Effect of different carbon supports of Pt catalyst on performance of membrane electrode assembly

Jun WANG, Zhenzhen DU, Fan YU, Xudong WANG, Jiongli LI

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Journal of Materials Engineering ›› 2025, Vol. 53 ›› Issue (6) : 198-209. DOI: 10.11868/j.issn.1001-4381.2024.000170
RESEARCH ARTICLE

Effect of different carbon supports of Pt catalyst on performance of membrane electrode assembly

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Abstract

The effect of Pt catalysts with varied carbon supports on the performance of membrane electrode assembly (MEA) in proton exchange membrane fuel cell is different. In this study, graphene and Vulcan XC-72 supported Pt catalysts (Pt/G and Pt/C) are prepared respectively, and their morphology and physical properties are characterized. As cathode catalysts of MEA, the effects of Pt/G and Pt/C on the performance of MEA at varied I/C ratios are investigated by polarization curve performance test and electrochemical impedance spectroscopy test. The cyclic voltammetry curve test and accelerated stress test are carried out to further evaluate the influence of Pt catalysts with different carbon supports on the stability of MEA in the fuel cell operating environment through the changes in the electrochemical active surface area and polarization curve. The results show that the optimal I/C ratios of Pt/G and Pt/C are 0.5 and 0.6, respectively. With the increase of Pt loadings, the polarization curves show a trend of first increasing and then decreasing, and the maximum value is 0.8 mgPt/cm2. After 30000 triangular wave cycles, the ECSA loss rate of Pt/G is 63%, and the peak power retention rate is as high as 60%. Compared with Pt/C, graphene is a MEA catalyst carrier with better stability than amorphous carbon Vulcan XC-72.

Key words

membrane electrode / Pt catalyst / proton exchange membrane / fuel cell / graphene / carbon supports

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Jun WANG , Zhenzhen DU , Fan YU , et al . Effect of different carbon supports of Pt catalyst on performance of membrane electrode assembly. Journal of Materials Engineering. 2025, 53(6): 198-209 https://doi.org/10.11868/j.issn.1001-4381.2024.000170

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