质子交换膜燃料电池
催化作用
降级(电信)
循环伏安法
溶解
材料科学
阴极
燃料电池
质子
化学工程
膜
化学
无机化学
电化学
电极
计算机科学
物理化学
物理
工程类
电信
生物化学
量子力学
作者
Michal Ronovský,Lujin Pan,Malte Klingenhof,Isaac Martens,Lukáš Fusek,Peter Kúš,Raphaël Chattot,Marta Mirolo,Fabio Dionigi,Harriet Burdett,Jonathan Sharman,Peter Strasser,Alex Martinez Bonastre,Jakub Drnec
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-08-31
卷期号:6 (17): 8660-8665
被引量:1
标识
DOI:10.1021/acsaem.3c01243
摘要
Octahedra (oh) PtNiX/C catalysts are notable cathode catalysts for proton-exchange membrane fuel cells due to their exceptional oxygen reduction reaction activity. Here, we investigate the degradation of oh-PtNiIr catalysts under fuel-cell conditions using operando X-ray diffraction (XRD). Employing two accelerated stress tests with different lower potential limits and XRD-coupled cyclic voltammetry on benchmark Pt and oh-PtNiIr catalysts, we find that dissolution and degradation are proportional to the extent of reduction, independent of the catalyst’s nature. Our method identifies the optimal potential range for Pt-based catalysts to minimize degradation without lengthy stress tests.
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