Soft-template derived Ni/Mo2C hetero-sheet arrays for large current density hydrogen evolution reaction

Liu, Zhao, He, Huawei, Liu, Yuxuan, Zhang, Yi, Shi, Jiawei, Xiong, Jie, Zhou, Shunfa, Li, Jing, Fan, Liyuan, and Cai, Weiwei (2023) Soft-template derived Ni/Mo2C hetero-sheet arrays for large current density hydrogen evolution reaction. Journal of Colloid and Interface Science, 635. pp. 23-31.

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Practical structural design and electronic regulation are significant for synthesising efficient electrocatalysts. Therefore, a facile soft-template approach has been applied to successfully grow Ni/Mo2C heterojunction nanosheet arrays on nickel foam (NF) skeleton (NS-Ni/Mo2C@NF) using polyvinylpyrrolidone (PVP) as a soft template. The density functional theory (DFT) calculations reveal that abundant Ni/Mo2C heterojunction in NS-Ni/Mo2C@NF can provide many active sites with a moderate hydrogen adsorption free energy (ΔGH*, 0.037 eV). Benefiting from this nanosheet array structure and abundant Ni/Mo2C heterojunctions, the NS-Ni/Mo2C@NF catalyst can efficiently catalyze HER, especially at large current densities. As a result, only 151 and 271 mV overpotentials are needed to deliver 100 and 1000 mA/cm2 HER, respectively. More importantly, the hydrogen production testing with NS-Ni/Mo2C@NF as the working electrode can run stably for 500 h without activity decay under the current density of 500 mA/cm2 commonly used in industrial water electrolyzers, indicating that NS-Ni/Mo2C@NF has broad application prospects.

Item ID: 77198
Item Type: Article (Research - C1)
ISSN: 1095-7103
Keywords: Hydrogen evolution reaction; Large current density; Ni/Mo2C hetero-sheet array; Soft-template
Copyright Information: © 2022 Elsevier Inc. All rights reserved.
Research Data:
Date Deposited: 31 Jan 2023 04:53
FoR Codes: 40 ENGINEERING > 4004 Chemical engineering > 400404 Electrochemical energy storage and conversion @ 100%
SEO Codes: 17 ENERGY > 1704 Energy transformation > 170401 Fuel cells (excl. solid oxide) @ 100%
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