氢化物
催化作用
钼
阳极
材料科学
电催化剂
甲醇
氢化钯
化学工程
化学
吸附
钯
电化学
氢
无机化学
有机化学
物理化学
电极
工程类
作者
Jiandong Wu,Xiaoqiang Cui,Jinchang Fan,Jingxiang Zhao,Qinghua Zhang,Guangri Jia,Qiong Wu,Dantong Zhang,Changmin Hou,Shan Xu,Dongxu Jiao,Lin Gu,David J. Singh,Weitao Zheng
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-04-27
卷期号:6 (5): 1912-1919
被引量:45
标识
DOI:10.1021/acsenergylett.1c00614
摘要
Active and durable anode electrocatalysts are of vital importance for practical implementation of fuel cells. However, the surface-adsorbed reaction intermediates, especially CO, easily poison and deactivate the electrocatalysts. Here, we report ultrathin molybdenum–palladium hydride (MoPdH) bimetallene as a high-efficiency electrocatalyst for the methanol oxidation reaction. This exhibits a 6.0-fold enhancement of mass activity relative to commercial Pd black catalyst. Alloying with Mo strongly enhances the H binding ability of Pd and thereby stabilizes the MoPdH bimetallene. The resulting ultrathin hydride structure and the stabilization of it by Mo alloying yields a MoPdH bimetallene with the outstanding CO tolerance. The stabilization is understood in terms of the Miedema rule, which thus provides a new opportunity for catalyst design boosting the commercialization of fuel cells based on stable bimetallene hydride nanosheets.
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