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Fabrication of Ni-Mo-based Electrocatalysts by Modified Z Phosphating for Hydrogen Evolution Reaction

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Authors

Im, Han Seo; Park, Seon Ha; Ha, Hyo Jeong; Lee, Sumin; Heo, Sungjun; Im, Sang Won; Nam, Ki Tae; Lim, Sung Yul

Issue Date
2022-02
Publisher
The Korean Electrochemical Society
Citation
Journal of Electrochemical Science and Technology, Vol.13 No.1, pp.54-62
Abstract
The preparation of low-cost, simple, and scalable electrodes is crucial for the commercialization of water electrolyzers for H-2 production. Herein, we demonstrate the fabrication of cathodes through Mo-modified Zn phosphating of Ni foam (NiF) for water electrolysis, which has been largely utilized in surface coating industry. In situ growth of electrocatalytically active layers in the hydrogen evolution reaction (HER) was occurred after 1 min of phosphating to form ZnNiMoPi, and subsequent thermal treatment and electrochemical activation resulted in the formation of ZnNiMoPOxHy. ZnNiMoPOxHy exhibited superior HER performance than NiF, primarily because of the increased electrochemically active surface area of ZnNiMoPOxHy. compared to that of bare NiF. Although further investigations to improve the intrinsic electrochemical activity toward the HER and detailed mechanistic studies are required, these results suggest that phosphating is a promising coating method and will possibly advance the fabrication procedure of electrodes for water electrolyzers with better practical applications.
ISSN
2093-8551
URI
https://hdl.handle.net/10371/179442
DOI
https://doi.org/10.33961/jecst.2021.00857
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Materials Science and Engineering (재료공학부)Journal Papers (저널논문_재료공학부)
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