1
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Qiao Z, Jiang R, Xu H, Cao D, Zeng XC. A General Descriptor for Single-Atom Catalysts with Axial Ligands. Angew Chem Int Ed Engl 2024; 63:e202407812. [PMID: 38771728 DOI: 10.1002/anie.202407812] [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: 04/24/2024] [Revised: 05/16/2024] [Accepted: 05/21/2024] [Indexed: 05/23/2024]
Abstract
Decoration of an axial coordination ligand (ACL) on the active metal site is a highly effective and versatile strategy to tune activity of single-atom catalysts (SACs). However, the regulation mechanism of ACLs on SACs is still incompletely known. Herein, we investigate diversified combinations of ACL-SACs, including all 3d-5d transition metals and ten prototype ACLs. We identify that ACLs can weaken the adsorption capability of the metal atom (M) by raising the bonding energy levels of the M-O bond while enhancing dispersity of the d orbital of M. Through examination of various local configurations and intrinsic parameters of ACL-SACs, a general structure descriptor σ is constructed to quantify the structure-activity relationship of ACL-SACs which solely based on a few key intrinsic features. Importantly, we also identified the axial ligand descriptor σACL, as a part of σ, which can serve as a potential descriptor to determine the rate-limiting steps (RLS) of ACL-SACs in experiment. And we predicted several ACL-SACs, namely, CrN4-, FeN4-, CoN4-, RuN4-, RhN4-, OsN4-, IrN4- and PtN4-ACLs, that entail markedly higher activities than the benchmark catalysts of Pt and IrO2 for oxygen reduction reaction and oxygen evolution reaction, respectively, thereby supporting that the general descriptor σ can provide a simple and cost-effective method to assess efficient electrocatalysts.
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Affiliation(s)
- Zelong Qiao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Run Jiang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Haoxiang Xu
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Dapeng Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiao Cheng Zeng
- Department of Materials Science & Engineering, City University of Hong Kong, Kowloon, 99977, Hong Kong
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2
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Wu J, Wang H, Liu N, Jia B, Zheng J. High-Entropy Materials in Electrocatalysis: Understanding, Design, and Development. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403162. [PMID: 38934346 DOI: 10.1002/smll.202403162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 06/06/2024] [Indexed: 06/28/2024]
Abstract
Electrocatalysis is a crucial method for achieving global carbon neutrality, serving as an essential means of energy conversion, and electrocatalyst is crucial in the process of electrocatalysis. Because of the abundant active sites, the multi-component synergistic effect of high-entropy materials has a wide application prospect in the field of electrocatalysis. Moreover, due to the special structure of high-entropy materials, it is possible to obtain almost continuous adsorption energy distribution by regulating the composition, which has attracted extensive attention of researchers. This paper reviews the properties and types of high-entropy materials, including alloys and compounds. The synthesis strategies of high-entropy materials are systematically introduced, and the solid phase synthesis, liquid-phase synthesis, and gas-phase synthesis are classified and summarized. The application of high-entropy materials in electrocatalysis is summarized, and the promotion effect of high-entropy strategy in various catalytic reaction processes is summarized. Finally, the current progress of high-entropy materials, the problems encountered, and the future development direction are reviewed. It is emphasized that the strategy of high flux density functional theory calculation guiding high-entropy catalyst design will be of great significance to electrocatalysis.
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Affiliation(s)
- Jiwen Wu
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Huichao Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Naiyan Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Binbin Jia
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China
| | - Jinlong Zheng
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
- Shunde Innovation School, University of Science and Technology Beijing, Foshan, 528399, China
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3
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Gui R, Cheng H, Wang M, Tai X, Zhang H, Liu C, Cao X, Chen C, Ge M, Wang H, Zheng X, Chu W, Lin Y, Xie Y, Wu C. Symmetry-Induced Regulation of Pt Strain Derived from Pt 3 Ga Intermetallic for Boosting Oxygen Reduction Reaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2307661. [PMID: 37994613 DOI: 10.1002/adma.202307661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/19/2023] [Indexed: 11/24/2023]
Abstract
Pt-based fuel cell catalysts with excellent activity and stability for proton-exchange membrane fuel cells (PEMFCs) have been developed through strain regulation in recent years. Herein, this work demonstrates that symmetry-induced strain regulation of Pt surface of PtGa intermetallic compounds can greatly enhance the catalytic performance of the oxygen reduction reaction (ORR). With the strain environment varies derived from the lattice mismatch of analogous PtGa core but different symmetry, the Pt surface of the PtGa alloy and the Pt3 Ga (Pm3 ¯ $\bar{3}$ m) precisely realize 0.58% and 2.7% compressive strain compared to the Pt3 Ga (P4/mmm). Experimental and theoretical results reveal that when the compressive stress of the Pt lattice increases, the desorption process of O* intermediates becomes accelerated, which is conducive to oxygen reduction. The Pt3 Ga (Pm3 ¯ $\bar{3}$ m) with high symmetry and compressive Pt surface exhibit the highest mass and specific activities of 2.18 A mgPt -1 and 5.36 mA cm-2 , respectively, which are more than one order of magnitude higher than those of commercial Pt/C catalysts. This work demonstrates that material symmetry can be used to precisely modulate Pt surface stress to enhance the ORR, as well as provide a distinct platform to investigate the relationship between Pt compressibility and catalytic activity.
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Affiliation(s)
- Renjie Gui
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Han Cheng
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Minghao Wang
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xiaolin Tai
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Huijuan Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Congyan Liu
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xuemin Cao
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Chen Chen
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Min Ge
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Huijuan Wang
- Experimental Center of Engineering and Material Science, University of Science and Technology of China, Hefei, 230026, China
| | - Xusheng Zheng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Wangsheng Chu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Yue Lin
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yi Xie
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, China
| | - Changzheng Wu
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, China
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4
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Lim C, Fairhurst AR, Ransom BJ, Haering D, Stamenkovic VR. Role of Transition Metals in Pt Alloy Catalysts for the Oxygen Reduction Reaction. ACS Catal 2023; 13:14874-14893. [PMID: 38026811 PMCID: PMC10660348 DOI: 10.1021/acscatal.3c03321] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/26/2023] [Accepted: 10/03/2023] [Indexed: 12/01/2023]
Abstract
In pursuit of higher activity and stability of electrocatalysts toward the oxygen reduction reaction, it has become standard practice to alloy platinum in various structural configurations. Transition metals have been extensively studied for their ability to tune catalyst functionality through strain, ligand, and ensemble effects. The origin of these effects and potential for synergistic application in practical materials have been the subject of many theoretical and experimental analyses in recent years. Here, a comprehensive overview of these phenomena is provided regarding the impact on reaction mechanisms and kinetics through combined experimental and theoretical approaches. Experimental approaches to electrocatalysis are discussed.
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Affiliation(s)
- Chaewon Lim
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Alasdair R. Fairhurst
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Benjamin J. Ransom
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Dominik Haering
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Vojislav R. Stamenkovic
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
- Department
of Chemistry, University of California, Irvine, California 92697, United States
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5
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Chida Y, Tomimori T, Ebata T, Taguchi N, Ioroi T, Hayashi K, Todoroki N, Wadayama T. Experimental study platform for electrocatalysis of atomic-level controlled high-entropy alloy surfaces. Nat Commun 2023; 14:4492. [PMID: 37495632 PMCID: PMC10372069 DOI: 10.1038/s41467-023-40246-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 07/14/2023] [Indexed: 07/28/2023] Open
Abstract
High-entropy alloys (HEAs) have attracted considerable attention to improve performance of various electrocatalyst materials. A comprehensive understanding of the relationship between surface atomic-level structures and catalytic properties is essential to boost the development of novel catalysts. In this study, we propose an experimental study platform that enables the vacuum synthesis of atomic-level-controlled single-crystal high-entropy alloy surfaces and evaluates their catalytic properties. The platform provides essential information that is crucial for the microstructural fundamentals of electrocatalysis, i.e., the detailed relationship between multi-component alloy surface microstructures and their catalytic properties. Nanometre-thick epitaxially stacking layers of Pt and equi-atomic-ratio Cr-Mn-Fe-Co-Ni, the so-called Cantor alloy, were synthesised on low-index single-crystal Pt substrates (Pt/Cr-Mn-Fe-Co-Ni/Pt(hkl)) as a Pt-based single-crystal alloy surface model for oxygen reduction reaction (ORR) electrocatalysis. The usefulness of the platform was demonstrated by showing the outperforming oxygen reduction reaction properties of high-entropy alloy surfaces when compared to Pt-Co binary surfaces.
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Affiliation(s)
- Yoshihiro Chida
- Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan.
| | - Takeru Tomimori
- Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan
| | - Tomoaki Ebata
- Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan
| | - Noboru Taguchi
- National Institute of Advanced Industrial Science and Technology, Ikeda, 563-8577, Japan
| | - Tsutomu Ioroi
- National Institute of Advanced Industrial Science and Technology, Ikeda, 563-8577, Japan
| | - Kenta Hayashi
- Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan
| | - Naoto Todoroki
- Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan
| | - Toshimasa Wadayama
- Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan
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6
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Bhalothia D, Yan C, Hiraoka N, Ishii H, Liao YF, Chen PC, Wang KW, Chou JP, Dai S, Chen TY. Pt-Mediated Interface Engineering Boosts the Oxygen Reduction Reaction Performance of Ni Hydroxide-Supported Pd Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2023; 15:16177-16188. [PMID: 36939741 DOI: 10.1021/acsami.2c21814] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Fuel cells are considered potential energy conversion devices for utopia; nevertheless, finding a highly efficacious and economical electrocatalyst for the oxygen reduction reaction (ORR) is of great interest. By keeping this in view, we have proposed a novel design of a trimetallic nanocatalyst (NC) comprising atomic Pt clusters at the heterogeneous Ni(OH)2-to-Pd interface (denoted NPP-70). The as-prepared material surpasses the commercial J.M.-Pt/C (20 wt %) catalyst by ∼ 166 and ∼19 times with exceptionally high specific and mass activities of 16.11 mA cm-2 and 484.8 mA mgPt-1 at 0.90 V versus reversible hydrogen electrode (RHE) in alkaline ORR (0.1 M KOH), respectively. On top of that, NPP-70 NC retains nearly 100% performance after 10k accelerated durability test (ADT) cycles. The results of physical characterization and electrochemical analysis confirm that atomic-scale Pt clusters induce strong lattice strain (compressive) at the Ni(OH)2-to-Pd interface, which triggers the electron relocation from Ni to Pt atoms. Such charge localization is vital for O2 splitting on surface Pt atoms, followed by the relocation of OH- ions from the Pd surface. Besides, a sharp fall down in ORR performance (mass activity is 37 mA mgPt-1 at 0.90 V versus RHE) is observed when the Pt clusters are decorated on the surface of NiOx and Pd (denoted NPP-RT). In situ partial fluorescence yield mode X-ray absorption spectroscopy (PFY-XAS) was employed to reveal the ORR pathways on both configurations. The obtained results demonstrate that interface engineering can be a potential approach to boost the electrocatalytic activity of metal hydroxide/oxide-supported Pd nanoparticles and in turn allow Pd to be a promising alternative for commercial Pt catalysts.
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Affiliation(s)
- Dinesh Bhalothia
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Che Yan
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Nozomu Hiraoka
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Hirofumi Ishii
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Yen-Fa Liao
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Po-Chun Chen
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Kuan-Wen Wang
- Institute of Materials Science and Engineering, National Central University, Taoyuan City 32001, Taiwan
| | - Jyh-Pin Chou
- Department of Physics, National Changhua University of Education, Changhua 50007, Taiwan
| | - Sheng Dai
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Tsan-Yao Chen
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
- Hierarchical Green-Energy Materials (Hi-GEM) Research Centre, National Cheng Kung University, Tainan 70101, Taiwan
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7
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Fu X, Pedersen JB, Zhou Y, Saccoccio M, Li S, Sažinas R, Li K, Andersen SZ, Xu A, Deissler NH, Mygind JBV, Wei C, Kibsgaard J, Vesborg PCK, Nørskov JK, Chorkendorff I. Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidation. Science 2023; 379:707-712. [PMID: 36795804 DOI: 10.1126/science.adf4403] [Citation(s) in RCA: 62] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Ammonia is a critical component in fertilizers, pharmaceuticals, and fine chemicals and is an ideal, carbon-free fuel. Recently, lithium-mediated nitrogen reduction has proven to be a promising route for electrochemical ammonia synthesis at ambient conditions. In this work, we report a continuous-flow electrolyzer equipped with 25-square centimeter-effective area gas diffusion electrodes wherein nitrogen reduction is coupled with hydrogen oxidation. We show that the classical catalyst platinum is not stable for hydrogen oxidation in the organic electrolyte, but a platinum-gold alloy lowers the anode potential and avoids the decremental decomposition of the organic electrolyte. At optimal operating conditions, we achieve, at 1 bar, a faradaic efficiency for ammonia production of up to 61 ± 1% and an energy efficiency of 13 ± 1% at a current density of -6 milliamperes per square centimeter.
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Affiliation(s)
- Xianbiao Fu
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Jakob B Pedersen
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Yuanyuan Zhou
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Mattia Saccoccio
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Shaofeng Li
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Rokas Sažinas
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Katja Li
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Suzanne Z Andersen
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Aoni Xu
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Niklas H Deissler
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | | | - Chao Wei
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Jakob Kibsgaard
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Peter C K Vesborg
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Jens K Nørskov
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Ib Chorkendorff
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
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8
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Petersen AS, Jensen KD, Wan H, Bagger A, Chorkendorff I, Stephens IEL, Rossmeisl J, Escudero-Escribano M. Modeling Anion Poisoning during Oxygen Reduction on Pt Near-Surface Alloys. ACS Catal 2023. [DOI: 10.1021/acscatal.2c04808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Amanda S. Petersen
- Department of Chemistry, Center for High Entropy Alloy Catalysis, University of Copenhagen, Universitetsparken 5, Copenhagen Ø DK-2100, Denmark
| | - Kim D. Jensen
- Department of Chemistry, Center for High Entropy Alloy Catalysis, University of Copenhagen, Universitetsparken 5, Copenhagen Ø DK-2100, Denmark
| | - Hao Wan
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, Berlin 14195, Germany
| | - Alexander Bagger
- Department of Materials, Imperial College London, 2.03b, Royal School of Mines, Prince Consort Rd., London SW7 2AZ, England
| | - Ib Chorkendorff
- Department of Physics, Surface Physics and Catalysis, Technical University of Denmark, Fysikvej, Building 312, Kgs. Lyngby DK-2800, Denmark
| | - Ifan E. L. Stephens
- Department of Materials, Imperial College London, 2.03b, Royal School of Mines, Prince Consort Rd., London SW7 2AZ, England
| | - Jan Rossmeisl
- Department of Chemistry, Center for High Entropy Alloy Catalysis, University of Copenhagen, Universitetsparken 5, Copenhagen Ø DK-2100, Denmark
| | - María Escudero-Escribano
- Department of Chemistry, Center for High Entropy Alloy Catalysis, University of Copenhagen, Universitetsparken 5, Copenhagen Ø DK-2100, Denmark
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, Barcelona Institute of Science and Technology, UAB Campus, Bellaterra, Barcelona 08193, Spain
- ICREA, Pg. Lluis Companys 23, Barcelona 08010, Spain
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9
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Xie X, Briega-Martos V, Farris R, Dopita M, Vorokhta M, Skála T, Matolínová I, Neyman KM, Cherevko S, Khalakhan I. Optimal Pt-Au Alloying for Efficient and Stable Oxygen Reduction Reaction Catalysts. ACS APPLIED MATERIALS & INTERFACES 2023; 15:1192-1200. [PMID: 36578102 DOI: 10.1021/acsami.2c18655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Stabilization of cathode catalysts in hydrogen-fueled proton-exchange membrane fuel cells (PEMFCs) is paramount to their widespread commercialization. Targeting that aim, Pt-Au alloy catalysts with various compositions (Pt95Au5, Pt90Au10, and Pt80Au20) prepared by magnetron sputtering were investigated. The promising stability improvement of the Pt-Au catalyst, manifested in suppressed platinum dissolution with increasing Au content, was documented over an extended potential range up to 1.5 VRHE. On the other hand, at elevated concentrations, Au showed a detrimental effect on oxygen reduction reaction activity. A systematic study involving complementary characterization techniques, electrochemistry, and Monte Carlo simulations based on density functional theory data enabled us to gain a comprehensive understanding of the composition-activity-stability relationship to find optimal Pt-Au alloying for maintaining the activity of platinum and improving its resistance to dissolution. According to the results, Pt-Au alloy with 10% gold represent the most promising composition retaining the activity of monometallic Pt while suppressing Pt dissolution by 50% at the upper potential limit of 1.2 VRHE and by 20% at devastating 1.5 VRHE.
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Affiliation(s)
- Xianxian Xie
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Valentín Briega-Martos
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstr. 1, Erlangen 91058, Germany
| | - Riccardo Farris
- Departament de Ciència de Materials i Química Física & Institut de Quimica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1, Barcelona 08028, Spain
| | - Milan Dopita
- Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Charles University, Ke Karlovu 5, Prague 2 12116, Czech Republic
| | - Mykhailo Vorokhta
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Tomáš Skála
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Iva Matolínová
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Konstantin M Neyman
- Departament de Ciència de Materials i Química Física & Institut de Quimica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1, Barcelona 08028, Spain
- ICREA (Institució Catalana de Recerca i Estudis Avançats), Barcelona 08010, Spain
| | - Serhiy Cherevko
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstr. 1, Erlangen 91058, Germany
| | - Ivan Khalakhan
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
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10
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Zan L, Amin HMA, Mostafa E, Abd-El-Latif AA, Iqbal S, Baltruschat H. Electrodeposited Cobalt Nanosheets on Smooth Silver as a Bifunctional Catalyst for OER and ORR: In Situ Structural and Catalytic Characterization. ACS APPLIED MATERIALS & INTERFACES 2022; 14:55458-55470. [PMID: 36490358 DOI: 10.1021/acsami.2c12163] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Developing earth-abundant, cost-effective, and active bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is key to boosting sustainable energy systems such as electrolyzers and lithium-air batteries. However, the performance of promising cobalt-based materials is impaired by the external effects of binders and carbon additives as well as inhomogeneous electrode fabrication. In this work, binder- and carbon-free flower-like Co-decorated Ag catalytic nanosheets were in situ-synthesized via a simple electrodeposition approach. The morphology, composition, and structure of Co/Ag before and after OER were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Co/Ag thin film electrodes with various Co contents exhibited a bifunctional activity toward ORR and OER due to a synergistic effect. XPS analysis suggested the formation of Co3O4 as the main active species for OER. In particular, Co (83%)/Ag surface revealed a 60 mV lower ORR overpotential than a pure Ag surface and even lower than drop-casted Co3O4 nanoparticles on Ag surface. Only 1.5% peroxide was generated, suggesting a four-electron transfer ORR. In addition, the OER onset potential on Co/Ag is 60 mV less than Co3O4. Tafel slopes of 71 and 75 mV dec-1 were obtained for ORR and OER, respectively. Importantly, the three-dimensional (3D) growth mechanism of a cobalt layer (∼1 nm) on a well-defined atomic smooth Ag surface is unraveled by in situ electrochemical scanning tunneling microscopy (EC-STM). EC-STM suggests that Co prefers to nucleate at the step edges of Ag and grows in a 3D, forming nanoparticles, where the deposition/dissolution process of the Co adlayer on Ag is reversible. This investigation may provide insights into design strategies of efficient oxygen electrocatalysts.
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Affiliation(s)
- Lingxing Zan
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Key Laboratory of Chemical Reaction Engineering of Shaanxi Province, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an716000, China
| | - Hatem M A Amin
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Chemistry Department, Faculty of Science, Cairo University, Giza12613, Egypt
| | - Ehab Mostafa
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura35516, Egypt
| | - Abdelaziz A Abd-El-Latif
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Physical Chemistry Department, National Research Center, Cairo12311, Egypt
| | - Shahid Iqbal
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
| | - Helmut Baltruschat
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
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11
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Optimization of SnPd Shell Configuration to Boost ORR Performance of Pt-Clusters Decorated CoOx@SnPd Core-Shell Nanocatalyst. Catalysts 2022. [DOI: 10.3390/catal12111411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Fuel cells are expected to bring change to the whole human race when commercialized, however, the sluggish kinetics of oxygen reduction reaction (ORR) severely hampers their commercial viability. Thus far, platinum (Pt) based catalysts are nearly inevitable due to the harsh redox environment of fuel cells. Thus, minimizing Pt metal loading and increasing Pt utilization is a paramount factor for realizing fuel cell technologies. In this context, herein, we developed a multi-metallic nanocatalyst (NC) comprising Pt-clusters (1 wt.%) decorated SnPd composite shell over cobalt-oxide core crystal underneath (denoted as CSPP). For optimizing the ORR performance of the as-prepared NC, we further modulated the configuration of the SnPd shell. In the optimum case, when the Sn/Pd ratio is 0.5 (denoted as CSPP 1005), the ORR mass activity (MA) is 3034.7 mA mgPt−1 at 0.85 V vs. RHE in 0.1 M KOH electrolyte, which is 45-times higher than the commercial Johnson Matthey-Pt/C (J.M.-Pt/C; 20 wt.% Pt) catalyst (67 mA mgPt−1). The results of physical inspections along with electrochemical analysis suggest that such high performance of CSPP 1005 NC can be attributed to the synergistic collaboration between Pt-clusters, PtPd nanoalloys, and adjacent SnPd domains, where Pt-clusters and PtPd nanoalloys promote the O2 adsorption and subsequent splitting, while the SnPd shell favours the OH− relocation step. We believe that the obtained results will open a new avenue for further exploring the high-performance Pt-based catalysts with low Pt-loading and high utilization.
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12
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Chen MX, Luo X, Song TW, Jiang B, Liang HW. Ordering Degree-Dependent Activity of Pt 3M (M = Fe, Mn) Intermetallic Nanoparticles for Electrocatalytic Methanol Oxidation. J Phys Chem Lett 2022; 13:3549-3555. [PMID: 35420438 DOI: 10.1021/acs.jpclett.2c00433] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Atomically ordered intermetallic alloys with unique electronic and geometrical structures are highly attractive for heterogeneous catalysis and electrocatalysis. However, the formation of intermetallic phases generally requires high-temperature annealing to overcome the kinetic energy barrier of atom ordering, which unfortunately causes high material heterogeneity and thus makes it challenging to identify the exact contribution of ordered structures to the improved performance. Here, we prepared a family of small-sized intermetallic core/shell Pt3M@Pt (M = Mn or Fe) catalysts with varied ordering degree by a high-temperature sulfur-confined method. We identified a strong correlation between the ordering degree of the intermetallic Pt3M core of the catalysts and their electrocatalytic activity for the methanol oxidation reaction. Density functional theory calculations show that the intermetallic Pt3M core induces a compressive strain on the Pt-skin, which weakens the CO* binding, lowers the free energy change from CO* to COOH*, and therefore promotes electrocatalytic methanol oxidation.
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Affiliation(s)
- Ming-Xi Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Xuan Luo
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Tian-Wei Song
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Bin Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hai-Wei Liang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
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13
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Takei D, Yatabe T, Yabe T, Miyazaki R, Hasegawa JY, Yamaguchi K. C-H Bond Activation Mechanism by a Pd(II)-(μ-O)-Au(0) Structure Unique to Heterogeneous Catalysts. JACS AU 2022; 2:394-406. [PMID: 35252989 PMCID: PMC8889553 DOI: 10.1021/jacsau.1c00433] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Indexed: 06/14/2023]
Abstract
We focused on identifying a catalytic active site structure at the atomic level and elucidating the mechanism at the elementary reaction level of liquid-phase organic reactions with a heterogeneous catalyst. In this study, we experimentally and computationally investigated efficient C-H bond activation for the selective aerobic α,β-dehydrogenation of saturated ketones by using a Pd-Au bimetallic nanoparticle catalyst supported on CeO2 (Pd/Au/CeO2) as a case study. Detailed characterization of the catalyst with various observation methods revealed that bimetallic nanoparticles formed on the CeO2 support with an average size of about 2.5 nm and comprised a Au nanoparticle core and PdO nanospecies dispersed on the core. The formation mechanism of the nanoparticles was clarified through using several CeO2-supported controlled catalysts. Activity tests and detailed characterizations demonstrated that the dehydrogenation activity increased with the coordination numbers of Pd-O species in the presence of Au(0) species. Such experimental evidence suggests that a Pd(II)-(μ-O)-Au(0) structure is the true active site for this reaction. Based on density functional theory calculations using a suitable Pd1O2Au12 cluster model with the Pd(II)-(μ-O)-Au(0) structure, we propose a C-H bond activation mechanism via concerted catalysis in which the Pd atom acts as a Lewis acid and the adjacent μ-oxo species acts as a Brønsted base simultaneously. The calculated results reproduced the experimental results for the selective formation of 2-cyclohexen-1-one from cyclohexanone without forming phenol, the regioselectivity of the reaction, the turnover-limiting step, and the activation energy.
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Affiliation(s)
- Daisuke Takei
- Department
of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takafumi Yatabe
- Department
of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Tomohiro Yabe
- Department
of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Ray Miyazaki
- Institute
for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Jun-ya Hasegawa
- Institute
for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Kazuya Yamaguchi
- Department
of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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14
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Effects of Fe species on promoting the dibenzothiophene hydrodesulfurization over the Pt/γ-Al2O3 catalysts. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.07.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Linghu Y, Lu D, Wu C. CO oxidation over defective and nonmetal doped MoS 2monolayers. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:165002. [PMID: 33735845 DOI: 10.1088/1361-648x/abeff9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Defective (missing S atoms) and nonmetal (C- and N-) doped MoS2monolayers in the 2H and 1T' phases have been evaluated for catalyzing CO oxidation based on first-principles calculations. For the reaction 2CO + O2→ 2CO2, the oxidization of the first CO molecule is fairly easy and sometimes is even spontaneous, as the O2 molecule is highly activated or dissociates upon adsorption. However, for the defective (2H-), C-doped (1T'-), and N-doped (2H- and 1T'-) MoS2monolayers, the remaining O*adatom often refuses to react with other CO molecules and is hard to be removed (barrier > 1.20 eV). Only when over the C-doped 2H- and defective 1T'-MoS2monolayers, the removal of the second O*adatom requires to overcome moderate barriers (0.74 and 0.88 eV, respectively) by reacting with another CO molecule via the Eley-Rideal mechanism and the catalysts are recovered. The barriers can be further reduced by applying either tensile or compressive strain to the MoS2nanosheet. In contrast, the Langmuir-Hinshelwood mechanism is followed over the metal-containing MoS2nanosheets, as the bigger size of metal dopants allow the co-adsorption of CO and O2. Therefore, the C-doped 2H- and defective 1T'-MoS2monolayers are promising nonmetal-doped catalysts for CO oxidation.
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Affiliation(s)
- Yaoyao Linghu
- School of Chemistry & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, People's Republic of China
| | - Dongmei Lu
- School of Chemistry & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Chao Wu
- School of Chemistry & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
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16
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Du J, Quinson J, Zhang D, Bizzotto F, Zana A, Arenz M. Bifunctional Pt-IrO 2 Catalysts for the Oxygen Evolution and Oxygen Reduction Reactions: Alloy Nanoparticles versus Nanocomposite Catalysts. ACS Catal 2021. [DOI: 10.1021/acscatal.0c03867] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jia Du
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern 3012, Switzerland
| | - Jonathan Quinson
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen 2100, Denmark
| | - Damin Zhang
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern 3012, Switzerland
| | - Francesco Bizzotto
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern 3012, Switzerland
| | - Alessandro Zana
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern 3012, Switzerland
| | - Matthias Arenz
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern 3012, Switzerland
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17
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Sebastián-Pascual P, Jordão Pereira I, Escudero-Escribano M. Tailored electrocatalysts by controlled electrochemical deposition and surface nanostructuring. Chem Commun (Camb) 2020; 56:13261-13272. [PMID: 33104137 DOI: 10.1039/d0cc06099b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controlled electrodeposition and surface nanostructuring are very promising approaches to tailor the structure of the electrocatalyst surface, with the aim to enhance their efficiency for sustainable energy conversion reactions. In this highlight, we first summarise different strategies to modify the structure of the electrode surface at the atomic and sub-monolayer level for applications in electrocatalysis. We discuss aspects such as structure sensitivity and electronic and geometric effects in electrocatalysis. Nanostructured surfaces are finally introduced as more scalable electrocatalysts, where morphology, cluster size, shape and distribution play an essential role and can be finely tuned. Controlled electrochemical deposition and selective engineering of the surface structure are key to design more active, selective and stable electrocatalysts towards a decarbonised energy scheme.
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Affiliation(s)
- Paula Sebastián-Pascual
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
| | - Inês Jordão Pereira
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
| | - María Escudero-Escribano
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
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18
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Adstructures of platinum-complex precursors and platinum nanoparticles formed on low-index single-crystal Au surfaces for oxygen reduction reaction. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Xin Y, Li S, Qian Y, Zhu W, Yuan H, Jiang P, Guo R, Wang L. High-Entropy Alloys as a Platform for Catalysis: Progress, Challenges, and Opportunities. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03617] [Citation(s) in RCA: 129] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | | | | | - Wenkun Zhu
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
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20
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Lapp AS, Crooks RM. Multilayer electrodeposition of Pt onto 1-2 nm Au nanoparticles using a hydride-termination approach. NANOSCALE 2020; 12:11026-11039. [PMID: 32420580 DOI: 10.1039/d0nr02929g] [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
Here we report on hydride-terminated (HT) electrodeposition of Pt multilayers onto ∼1.6 nm Au nanoparticles (NPs). The results build on our earlier findings regarding electrodeposition of a single monolayer of Pt onto Au NPs and reports relating to HT Pt electrodeposition onto bulk Au. In the latter case, it was found that electrodeposition of Pt from a solution containing PtCl42- can be limited to a single monolayer of Pt atoms if it is immediately followed by adsorption of a monolayer of H atoms. The H-atom capping layer prevents deposition of Pt multilayers. In the present report we are interested in comparing the structure of NPs after multiple HT Pt electrodeposition cycles to the bulk analog. The results indicate that a greater number of HT Pt cycles are required to electrodeposit both a single Pt monolayer and Pt multilayers onto these Au NPs compared to bulk Au. Additionally, detailed structural analysis shows that there are fundamental differences in the structures of the AuPt materials depending on whether they are prepared on Au NPs or bulk Au. The resulting structures have a profound impact on formic acid oxidation electrocatalysis.
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Affiliation(s)
- Aliya S Lapp
- Department of Chemistry and Texas Materials Institute, The University of Texas at Austin, 2506 Speedway, Stop A5300, Austin, TX 78712-1224, USA.
| | - Richard M Crooks
- Department of Chemistry and Texas Materials Institute, The University of Texas at Austin, 2506 Speedway, Stop A5300, Austin, TX 78712-1224, USA.
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21
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Yin S, Ding Y. Bimetallic PtAu electrocatalysts for the oxygen reduction reaction: challenges and opportunities. Dalton Trans 2020; 49:4189-4199. [PMID: 32191785 DOI: 10.1039/d0dt00205d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly active, durable oxygen reduction reaction (ORR) electrocatalysts have an essential role in promoting the continuous operation of advanced energy technologies such as fuel cells and metal-air batteries. Considering the scarce reserve of Pt and its unsatisfactory overall performance, there is an urgent demand for the development of new generation ORR electrocatalysts that are substantially better than the state-of-the-art supported Pt-based nanocatalysts, such as Pt/C. Among various nanostructures, bimetallic PtAu represents one unique alloy system where highly contradictory performance has been reported. While it is generally accepted that Au may contribute to stabilizing Pt, its role in modulating the intrinsic activity of Pt remains unclear. This perspective will discuss critical structural issues that affect the intrinsic ORR activities of bimetallic PtAu, with an eye on elucidating the origin of seemingly inconsistent experimental results from the literature. As a relatively new class of electrodes, we will also highlight the performance of dealloyed nanoporous gold (NPG) based electrocatalysts, which allow a unique combination of structural properties highly desired for this important reaction. Finally, we will put forward the challenges and opportunities for the incorporation of these advanced electrocatalysts into membrane electrode assemblies (MEA) for actual fuel cells.
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Affiliation(s)
- Shuai Yin
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Yi Ding
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.
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22
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Rück M, Garlyyev B, Mayr F, Bandarenka AS, Gagliardi A. Oxygen Reduction Activities of Strained Platinum Core-Shell Electrocatalysts Predicted by Machine Learning. J Phys Chem Lett 2020; 11:1773-1780. [PMID: 32057245 DOI: 10.1021/acs.jpclett.0c00214] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Core-shell nanocatalyst activities are chiefly controlled by bimetallic material composition, shell thickness, and nanoparticle size. We present a machine learning framework predicting strain with site-specific precision to rationalize how strain on Pt core-shell nanocatalysts can enhance oxygen reduction activities. Large compressive strain on Pt@Cu and Pt@Ni induces optimal mass activities at 1.9 nm nanoparticle size. It is predicted that bimetallic Pt@Au and Pt@Ag have the best mass activities at 2.8 nm, where active sites are exposed to weak compressive strain. We demonstrate that optimal strain depends on the nanoparticle size; for instance, strengthening compressive strain on 1.92 nm sized Pt@Cu and Pt@Ni, or weakening compressive strain on 2.83 nm sized Pt@Ag and Pt@Au, can lead to further enhanced mass activities.
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Affiliation(s)
- Marlon Rück
- Department of Electrical and Computer Engineering, Technical University of Munich, 80333 München, Germany
| | - Batyr Garlyyev
- Department of Physics, Technical University of Munich, 85748 Garching, Germany
| | - Felix Mayr
- Department of Electrical and Computer Engineering, Technical University of Munich, 80333 München, Germany
| | | | - Alessio Gagliardi
- Department of Electrical and Computer Engineering, Technical University of Munich, 80333 München, Germany
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23
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Li Q, Zhang T, Yu X, Wu X, Zhang X, Lu Z, Yang X, Huang Y, Li L. Isolated Au Atom Anchored on Porous Boron Nitride as a Promising Electrocatalyst for Oxygen Reduction Reaction (ORR): A DFT Study. Front Chem 2019; 7:674. [PMID: 31681728 PMCID: PMC6811612 DOI: 10.3389/fchem.2019.00674] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 09/25/2019] [Indexed: 11/13/2022] Open
Abstract
The development of efficient, stable, and low-cost catalytic material for the oxygen reduction reaction (ORR) is currently highly desirable but challenging. In this work, based on first-principles calculation, the stabilities, catalytic activities and catalytic mechanisms of isolated Au atom supported on defective porous BN (p-BN) have been studied in detail. The results reveal that the defective p-BN anchor Au atom strongly to ensure the stability of Au/p-BN. Based on frontier molecular orbital and charge-density analysis, isolated Au atom supported on porous BN with VN defect (Au/p-BN-VN) is an effective ORR catalyst. Especially, the low barriers of the formation (0.38 eV) and dissociation (0.31 eV) of *OOH and the instability of H2O2 on Au/p-BN-VN catalyst suggest that ORR proceeds via 4-electron pathway. Along the favorable pathway, the reduction of O2 to *OOH is the rate-limiting step with the largest activation barrier of 0.38 eV and the maximum free energy change is 1.88 eV. Our results provide a useful guidance for the design and fabrication of new Au-base catalyst with high-efficiency and are beneficial for the developing of novel isolated metal atom catalysts for ORR.
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Affiliation(s)
- Qiaoling Li
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
| | - Tianran Zhang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
| | - Xiaofei Yu
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
| | - Xiaoyu Wu
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
| | - Xinghua Zhang
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
| | - Zunming Lu
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
| | - Xiaojing Yang
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
| | - Yang Huang
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
| | - Lanlan Li
- Key Lab for Micro- and Nano-Scale Boron Nitride Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
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24
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Microfluidic devices with gold thin film channels for chemical and biomedical applications: a review. Biomed Microdevices 2019; 21:93. [DOI: 10.1007/s10544-019-0439-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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25
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Rück M, Bandarenka A, Calle-Vallejo F, Gagliardi A. Fast identification of optimal pure platinum nanoparticle shapes and sizes for efficient oxygen electroreduction. NANOSCALE ADVANCES 2019; 1:2901-2909. [PMID: 36133613 PMCID: PMC9418472 DOI: 10.1039/c9na00252a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 05/28/2019] [Indexed: 06/10/2023]
Abstract
Recent advances in experimental synthesis of nanostructures have shown that the interplay between nanoparticle shapes and sizes is crucial to achieve catalysts with high mass activity toward oxygen electroreduction. This is particularly important for proton-exchange membrane fuel cells (PEMFCs), in which expensive and scarce Pt electrocatalysts are used. In this work, we propose a theoretical approach for oxygen electroreduction on PEMFCs to identify not only the size of optimal nanoparticles, but also their shapes. Remarkably, high mass activities up to 4.28 A mgPt -1 are predicted for rod-like nanostructures. Furthermore, we examine nanostructure size effects to guide chemical routes for experimental synthesis of the identified electrocatalysts. Our fast theoretical evaluation of thousands of different nanostructures aids in the search for active catalysts, as substantially enhanced mass activities over commercial Pt/C are predicted for pure Pt electrocatalysts, thus unveiling great potential to reduce the Pt loading in PEMFCs.
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Affiliation(s)
- Marlon Rück
- Department of Electrical and Computer Engineering, Technical University of Munich 80333 München Germany
| | | | - Federico Calle-Vallejo
- Department of Materials Science and Physical Chemistry, Institute of Theoretical and Computational Chemistry (IQTC), University of Barcelona 08028 Barcelona Spain
| | - Alessio Gagliardi
- Department of Electrical and Computer Engineering, Technical University of Munich 80333 München Germany
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26
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Proch S, Yoshino S, Kitazumi K, Seki J, Kodama K, Morimoto Y. Over-Potential Deposited Hydrogen (Hopd) as Terminating Agent for Platinum and Gold Electro(co)Deposition. Electrocatalysis (N Y) 2019. [DOI: 10.1007/s12678-019-00551-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Lee J, Yoo JK, Lee H, Kim SH, Sohn Y, Rhee CK. Formic acid oxidation on Pt deposit model catalysts on Au: Single-layered Pt deposits, plateau-type Pt deposits, and conical Pt deposits. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.107] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Qiu X, Yan X, Pang H, Wang J, Sun D, Wei S, Xu L, Tang Y. Isolated Fe Single Atomic Sites Anchored on Highly Steady Hollow Graphene Nanospheres as an Efficient Electrocatalyst for the Oxygen Reduction Reaction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1801103. [PMID: 30693179 PMCID: PMC6343057 DOI: 10.1002/advs.201801103] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 10/09/2018] [Indexed: 05/29/2023]
Abstract
The rational design of economical and high-performance nanocatalysts to substitute Pt for the oxygen reduction reaction (ORR) is extremely desirable for the advancement of sustainable energy-conversion devices. Isolated single atom (ISA) catalysts have sparked tremendous interests in electrocatalysis due to their maximized atom utilization efficiency. Nevertheless, the fabrication of ISA catalysts remains a grand challenge. Here, a template-assisted approach is demonstrated to synthesize isolated Fe single atomic sites anchoring on graphene hollow nanospheres (denoted as Fe ISAs/GHSs) by using Fe phthalocyanine (FePc) as Fe precursor. The rigid planar macrocycle structure of FePc molecules and the steric-hindrance effect of graphene nanospheres are responsible for the dispersion of Fe-N x species at an atomic level. The combination of atomically dispersed Fe active sites and highly steady hollow substrate affords the Fe ISAs/GHSs outstanding ORR performance with enhanced activity, long-term stability, and better tolerance to methanol, SO2, and NO x in alkaline medium, outperforming the state-of-the-art commercial Pt/C catalyst. This work highlights the great promises of cost-effective Fe-based ISA catalysts in electrocatalysis and provides a versatile strategy for the synthesis of other single metal atom catalysts with superior performance for diverse applications.
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Affiliation(s)
- Xiaoyu Qiu
- Jiangsu Key Laboratory of New Power BatteriesJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China
| | - Xiaohong Yan
- Jiangsu Key Laboratory of New Power BatteriesJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China
| | - Huan Pang
- School of Chemistry and Chemical EngineeringYangzhou UniversityYangzhou225009China
| | - Jingchun Wang
- Jiangsu Key Laboratory of New Power BatteriesJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China
| | - Dongmei Sun
- Jiangsu Key Laboratory of New Power BatteriesJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China
| | - Shaohua Wei
- Jiangsu Key Laboratory of New Power BatteriesJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China
| | - Lin Xu
- Jiangsu Key Laboratory of New Power BatteriesJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China
| | - Yawen Tang
- Jiangsu Key Laboratory of New Power BatteriesJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China
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29
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Zhang M, Miao S, Xu BQ. Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01056d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Au-d@NimPtm nanostructures are studied to address the effects of the Au-core size (d) and NiPt-shell thickness (m) on the electrocatalytic performance of Pt for the ORR.
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Affiliation(s)
- Min Zhang
- Innovative Catalysis Program
- Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
| | - Shu Miao
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Dalian 116023
- China
| | - Bo-Qing Xu
- Innovative Catalysis Program
- Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
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30
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Zhang Q, He J, Guo R, Zhao Y, Zhang W, Zhang W, Pang SS, Ding Y. Assembling Highly Coordinated Pt Sites on Nanoporous Gold for Efficient Oxygen Electroreduction. ACS APPLIED MATERIALS & INTERFACES 2018; 10:39705-39712. [PMID: 30362703 DOI: 10.1021/acsami.8b14079] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Pt with high coordination number (HCN) located in the defect surface sites is favorable for high oxygen reduction reaction activity. However, it is still a challenge to design and fabricate such a structure with a high density of Pt HCN sites at minimum Pt usage. Here, using nanoporous Au (NPG) that intrinsically possesses a higher proportion of HCN Au atoms over traditional nanoparticles, we epitaxially deposit Pt monolayer onto NPG to inherit the high-density HCN Pt sites. Among the NPG-Pt catalysts, the one with a smaller ligament size possesses a higher proportion of HCN Pt atoms, thus exhibiting a 5.2-fold specific activity and 18.7-fold mass activity enhancement than the commercial Pt/C catalyst. Moreover, depositing Au atoms on the NPG-Pt surface can further increase the HCN Pt surface exposure, which leads to a 6.9-fold specific activity and 19.1-fold mass activity increase as compared to Pt/C.
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Affiliation(s)
- Qiwen Zhang
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies , Tianjin University of Technology , Tianjin 300384 , P. R. China
| | - Jia He
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies , Tianjin University of Technology , Tianjin 300384 , P. R. China
| | - Ruijie Guo
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies , Tianjin University of Technology , Tianjin 300384 , P. R. China
| | - Yang Zhao
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies , Tianjin University of Technology , Tianjin 300384 , P. R. China
| | - Weiqing Zhang
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies , Tianjin University of Technology , Tianjin 300384 , P. R. China
| | - Wei Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health , Macau University of Science and Technology , Taipa , Macau 999078 , P. R. China
| | - Su-Seng Pang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health , Macau University of Science and Technology , Taipa , Macau 999078 , P. R. China
| | - Yi Ding
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies , Tianjin University of Technology , Tianjin 300384 , P. R. China
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31
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Lee J, Yoo JK, Kim J, Sohn Y, Rhee CK. Conical multiple-layered Pt deposits on Au and its adsorption stoichiometries of CO and hydrogen. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.09.078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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He S, Hai J, Li T, Liu S, Chen F, Wang B. Photochemical strategies for the green synthesis of ultrathin Au nanosheets using photoinduced free radical generation and their catalytic properties. NANOSCALE 2018; 10:18805-18811. [PMID: 30277245 DOI: 10.1039/c8nr04942d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two-dimensional gold nanosheets represent a class of materials with excellent chemical and structural properties, which are often prepared using a template or toxic CO in organic solvents. Here, we report methylene blue (MB) radicals as a reducing agent to grow freestanding hexagonal ultrathin Au nanosheets with well-tuned thicknesses in water. This is the first time that carbon organic radicals have been used as a reducing agent in metal nanosheet synthesis. Notably, no template is used throughout the synthesis process, and the yield of Au nanosheets is very high. It is found that MB is decisive in the growth of Au nanosheets because no Au nanosheets are obtained in the absence of MB with the same reaction parameters. The resulting nanosheets exhibit excellent catalytic activity during H2O2 decomposition to generate nontoxic O2. Thus, folic acid-conjugated oxygen generating nanosheets could detect cancer cells in serum samples with high sensitivity through pressure signals. Furthermore, the nanosheets exhibit highly efficient activity and selectivity toward the hydrogenation of α,β-unsaturated aldehydes. We anticipate that using MB radicals for the high-yield synthesis of 2D materials in this unique system has demonstrated their effectiveness and provides a green alternative route for producing other 2D nanomaterials.
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Affiliation(s)
- Suisui He
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry Lanzhou University Gansu, Lanzhou, 730000, P.R. China.
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33
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34
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Zhao Y, Zhang W, Yin H, He J, Ding Y. Surface alloying of Pt monolayer on nanoporous gold for enhanced oxygen reduction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.04.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Lapp AS, Duan Z, Marcella N, Luo L, Genc A, Ringnalda J, Frenkel AI, Henkelman G, Crooks RM. Experimental and Theoretical Structural Investigation of AuPt Nanoparticles Synthesized Using a Direct Electrochemical Method. J Am Chem Soc 2018; 140:6249-6259. [DOI: 10.1021/jacs.7b12306] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Nicholas Marcella
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | | | - Arda Genc
- Thermo Fisher Scientific, 5350 NE Dawson Creek Drive, Hillsboro, Oregon 97124, United States
| | - Jan Ringnalda
- Thermo Fisher Scientific, 5350 NE Dawson Creek Drive, Hillsboro, Oregon 97124, United States
| | - Anatoly I. Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
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36
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Todoroki N, Kawamura R, Asano M, Sasakawa R, Takahashi S, Wadayama T. Alloy-composition-dependent oxygen reduction reaction activity and electrochemical stability of Pt-based bimetallic systems: a model electrocatalyst study of Pt/Pt xNi 100-x(111). Phys Chem Chem Phys 2018; 20:11994-12004. [PMID: 29671440 DOI: 10.1039/c8cp01217b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The oxygen reduction reaction (ORR) activity and electrochemical stability of well-defined n monolayer (ML)-Pt/PtxNi100-x(111) (n = 2 and 4; x = 75, 50, and 25) model electrocatalyst surfaces were investigated in this study. The initial activity of the as-prepared two-monolayered Pt-covered PtxNi100-x(111) substrates (2ML-Pt/PtxNi100-x(111)) increased with increasing Ni composition in the PtxNi100-x(111) substrate. In particular, 2ML-Pt/Pt25Ni75(111) showed the initial activity that was 25 times higher than that of clean Pt(111) although the higher Ni composition resulted in destabilization of the catalyst upon the application of potential cycles (PCs). As for 4ML-Pt/PtxNi100-x(111), activity enhancements were insensitive to alloy composition and thicker Pt shell layers stabilized the catalyst against PC applications. In particular, the activities of 4ML-Pt/Pt50Ni50(111) and 4ML-Pt/Pt25Ni75(111) gradually increased during 1000 PCs probably because of the PC-induced mono-atomic heights and nanometer-size islands that had (110) and (100) steps introduced into the topmost (111) terraces. Thus, the simultaneous tuning of core-alloy composition and Pt shell thickness is vital for developing practical, highly efficient Pt-based alloy ORR electrocatalysts.
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Affiliation(s)
- Naoto Todoroki
- Graduate School of Environmental Studies, Tohoku University, Sendai 980-8579, Japan.
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37
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Proch S, Yoshino S, Takahashi N, Seki J, Kosaka S, Kodama K, Morimoto Y. The Native Oxide on Titanium Metal as a Conductive Model Substrate for Oxygen Reduction Reaction Studies. Electrocatalysis (N Y) 2018. [DOI: 10.1007/s12678-018-0465-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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38
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Xue Y, Ge H, Chen Z, Zhai Y, Zhang J, Sun J, Abbas M, Lin K, Zhao W, Chen J. Effect of strain on the performance of iron-based catalyst in Fischer-Tropsch synthesis. J Catal 2018. [DOI: 10.1016/j.jcat.2017.12.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Zhao Y, Wu Y, Liu J, Wang F. Dependent Relationship between Quantitative Lattice Contraction and Enhanced Oxygen Reduction Activity over Pt-Cu Alloy Catalysts. ACS APPLIED MATERIALS & INTERFACES 2017; 9:35740-35748. [PMID: 28976727 DOI: 10.1021/acsami.7b08437] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Lattice contraction has been regarded as an important factor influencing oxygen reduction reaction (ORR) activity of Pt-based alloys. However, the relationship between quantitative lattice contraction and ORR activity has rarely been reported. Herein, using Pt-Cu alloy nanoparticles (NPs) with similar particle sizes but different compositions as examples, we investigated the relationship between quantitative lattice contraction and ORR activity by defining the shrinking percentage of Pt-Pt bond distance as lattice contraction percentage. The results show that the ORR activities of Pt-Cu alloy NPs exhibit a well-defined volcano-type dependent relationship toward the lattice contraction percentage. The dependent correlation can be explained by the Sabatier principle. This study not only proposes a valid descriptor to bridge the activity and atomic composition but also provides a reference for understanding the composition-structure-activity relationship of Pt-based alloys.
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Affiliation(s)
- Yige Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China
| | - Yijun Wu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China
| | - Jingjun Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China
| | - Feng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China
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40
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41
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Soliman KA, Zedan AF, Khalifa A, El-Sayed HA, Aljaber AS, AlQaradawi SY, Allam NK. Silver Nanoparticles-Decorated Titanium Oxynitride Nanotube Arrays for Enhanced Solar Fuel Generation. Sci Rep 2017; 7:1913. [PMID: 28507303 PMCID: PMC5432516 DOI: 10.1038/s41598-017-02124-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 04/06/2017] [Indexed: 11/08/2022] Open
Abstract
We demonstrate, for the first time, the synthesis of highly ordered titanium oxynitride nanotube arrays sensitized with Ag nanoparticles (Ag/TiON) as an attractive class of materials for visible-light-driven water splitting. The nanostructure topology of TiO2, TiON and Ag/TiON was investigated using FESEM and TEM. The X-ray photoelectron spectroscopy (XPS) and the energy dispersive X-ray spectroscopy (EDS) analyses confirm the formation of the oxynitride structure. Upon their use to split water photoelectrochemically under AM 1.5 G illumination (100 mW/cm2, 0.1 M KOH), the titanium oxynitride nanotube array films showed significant increase in the photocurrent (6 mA/cm2) compared to the TiO2 nanotubes counterpart (0.15 mA/cm2). Moreover, decorating the TiON nanotubes with Ag nanoparticles (13 ± 2 nm in size) resulted in exceptionally high photocurrent reaching 14 mA/cm2 at 1.0 VSCE. This enhancement in the photocurrent is related to the synergistic effects of Ag decoration, nitrogen doping, and the unique structural properties of the fabricated nanotube arrays.
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Affiliation(s)
- Khaled A Soliman
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
- Physical Chemistry Department, National Research Centre, Dokki, Cairo, 12441, Egypt
| | - Abdallah F Zedan
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
- National Institute of Laser Enhanced Science, Cairo University, Giza, 12613, Egypt
| | - Ahmed Khalifa
- Energy Materials Laboratory (EML), School of Sciences and Engineering, The American University in Cairo, New Cairo, 11835, Egypt
| | - Hany A El-Sayed
- Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85748, Garching, Germany
| | - Amina S Aljaber
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
| | - Siham Y AlQaradawi
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
| | - Nageh K Allam
- Energy Materials Laboratory (EML), School of Sciences and Engineering, The American University in Cairo, New Cairo, 11835, Egypt.
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42
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Kim D, Kim J. Effect of Anionic Electrolytes and Precursor Concentrations on the Electrodeposited Pt Structures. ELECTROANAL 2017. [DOI: 10.1002/elan.201600346] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dajeong Kim
- Department of Chemistry; Chungbuk National University; Cheongju Chungbuk 28644 Korea
| | - Jongwon Kim
- Department of Chemistry; Chungbuk National University; Cheongju Chungbuk 28644 Korea
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43
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Temmel SE, Fabbri E, Pergolesi D, Lippert T, Schmidt TJ. Investigating the Role of Strain toward the Oxygen Reduction Activity on Model Thin Film Pt Catalysts. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01836] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sandra E. Temmel
- Energy & Environment Division, Paul Scherrer Institut, Villigen PSI 5232, Switzerland
| | - Emiliana Fabbri
- Energy & Environment Division, Paul Scherrer Institut, Villigen PSI 5232, Switzerland
| | - Daniele Pergolesi
- Energy & Environment Division, Paul Scherrer Institut, Villigen PSI 5232, Switzerland
| | - Thomas Lippert
- Energy & Environment Division, Paul Scherrer Institut, Villigen PSI 5232, Switzerland
- Laboratory
of Inorganic Chemistry, ETH Zürich, Zürich 8093, Switzerland
| | - Thomas J. Schmidt
- Energy & Environment Division, Paul Scherrer Institut, Villigen PSI 5232, Switzerland
- Laboratory
of Physical Chemistry, ETH Zürich, Zürich 8093, Switzerland
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44
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Shleev S, Andoralov V, Pankratov D, Falk M, Aleksejeva O, Blum Z. Oxygen Electroreduction versus Bioelectroreduction: Direct Electron Transfer Approach. ELECTROANAL 2016. [DOI: 10.1002/elan.201600280] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Sergey Shleev
- Department of Biomedical Science, Faculty of Health and Society; Malmö University, Skåne; 20506 Malmö Sweden
- Kurchatov NBICS Centre; National Research Centre “Kurchatov Institute”; 123182 Moscow Russia
| | | | - Dmitry Pankratov
- Department of Biomedical Science, Faculty of Health and Society; Malmö University, Skåne; 20506 Malmö Sweden
- Kurchatov NBICS Centre; National Research Centre “Kurchatov Institute”; 123182 Moscow Russia
| | - Magnus Falk
- Department of Biomedical Science, Faculty of Health and Society; Malmö University, Skåne; 20506 Malmö Sweden
- NanoFlex Limited, iTac, Daresbury Laboratory; Sci-Tech Daresbury; Keckwick Lane Daresbury WA4 4AD United Kingdom
| | - Olga Aleksejeva
- Department of Biomedical Science, Faculty of Health and Society; Malmö University, Skåne; 20506 Malmö Sweden
| | - Zoltan Blum
- Department of Biomedical Science, Faculty of Health and Society; Malmö University, Skåne; 20506 Malmö Sweden
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45
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On the oxygen reduction reaction in phosphoric acid electrolyte: Evidence of significantly increased inhibition at steady state conditions. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.04.065] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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46
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Proch S, Kodama K, Yoshino S, Takahashi N, Kato N, Morimoto Y. CO-Terminated Platinum Electrodeposition on Nb-Doped Bulk Rutile TiO2. Electrocatalysis (N Y) 2016. [DOI: 10.1007/s12678-016-0316-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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