REVIEW PAPER |
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Review on the Decay Mechanism of Pt/C and Pt-alloy Catalysts in PEM Fuel Cells |
CAI Chao, CHEN Yanan, FU Kailin, PAN Mu
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State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 |
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Abstract Cost and durability of PEM fuel cells are still two bottlenecks that impede the commercialization of PEM fuel cells. Initially, the degradation of the Pt/C catalyst for the proton exchange membrane fuel cell cathode under practical working conditions is reviewed and possible degradation mechanisms are given. The results indicate that the Pt/C catalyst is not stable under practical working conditions, especially in automotive applications, and cannot meet the practical requirements of cathode materials for PEM fuel cells. Pt alloy catalysts are expected to solve the problems of cost and durability due to their excellent oxygen reduction catalytic properties and relatively good durability. Therefore, they have been paid more and more attention and applied in PEM fuel cells. However, the durability of the alloy catalyst is still a difficult problem. At the end of this paper, the possible mechanism of the PtxCoy alloy catalysts degradation is reviewed and it is found that Pt monolayer structure and Pt skeleton structure can improve the durability of Pt alloy catalysts, which has a directive significance for the synthesis and design of catalysts.
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Published: 10 September 2017
Online: 2018-05-07
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