期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 27, 页码 10934-10938出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202000383
关键词
alkaline water electrolysis; electrocatalysis; hydrogen evolution reaction (HER); nickel-iron clusters; platinum
资金
- International Graduate School of Science and Engineering of Technical University of Munich [11.01]
- German Research Foundation (DFG) [355784621, BA 5795/3-1, Strategy-EXC 2089/1-390776260]
- China Scholarship Council [201806140125, 201706170015, 201606180040]
Herein, we demonstrate an easy way to improve the hydrogen evolution reaction (HER) activity of Pt electrodes in alkaline media by introducing Ni-Fe clusters. As a result, the overpotential needed to achieve a current density of 10 mA cm(-2) in H-2-saturated 0.1 m KOH is reduced for the model single-crystal electrodes down to about 70 mV. To our knowledge, these modified electrodes outperform any other reported electrocatalysts tested under similar conditions. Moreover, the influence of 1) Ni to Fe ratio, 2) cluster coverage, and 3) the nature of the alkali-metal cations present in the electrolyte on the HER activity has been investigated. The observed catalytic performance likely originates from both the improved water dissociation at the Ni-Fe clusters and the subsequent optimal hydrogen adsorption and recombination at Pt atoms present at the Ni-Fe/Pt boundary.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据