Design strategies of Pt-based electrocatalysts and tolerance strategies in fuel cells: a review

As highly efficient conversion devices, proton-exchange-membrane fuel cells (PEMFCs) can directly convert chemical energy to electrical energy with high efficiencies and lower or even zero emissions compared to combustion engines. However, the practical applications of PEMFCs have been seriously hin...

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Bibliographic Details
Published in:RSC advances 2023-01, Vol.13 (7), p.483-4822
Main Authors: Luo, Wenlei, Jiang, Yitian, Wang, Mengwei, Lu, Dan, Sun, Xiaohui, Zhang, Huahui
Format: Article
Language:English
Subjects:
Alloying
Carbon monoxide poisoning
Catalysts
Chemical energy
Chemistry
Composite materials
Electrocatalysts
Fuel cells
Platinum base alloys
Poisoning
Proton exchange membrane fuel cells
Synergistic effect
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Summary:As highly efficient conversion devices, proton-exchange-membrane fuel cells (PEMFCs) can directly convert chemical energy to electrical energy with high efficiencies and lower or even zero emissions compared to combustion engines. However, the practical applications of PEMFCs have been seriously hindered by the intermediates (especially CO) poisoning of anodic Pt catalysts. Hence, how to improve the CO tolerance of the needed Pt catalysts and reveal their anti-CO poisoning mechanism are the key points to developing novel anti-toxic Pt-based electrocatalysts. To date, two main strategies have received increasing attention in improving the CO tolerance of Pt-based electrocatalysts, including alloying Pt with a second element and fabricating composites with geometry and interface engineering. Herein, we will first discuss the latest developments of Pt-based alloys and their anti-CO poisoning mechanism. Subsequently, a detailed description of Pt-based composites with enhanced CO tolerance by utilizing the synergistic effect between Pt and carriers is introduced. Finally, a brief perspective and new insights on the design of Pt-based electrocatalysts to inhibit CO poisoning in PEMFCs are also presented. The latest developments of Pt-based electrocatalysts and their anti-CO poisoning mechanism are introduced. A brief perspective on the design of Pt-based electrocatalysts to inhibit CO poisoning in PEMFCs are also presented.
ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra07644f