Affiliation:
1. Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Key Laboratory of Applied Analytical Chemistry Guangxi Minzu University Nanning 530006 China
2. School of Materials Science and Engineering Ocean University of China Qingdao 266100 China
3. School of Chemical and Biomolecular Engineering The University of Sydney Sydney NSW 2006 Australia
Abstract
AbstractEfficient bifunctional electrocatalysts for hydrogen and oxygen evolution reactions are key to water electrolysis. Herein, we report a built‐in electric field (BEF) strategy to fabricate heterogeneous nickel phosphide‐cobalt nanowire arrays grown on carbon fiber paper (Ni2P‐CoCH/CFP) with large work function difference (ΔΦ) as bifunctional electrocatalysts for overall water splitting. Impressively, Ni2P‐CoCH/CFP exhibits a remarkable catalytic activity for hydrogen and oxygen evolution reactions to obtain 10 mA cm−2, respectively. Moreover, the assembled lab‐scale electrolyzer driven by an AAA battery delivers excellent stability after 50 h electrocatalysis with a 100 % faradic efficiency. Computational calculations combining with experiments reveal the interface‐induced electric field effect facilitates asymmetrical charge distributions, thereby regulating the adsorption/desorption of the intermediates during reactions. This work offers an avenue to rationally design high‐performance heterogeneous electrocatalysts.
Funder
National Natural Science Foundation of China
Subject
General Chemistry,Catalysis
Cited by
58 articles.
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