Tower 1 Create Way, Singapore, 138602, Singapore
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19
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Tao Y, Wang P, Liang C, Yang N, Huang D, Chen H, Luo Y. Tailoring Oxygen Vacancies in CoMoO
4
for Superior Lithium Storage. ChemElectroChem 2020. [DOI: 10.1002/celc.202001379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yuanxue Tao
- College of Science Huazhong Agricultural University Wuhan 430070 PR China
| | - Pei Wang
- College of Science Huazhong Agricultural University Wuhan 430070 PR China
| | - Chennan Liang
- College of Science Huazhong Agricultural University Wuhan 430070 PR China
| | - Nan Yang
- College of Science Huazhong Agricultural University Wuhan 430070 PR China
| | - Dekang Huang
- College of Science Huazhong Agricultural University Wuhan 430070 PR China
| | - Hao Chen
- College of Science Huazhong Agricultural University Wuhan 430070 PR China
| | - Yanzhu Luo
- College of Science Huazhong Agricultural University Wuhan 430070 PR China
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20
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Ding W, Liu D, Liu J, Zhang J. Oxygen Defects in Nanostructured
Metal‐Oxide
Gas Sensors: Recent Advances and Challenges
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000341] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wenjie Ding
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 China
| | - Dandan Liu
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 China
| | - Jiajia Liu
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 China
| | - Jiatao Zhang
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 China
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21
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Deng Z, Ji J, Xing M, Zhang J. The role of oxygen defects in metal oxides for CO 2 reduction. NANOSCALE ADVANCES 2020; 2:4986-4995. [PMID: 36132043 PMCID: PMC9417885 DOI: 10.1039/d0na00535e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 08/22/2020] [Indexed: 06/14/2023]
Abstract
The abuse of fossil fuels release large amount of CO2, causing intense global warming. Using photoreduction and electroreduction to convert CO2 into highly valuable fuels such as CO and CH4 can effectively solve this problem. However, due to the limited activity and selectivity, pristine catalyst materials cannot meet the requirements of practical applications, which means that some modifications to these catalysts are necessary. In this review, a series of research reports on oxygen defect engineering have been introduced. First, the methods of preparing oxygen defects by heat treatment, doping, and photoinduction combined with influencing factors in the preparation are introduced. Subsequently, common characterization methods of oxygen defects including EPR, Raman, XPS, EXAFS, and HRTEM are summarized. Finally, the mechanisms of introducing oxygen defects to improve CO2 reduction are discussed, and include enhancing light absorption, improving CO2 adsorption and activation, as well as promoting stability of the reaction intermediates. The summary of research on oxygen defects provides guidance for researchers who focus on CO2 reduction and accelerate the realization of its industrial applications in the future.
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Affiliation(s)
- Zesheng Deng
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Jiahui Ji
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Mingyang Xing
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Jinlong Zhang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
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22
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Gao Y, Zheng F, Wang D, Wang B. Mechanoelectrochemical issues involved in current lithium-ion batteries. NANOSCALE 2020; 12:20100-20117. [PMID: 33020793 DOI: 10.1039/d0nr05414c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The volume change and concurrent stress evolution of electrode materials during the cycling of lithium-ion batteries can cause severe mechanical issues such as the fracture of active materials and electrodes, thus leading to safety issues and capacity fading. Recent years have witnessed a thriving interest to gain a complete understanding of battery electrode materials from the viewpoint of mechanics. This review paper aims at discussing battery electrode materials from a mechanical perspective to provide an overview of the recent innovative efforts in this field. On the one hand, we introduce the mechanical issues of active materials and electrodes in the electrochemical processes, along with a focus on the strategies developed for enhancing the mechanical strength of electrode materials and constructing mechanically robust electrodes. On the other hand, experimental and theoretical studies on the stress-regulated effects on electrochemical processes are discussed to demonstrate the intriguing role of mechanical stress as an enabler in electrochemistry. We also give an outlook on the promising research topics for understanding the material mechanical issues, reinforcing electrode materials and improving battery performance.
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Affiliation(s)
- Yang Gao
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P.R. China.
| | - Feng Zheng
- TBEA Co., Ltd., Changji, Xinjiang 831100, P.R. China
| | - Dajiang Wang
- TBEA Co., Ltd., Changji, Xinjiang 831100, P.R. China
| | - Bin Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P.R. China.
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23
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Photoreactivity of Deep VB Titania Attained Via Molecular Layer Deposition; Interplay of Metal Oxide Thin Film Built-in Strain and Molecular Effects. Top Catal 2020. [DOI: 10.1007/s11244-020-01390-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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24
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Liu Q, Zhan H, Nie Y, Xu Y, Zhu H, Sun Z, Bell J, Bo A, Gu Y. Effect of Fe-doping on bending elastic properties of single-crystalline rutile TiO 2 nanowires. NANOSCALE ADVANCES 2020; 2:2800-2807. [PMID: 36132379 PMCID: PMC9417917 DOI: 10.1039/d0na00284d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 05/16/2020] [Indexed: 06/15/2023]
Abstract
Transition-metal-doping can improve some physical properties of titanium dioxide (TiO2) nanowires (NWs), which leads to important applications in miniature devices. Here, we investigated the elastic moduli of single-crystalline pristine and Fe-doped rutile TiO2 NWs using the three-point bending method, which is taken as a case study of impacts on the elastic properties of TiO2 NWs caused by transition-metal-doping. The Young's modulus of the pristine rutile TiO2 NWs decreases when the cross-sectional area increases (changing from 246 GPa to 93.2 GPa). However, the elastic modulus of the Fe-doped rutile NWs was found to increase with the cross-sectional area (changing from 91.8 GPa to 200 GPa). For NWs with similar geometrical size, the elastic modulus (156.8 GPa) for Fe-doped rutile NWs is 24% smaller than that (194.5 GPa) of the pristine rutile TiO2 NWs. The vacancies generated by Fe-doping are supposed to cause the reduction of elastic modulus of rutile TiO2 NWs. This work provides a fundamental understanding of the effects of transition-metal-doping on the elastic properties of TiO2 NWs.
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Affiliation(s)
- Qiong Liu
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
| | - Haifei Zhan
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
- Center for Materials Science, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
| | - Yihan Nie
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
| | - Yanan Xu
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
| | - Huaiyong Zhu
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
| | - Ziqi Sun
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
| | - John Bell
- University of Southern Queensland Ipswich Queensland 4300 Australia
| | - Arinxin Bo
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
| | - Yuantong Gu
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
- Center for Materials Science, Queensland University of Technology (QUT) Brisbane Queensland 4001 Australia
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25
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Ge M, Tang Y, Malyi OI, Zhang Y, Zhu Z, Lv Z, Ge X, Xia H, Huang J, Lai Y, Chen X. Mechanically Reinforced Localized Structure Design to Stabilize Solid-Electrolyte Interface of the Composited Electrode of Si Nanoparticles and TiO 2 Nanotubes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002094. [PMID: 32529784 DOI: 10.1002/smll.202002094] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/20/2020] [Indexed: 06/11/2023]
Abstract
Silicon anode with extremely high theoretical specific capacity (≈4200 mAh g-1 ), experiences huge volume changes during Li-ion insertion and extraction, causing mechanical fracture of Si particles and the growth of a solid-electrolyte interface (SEI), which results in a rapid capacity fading of Si electrodes. Herein, a mechanically reinforced localized structure is designed for carbon-coated Si nanoparticles (C@Si) via elongated TiO2 nanotubes networks toward stabilizing Si electrode via alleviating mechanical strain and stabilizing the SEI layer. Benefited from the rational localized structure design, the carbon-coated Si nanoparticles/TiO2 nanotubes composited electrode (C@Si/TiNT) exhibits an ideal electrode thickness swelling, which is lower than 1% after the first cycle and increases to about 6.6% even after 1600 cycles. While for traditional C@Si/carbon nanotube composited electrode, the initial swelling ratio is about 16.7% and reaches ≈190% after 1600 cycles. As a result, the C@Si/TiNT electrode exhibits an outstanding capacity of 1510 mAh g-1 at 0.1 A g-1 with high rate capability and long-time cycling performance with 95% capacity retention after 1600 cycles. The rational design on mechanically reinforced localized structure for silicon electrode will provide a versatile platform to solve the current bottlenecks for other alloyed-type electrode materials with large volume expansion toward practical applications.
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Affiliation(s)
- Mingzheng Ge
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong, 226019, P. R. China
| | - Yuxin Tang
- Institute of Applied Physics and Materials Engineering, University of Macau, Macau, 999078, P. R. China
| | - Oleksandr I Malyi
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yanyan Zhang
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zhiqiang Zhu
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zhisheng Lv
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xiang Ge
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Huarong Xia
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jianying Huang
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Yuekun Lai
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Xiaodong Chen
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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26
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Wang Y, Zhang M, Lv S, Li X, Wang D, Song C. Photogenerated Oxygen Vacancies in Hierarchical Ag/TiO 2 Nanoflowers for Enhanced Photocatalytic Reactions. ACS OMEGA 2020; 5:13994-14005. [PMID: 32566866 PMCID: PMC7301581 DOI: 10.1021/acsomega.0c01390] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 05/22/2020] [Indexed: 05/06/2023]
Abstract
Oxygen vacancy (Vo) creation and morphology controlling make significant contributions to the electronic and structural regulation of metal oxide semiconductors, yet an investigation about convenient approaches for fabricating hierarchical catalyst with abundant oxygen vacancies still has significant challenges. Here, we report a unique method to create abundant oxygen vacancies in hierarchical Ag/TiO2 nanoflowers during photocatalytic reaction, which is accompanied by light absorption variation and surface plasmon resonance (SPR) enhancement. Its high efficiency of photocatalytic H2 evolution (the highest apparent quantum yield reaches 3.2% at 365 nm) and rhodamine B degradation can be considered as benefits from the synergistic effects of the well-arranged hierarchical structure, the photogenerated oxygen vacancies, and the SPR of cocatalyst Ag. This work proposes an effective strategy to optimize the synthesis of regular hierarchical structures and enriches the research on the vital function of oxygen vacancies in photocatalytic reactions.
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Affiliation(s)
- Ying Wang
- Key
Laboratory of Optic-electric Sensing and Analytical Chemistry for
Life Science (MOE), College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Miaomiao Zhang
- Key
Laboratory of Optic-electric Sensing and Analytical Chemistry for
Life Science (MOE), College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Shuhua Lv
- College
of Materials Science and Engineering, Qingdao
University of Science & Technology, Qingdao 266042, PR China
| | - Xiaoqian Li
- Key
Laboratory of Optic-electric Sensing and Analytical Chemistry for
Life Science (MOE), College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Debao Wang
- Key
Laboratory of Optic-electric Sensing and Analytical Chemistry for
Life Science (MOE), College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Caixia Song
- College
of Materials Science and Engineering, Qingdao
University of Science & Technology, Qingdao 266042, PR China
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27
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Hu Y, Li Y, Cheng J, Chen MS, Fu W, Liu B, Zhang M, Shen Z. Intercalation of Carbon Nanosheet into Layered TiO 2 Grain for Highly Interfacial Lithium Storage. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21709-21719. [PMID: 32320203 DOI: 10.1021/acsami.0c03775] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Interfacial energy storage contributes a new mechanism to the emergence of energy storage devices with not only a high-energy density of batteries but also a high-power density of capacitors. In this study, success was achieved in preparing a highly ordered two-dimensional (2D) carbon/TiO2 (C/TiO2) nanosheet composite using commercially available organic molecules with multifunctional groups and taking advantage of the wedge effects, oxidative polymerization, and carbonization. An experiment was conducted to validate the excellent performance of this 2D composite with respect to interfacial energy storage. The coin cell with 2D C/TiO2 nanosheet composite demonstrates a specific capacity of as high as 510 mAh g-1 and a high specific energy of 390.9 Wh kg-1 at a specific power of 75.9 W kg-1 with a current density of 0.1 A g-1, and it also remains 39.0 Wh kg-1 at a specific power of 8.2 kW kg-1 with a high current density of 12.8 A g-1. The excellent electrochemical performance can be attributed to the superior artificial interface capacitive Li+ storage capability, which would bridge the energy and power density gap between batteries and capacitors. Meanwhile, there are two varieties of carbon derivatives, 2D carbon nanosheet stacks and exfoliated carbon nanosheets, which can be obtained by wet-chemical etching and mechanical peeling. The experimental route is simple from commercially available raw materials, and it could be scalable at a low cost and large scale, which makes it suitable for application in various fields such as energy storage, nanocatalysis, sensors, and so on.
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Affiliation(s)
- Yanjie Hu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
- The Laboratory of Rare-Earth Functional Materials and Green Energy, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China
- School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, People's Republic of China
| | - Yaoting Li
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
- The Laboratory of Rare-Earth Functional Materials and Green Energy, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China
| | - Junfang Cheng
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Mao-Sung Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
- The Laboratory of Rare-Earth Functional Materials and Green Energy, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China
| | - Wenwu Fu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
- The Laboratory of Rare-Earth Functional Materials and Green Energy, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China
| | - Bingheng Liu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
- The Laboratory of Rare-Earth Functional Materials and Green Energy, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China
| | - Ming Zhang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
- The Laboratory of Rare-Earth Functional Materials and Green Energy, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China
| | - Zhongrong Shen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
- The Laboratory of Rare-Earth Functional Materials and Green Energy, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China
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28
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Zhang W, Sun Y, Deng H, Ma J, Zeng Y, Zhu Z, Lv Z, Xia H, Ge X, Cao S, Xiao Y, Xi S, Du Y, Cao A, Chen X. Dielectric Polarization in Inverse Spinel-Structured Mg 2 TiO 4 Coating to Suppress Oxygen Evolution of Li-Rich Cathode Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2000496. [PMID: 32239556 DOI: 10.1002/adma.202000496] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/19/2020] [Accepted: 03/03/2020] [Indexed: 06/11/2023]
Abstract
High-energy Li-rich layered cathode materials (≈900 Wh kg-1 ) suffer from severe capacity and voltage decay during cycling, which is associated with layered-to-spinel phase transition and oxygen redox reaction. Current efforts mainly focus on surface modification to suppress this unwanted structural transformation. However, the true challenge probably originates from the continuous oxygen release upon charging. Here, the usage of dielectric polarization in surface coating to suppress the oxygen evolution of Li-rich material is reported, using Mg2 TiO4 as a proof-of-concept material. The creation of a reverse electric field in surface layers effectively restrains the outward migration of bulk oxygen anions. Meanwhile, high oxygen-affinity elements of Mg and Ti well stabilize the surface oxygen of Li-rich material via enhancing the energy barrier for oxygen release reaction, verified by density functional theory simulation. Benefited from these, the modified Li-rich electrode exhibits an impressive cyclability with a high capacity retention of ≈81% even after 700 cycles at 2 C (≈0.5 A g-1 ), far superior to ≈44% of the unmodified counterpart. In addition, Mg2 TiO4 coating greatly mitigates the voltage decay of Li-rich material with the degradation rate reduced by ≈65%. This work proposes new insights into manipulating surface chemistry of electrode materials to control oxygen activity for high-energy-density rechargeable batteries.
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Affiliation(s)
- Wei Zhang
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yonggang Sun
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), and Beijing National Laboratory for Molecular Sciences (BNLMS), Beijing, 100190, China
| | - Huiqiu Deng
- School of Physics and Electronics, Hunan University, Changsha, 410082, China
| | - Jianming Ma
- School of Physics and Electronics, Hunan University, Changsha, 410082, China
| | - Yi Zeng
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zhiqiang Zhu
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zhisheng Lv
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Huarong Xia
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xiang Ge
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Shengkai Cao
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yao Xiao
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore, 627833, Singapore
| | - Yonghua Du
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Anmin Cao
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), and Beijing National Laboratory for Molecular Sciences (BNLMS), Beijing, 100190, China
| | - Xiaodong Chen
- Innovative Centre for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Singapore-HUJ Alliance for Research and Enterprise, Campus for Research Excellence and Technological Enterprise, Create Way 1, Singapore, 138602, Singapore
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