journal article·2021-05-14

Stable Bimetallene Hydride Boosts Anodic CO Tolerance of Fuel Cells

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

ACS Energy Letters· Volume 6· Issue 5
Publisher page

Abstract

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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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Catalysis and Hydrodesulfurization Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun 130012, China

Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, and College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China

Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Laboratory of Advanced Materials and Electron Microscopy, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China

Department of Physics and Astronomy and Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7010, United States

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · Jilin Province Science and Technology Development Program · Project for Self-innovation Capability Construction of Jilin Province Development and Reform Commission · Program for JLU Science and Technology Innovative Research Team · National Key Research and Development Program of China

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