1
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Pan HR, Tang T, Jiang Z, Ding L, Xu C, Hu JS. CO-Tolerant Hydrogen Oxidation Electrocatalysts for Low-Temperature Hydrogen Fuel Cells. J Phys Chem Lett 2024; 15:3011-3022. [PMID: 38465884 DOI: 10.1021/acs.jpclett.4c00027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
The severe performance degradation of low-temperature hydrogen fuel cells upon exposure to trace amounts of carbon monoxide (CO) impurities in reformate hydrogen fuels is one of the challenges that hinders their commercialization. Despite significant efforts that have been made, the CO-tolerance performance of electrocatalysts for the hydrogen oxidation reaction (HOR) is still unsatisfactory. This Perspective discusses the path forward for the rational design of CO-tolerant HOR electrocatalysts. The fundamentals of the CO-tolerant mechanisms on commercialized platinum group metal (PGM) electrocatalysts via either promoting CO electrooxidation or weakening CO adsorption are provided, and comprehensive discussions based on these strategies are presented with typical examples. Given the recent progress, some emerging strategies, including blocking CO diffusion with a barrier layer and developing non-PGM HOR catalysts, are also discussed. We conclude with a discussion of the strengths and limitations of these strategies along with the perspectives of the major challenges and opportunities for future research on CO-tolerant HOR electrocatalysts.
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Affiliation(s)
- Hai-Rui Pan
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Tang Tang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhe Jiang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liang Ding
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cailing Xu
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jin-Song Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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2
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Meyer Q, Yang C, Cheng Y, Zhao C. Overcoming the Electrode Challenges of High-Temperature Proton Exchange Membrane Fuel Cells. ELECTROCHEM ENERGY R 2023. [DOI: 10.1007/s41918-023-00180-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
AbstractProton exchange membrane fuel cells (PEMFCs) are becoming a major part of a greener and more sustainable future. However, the costs of high-purity hydrogen and noble metal catalysts alongside the complexity of the PEMFC system severely hamper their commercialization. Operating PEMFCs at high temperatures (HT-PEMFCs, above 120 °C) brings several advantages, such as increased tolerance to contaminants, more affordable catalysts, and operations without liquid water, hence considerably simplifying the system. While recent progresses in proton exchange membranes for HT-PEMFCs have made this technology more viable, the HT-PEMFC viscous acid electrolyte lowers the active site utilization by unevenly diffusing into the catalyst layer while it acutely poisons the catalytic sites. In recent years, the synthesis of platinum group metal (PGM) and PGM-free catalysts with higher acid tolerance and phosphate-promoted oxygen reduction reaction, in conjunction with the design of catalyst layers with improved acid distribution and more triple-phase boundaries, has provided great opportunities for more efficient HT-PEMFCs. The progress in these two interconnected fields is reviewed here, with recommendations for the most promising routes worthy of further investigation. Using these approaches, the performance and durability of HT-PEMFCs will be significantly improved.
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3
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Wang YH, Gao FY, Zhang XL, Yang Y, Liao J, Niu ZZ, Qin S, Yang PP, Yu PC, Sun M, Gao MR. Efficient NH 3-Tolerant Nickel-Based Hydrogen Oxidation Catalyst for Anion Exchange Membrane Fuel Cells. J Am Chem Soc 2023; 145:17485-17494. [PMID: 37526148 DOI: 10.1021/jacs.3c06903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Converting hydrogen chemical energy into electrical energy by fuel cells offers high efficiencies and environmental advantages, but ultrapure hydrogen (over 99.97%) is required; otherwise, the electrode catalysts, typically platinum on carbon (Pt/C), will be poisoned by impurity gases such as ammonia (NH3). Here we demonstrate remarkable NH3 resistivity over a nickel-molybdenum alloy (MoNi4) modulated by chromium (Cr) dopants. The resultant Cr-MoNi4 exhibits high activity toward alkaline hydrogen oxidation and can undergo 10,000 cycles without apparent activity decay in the presence of 2 ppm of NH3. Furthermore, a fuel cell assembled with this catalyst retains 95% of the initial peak power density even when NH3 (10 ppm)/H2 was fed, whereas the power output reduces to 61% of the initial value for the Pt/C catalyst. Experimental and theoretical studies reveal that the Cr modifier not only creates electron-rich states that restrain lone-pair electron donation but also downshifts the d-band center to suppress d-electron back-donation, synergistically weakening NH3 adsorption.
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Affiliation(s)
- Ye-Hua Wang
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Fei-Yue Gao
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Xiao-Long Zhang
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Yu Yang
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jie Liao
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Zhuang-Zhuang Niu
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Shuai Qin
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Peng-Peng Yang
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Peng-Cheng Yu
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Mei Sun
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Min-Rui Gao
- Division of Nanomaterials & Chemistry, 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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4
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Yang Y, Gao F, Zhang X, Qin S, Zheng L, Wang Y, Liao J, Yang Q, Gao M. Suppressing Electron Back‐Donation for a Highly CO‐tolerant Fuel Cell Anode Catalyst via Cobalt Modulation. Angew Chem Int Ed Engl 2022; 61:e202208040. [DOI: 10.1002/anie.202208040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Yu Yang
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
| | - Fei‐Yue Gao
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
| | - Xiao‐Long Zhang
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
| | - Shuai Qin
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
| | - Li‐Rong Zheng
- Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing China
| | - Ye‐Hua Wang
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
| | - Jie Liao
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
| | - Qing Yang
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
| | - Min‐Rui Gao
- Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China 230026 Hefei China
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Yang Y, Gao FY, Zhang XL, Qin S, Zheng LR, Wang YH, Liao J, Yang Q, Gao MR. Suppressing Electron Back‐Donation for a Highly CO‐tolerant Fuel Cell Anode Catalyst via Cobalt Modulation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yu Yang
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale CHINA
| | - Fei-Yue Gao
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale CHINA
| | - Xiao-Long Zhang
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale CHINA
| | - Shuai Qin
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale CHINA
| | - Li-Rong Zheng
- Chinese Academy of Sciences Beijing Synchrotron Radiation Facility, Institute of High Energy Physics CHINA
| | - Ye-Hua Wang
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale CHINA
| | - Jie Liao
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale CHINA
| | - Qing Yang
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale CHINA
| | - Min-Rui Gao
- University of Science and Technology of China Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale Jinzhai Road 96 230026 Hefei CHINA
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6
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Carbon Monoxide Tolerant Pt-Based Electrocatalysts for H2-PEMFC Applications: Current Progress and Challenges. Catalysts 2021. [DOI: 10.3390/catal11091127] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The activity degradation of hydrogen-fed proton exchange membrane fuel cells (H2-PEMFCs) in the presence of even trace amounts of carbon monoxide (CO) in the H2 fuel is among the major drawbacks currently hindering their commercialization. Although significant progress has been made, the development of a practical anode electrocatalyst with both high CO tolerance and stability has still not occurred. Currently, efforts are being devoted to Pt-based electrocatalysts, including (i) alloys developed via novel synthesis methods, (ii) Pt combinations with metal oxides, (iii) core–shell structures, and (iv) surface-modified Pt/C catalysts. Additionally, the prospect of substituting the conventional carbon black support with advanced carbonaceous materials or metal oxides and carbides has been widely explored. In the present review, we provide a brief introduction to the fundamental aspects of CO tolerance, followed by a comprehensive presentation and thorough discussion of the recent strategies applied to enhance the CO tolerance and stability of anode electrocatalysts. The aim is to determine the progress made so far, highlight the most promising state-of-the-art CO-tolerant electrocatalysts, and identify the contributions of the novel strategies and the future challenges.
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7
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Biancolli ALG, Lopes T, Paganin VA, Ticianelli EA. PEM fuel cells fed by hydrogen from ethanol dehydrogenation reaction: Unveiling the poisoning mechanisms of the by-products. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Yamazaki S, Asahi M, Siroma Z, Ioroi T. Electrochemical CO oxidation by a Rh tetraaza[14]annulene‐based catalyst. ChemCatChem 2020. [DOI: 10.1002/cctc.202000276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Shin‐ichi Yamazaki
- Research Institute of Electrochemical Energy Department of Energy and Environment National Institute of Advanced Industrial Science and Technology (AIST) 1-8-31 Midorigaoka Ikeda Osaka 563-8577 Japan
| | - Masafumi Asahi
- Research Institute of Electrochemical Energy Department of Energy and Environment National Institute of Advanced Industrial Science and Technology (AIST) 1-8-31 Midorigaoka Ikeda Osaka 563-8577 Japan
| | - Zyun Siroma
- Research Institute of Electrochemical Energy Department of Energy and Environment National Institute of Advanced Industrial Science and Technology (AIST) 1-8-31 Midorigaoka Ikeda Osaka 563-8577 Japan
| | - Tsutomu Ioroi
- Research Institute of Electrochemical Energy Department of Energy and Environment National Institute of Advanced Industrial Science and Technology (AIST) 1-8-31 Midorigaoka Ikeda Osaka 563-8577 Japan
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9
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Effect of temperature on the ethanol electrooxidation at PtNirich@PtrichNi/C catalyst in acidic and alkaline media. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2019.113754] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Min J, Jeffery AA, Kim Y, Jung N. Electrochemical Analysis for Demonstrating CO Tolerance of Catalysts in Polymer Electrolyte Membrane Fuel Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1425. [PMID: 31597387 PMCID: PMC6835550 DOI: 10.3390/nano9101425] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 09/29/2019] [Accepted: 10/01/2019] [Indexed: 12/01/2022]
Abstract
Since trace amounts of CO in H2 gas produced by steam reforming of methane causes severe poisoning of Pt-based catalysts in polymer electrolyte membrane fuel cells (PEMFCs), research has been mainly devoted to exploring CO-tolerant catalysts. To test the electrochemical property of CO-tolerant catalysts, chronoamperometry is widely used under a CO/H2 mixture gas atmosphere as an essential method. However, in most cases of catalysts with high CO tolerance, the conventional chronoamperometry has difficulty in showing the apparent performance difference. In this study, we propose a facile and precise test protocol to evaluate the CO tolerance via a combination of short-term chronoamperometry and a hydrogen oxidation reaction (HOR) test. The degree of CO poisoning is systematically controlled by changing the CO adsorption time. The HOR polarization curve is then measured and compared with that measured without CO adsorption. When the electrochemical properties of PtRu alloy catalysts with different atomic ratios of Pt to Ru are investigated, contrary to conventional chronoamperometry, these catalysts exhibit significant differences in their CO tolerance at certain CO adsorption times. The present work will facilitate the development of catalysts with extremely high CO tolerance and provide insights into the improvement of electrochemical methods.
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Affiliation(s)
- Jiho Min
- Graduate School of Energy Science and Technology (GEST), Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea.
| | - A Anto Jeffery
- Graduate School of Energy Science and Technology (GEST), Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea.
| | - Youngjin Kim
- Graduate School of Energy Science and Technology (GEST), Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea.
| | - Namgee Jung
- Graduate School of Energy Science and Technology (GEST), Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea.
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11
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Stewart C, Gibson EK, Morgan K, Cibin G, Dent AJ, Hardacre C, Kondratenko EV, Kondratenko VA, McManus C, Rogers S, Stere CE, Chansai S, Wang YC, Haigh SJ, Wells PP, Goguet A. Unraveling the H 2 Promotional Effect on Palladium-Catalyzed CO Oxidation Using a Combination of Temporally and Spatially Resolved Investigations. ACS Catal 2018; 8:8255-8262. [PMID: 30221029 PMCID: PMC6135604 DOI: 10.1021/acscatal.8b01509] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 06/14/2018] [Indexed: 12/02/2022]
Abstract
![]()
The promotional effect
of H2 on the oxidation of CO
is of topical interest, and there is debate over whether this promotion
is due to either thermal or chemical effects. As yet there is no definitive
consensus in the literature. Combining spatially resolved mass spectrometry
and X-ray absorption spectroscopy (XAS), we observe a specific environment
of the active catalyst during CO oxidation, having the same specific
local coordination of the Pd in both the absence and presence of H2. In combination with Temporal Analysis of Products (TAP),
performed under isothermal conditions, a mechanistic insight into
the promotional effect of H2 was found, providing clear
evidence of nonthermal effects in the hydrogen-promoted oxidation
of carbon monoxide. We have identified that H2 promotes
the Langmuir–Hinshelwood mechanism, and we propose this is
linked to the increased interaction of O with the Pd surface in the
presence of H2. This combination of spatially resolved
MS and XAS and TAP studies has provided previously unobserved insights
into the nature of this promotional effect.
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Affiliation(s)
- Caomhán Stewart
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, U.K
| | - Emma K. Gibson
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, U.K
- UK Catalysis Hub, Research Complex at Harwell, Didcot, Oxfordshire OX11 0FA, U.K
| | - Kevin Morgan
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, U.K
| | - Giannantonio Cibin
- Diamond Light Source Ltd, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K
| | - Andrew J. Dent
- Diamond Light Source Ltd, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K
| | - Christopher Hardacre
- School of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, U.K
| | - Evgenii V. Kondratenko
- Leibniz-Institut für Katalyse e.V, Universität Rostock, Albert-Einstein-Straße 29a, Rostock D-18059, Germany
| | - Vita A. Kondratenko
- Leibniz-Institut für Katalyse e.V, Universität Rostock, Albert-Einstein-Straße 29a, Rostock D-18059, Germany
| | - Colin McManus
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, U.K
| | - Scott Rogers
- UK Catalysis Hub, Research Complex at Harwell, Didcot, Oxfordshire OX11 0FA, U.K
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Cristina E. Stere
- School of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, U.K
| | - Sarayute Chansai
- School of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, U.K
| | - Yi-Chi Wang
- School of Materials, University of Manchester, Manchester M13 9PL, U.K
| | - Sarah J. Haigh
- School of Materials, University of Manchester, Manchester M13 9PL, U.K
| | - Peter P. Wells
- UK Catalysis Hub, Research Complex at Harwell, Didcot, Oxfordshire OX11 0FA, U.K
- Diamond Light Source Ltd, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Alexandre Goguet
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, U.K
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12
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Hassan A, Ticianelli EA. Activity and Stability of Dispersed Multi Metallic Pt-based Catalysts for CO Tolerance in Proton Exchange Membrane Fuel Cell Anodes. AN ACAD BRAS CIENC 2018; 90:697-718. [PMID: 29668800 DOI: 10.1590/0001-3765201820170559] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 09/06/2017] [Indexed: 11/22/2022] Open
Abstract
Studies aiming at improving the activity and stability of dispersed W and Mo containing Pt catalysts for the CO tolerance in proton exchange membrane fuel cell (PEMFC) anodes are revised for the following catalyst systems: (1) a carbon supported PtMo electrocatalyst submitted to heat treatments; (2) Pt and PtMo nanoparticles deposited on carbon-supported molybdenum carbides (Mo2C/C); (3) ternary and quaternary materials formed by PtMoFe/C, PtMoRu/C and PtMoRuFe/C and; (4) Pt nanoparticles supported on tungsten carbide/carbon catalysts and its parallel evaluation with carbon supported PtW catalyst. The heat-treated (600 oC) Pt-Mo/C catalyst showed higher hydrogen oxidation activity in the absence and in the presence of CO and better stability, compared to all other Mo-containing catalysts. PtMoRuFe, PtMoFe, PtMoRu supported on carbon and Pt supported on Mo2C/C exhibited similar CO tolerances but better stability, as compared to as-prepared PtMo supported on carbon. Among the tungsten-based catalysts, tungsten carbide supported Pt catalyst showed reasonable performance and reliable stability in comparison to simple carbon supported PtW catalyst, though an uneven level of catalytic activity towards H2 oxidation in presence of CO is observed for the former as compared to Mo containing catalyst. However, a small dissolution of Mo, Ru, Fe and W from the anodes and their migration toward cathodes during the cell operation is observed. These results indicate that the fuel cell performance and stability has been improved but not yet totally resolved.
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Affiliation(s)
- Ayaz Hassan
- Instituto de Química de São Carlos-USP, Avenida Trabalhador São Carlense, 400, Parque Arnold Schimidt, Caixa Postal 780, 13560-970 São Carlos, SP, Brazil
| | - Edson A Ticianelli
- Instituto de Química de São Carlos-USP, Avenida Trabalhador São Carlense, 400, Parque Arnold Schimidt, Caixa Postal 780, 13560-970 São Carlos, SP, Brazil
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13
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14
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Farias MJS, Cheuquepan W, Camara GA, Feliu JM. Disentangling Catalytic Activity at Terrace and Step Sites on Selectively Ru-Modified Well-Ordered Pt Surfaces Probed by CO Electro-oxidation. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00439] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manuel J. S. Farias
- Instituto
de Química, Universidade Federal de Mato Grosso do Sul, C.P. 549, 79070-900 Campo Grande, Brazil
| | - William Cheuquepan
- Instituto
de Electroquímica, Universidad de Alicante Ap. 99, E-03080 Alicante, Spain
| | - Giuseppe A. Camara
- Instituto
de Química, Universidade Federal de Mato Grosso do Sul, C.P. 549, 79070-900 Campo Grande, Brazil
| | - Juan M. Feliu
- Instituto
de Electroquímica, Universidad de Alicante Ap. 99, E-03080 Alicante, Spain
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15
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Oxidation of Small Supported Platinum-based Nanoparticles Under Near-Ambient Pressure Exposure to Oxygen. Top Catal 2016. [DOI: 10.1007/s11244-015-0529-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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16
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Hassan A, Paganin VA, Ticianelli EA. Effect of Addition of Ru and/or Fe in the Stability of PtMo/C Electrocatalysts in Proton Exchange Membrane Fuel Cells. Electrocatalysis (N Y) 2015. [DOI: 10.1007/s12678-015-0269-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Yamazaki SI, Yao M, Asahi M, Sato H, Yamano A, Ioroi T. Characterization of a Rh(iii) porphyrin–CO complex: its structure and reactivity with an electron acceptor. Dalton Trans 2015. [DOI: 10.1039/c5dt01453k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To analyse the electrocatalytic oxidation of carbon monoxide by Rh porphyrins, we isolated a CO-adduct of Rh octaethylporphyrin, and examined its properties and reactivity by IR, NMR, and X-ray crystallographic analyses.
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Affiliation(s)
- Shin-ichi Yamazaki
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
| | - Masaru Yao
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
| | - Masafumi Asahi
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
| | | | | | - Tsutomu Ioroi
- Research Institute of Electrochemical Energy
- Department of Energy and Environment
- National Institute of Advanced Industrial Science and Technology (AIST)
- Ikeda
- Japan
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18
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Jeon MK, Lee KR, Jeon HJ, McGinn PJ, Kang KH, Park GI. Quaternary Pt2Ru1Fe1M1/C (M=Ni, Mo, or W) catalysts for methanol electro-oxidation reaction. KOREAN J CHEM ENG 2014. [DOI: 10.1007/s11814-014-0186-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Real-time determination of CO2 production and estimation of adsorbate coverage on a proton exchange membrane fuel cell under oscillatory operation. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2048-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ehteshami SMM, Chan SH. A review of electrocatalysts with enhanced CO tolerance and stability for polymer electrolyte membarane fuel cells. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.01.086] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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