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Chemcial Industry and Engineering 2022, Vol. 39 Issue (2) :41-49    DOI: 10.13353/j.issn.1004.9533.20210304
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Highly efficient and durable Ni-Fe alloy catalyst towards OER via one-step electrodeposition
GE Sheng1, MIN Luofu1, FEI Hongda1, JI Dinghao2, WANG Yuxin1
1. State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
2. National Key Laboratory for Human Factors Engineering, Beijing 100094, China

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Abstract We propose here a facile and readily scalable method to fabricate highly efficient and durable electrocatalyst towards oxygen evolution reaction (OER). Using common nickel mesh as a substrate, Ni-Fe alloy with hierarchical pores is formed in-situ via one-step electrodeposition. The electrodeposition of Ni and Fe is accompanied by hydrogen evolution, the generated hydrogen bubble facilitate the formation of hierarchically porous structure. The particular porous structure of the Ni-Fe alloy is beneficial to OER in terms of charge transfer and gas bubble release. For this structure is formed under a very similar condition, i.e., gas evolution, it adapts well when working on OER. The Ni-Fe alloy catalyst with 15% Fe shows the best performance of an overpotential of 210 mV at 10 mA·cm-2 and a low Tafel slop of 35 mV·dec-1. Furthermore, the Ni-Fe alloy catalyst presents remarkable durability under industrial alkaline water electrolysis conditions for 250 h. Therefore, the hierarchically porous Ni-Fe alloy prepared via one-step electrodeposition is a promising OER catalyst in alkaline water electrolysis.
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Articles by authors
GE Sheng
MIN Luofu
FEI Hongda
JI Dinghao
WANG Yuxin
KeywordsNi-Fe alloy;   oxygen evolution reaction;   alkaline water electrolysis;   electrodeposition;   Ni mesh     
Received 2021-03-03;
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GE Sheng, MIN Luofu, FEI Hongda, JI Dinghao, WANG Yuxin.Highly efficient and durable Ni-Fe alloy catalyst towards OER via one-step electrodeposition[J]  Chemcial Industry and Engineering, 2022,V39(2): 41-49
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