Self-supporting nanoporous Ni/metallic glass composites with hierarchically porous structure for efficient hydrogen evolution reaction

被引：27

作者：

Wang, Jing ^{[1
]}

You, Li ^{[1
]}

Li, Zhibin ^{[1
]}

Liu, Xiongjun ^{[1
]}

Li, Rui ^{[1
,2
]}

Du, Qing ^{[1
]}

Wang, Xianzhen ^{[3
]}

Wang, Hui ^{[1
]}

Wu, Yuan ^{[1
]}

Jiang, Suihe ^{[1
]}

Lu, Zhaoping ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Hong Kong Polytech Univ, Dept Ind & Syst Engn, Adv Mfg Technol Res Ctr, Hong Kong, Peoples R China

[3] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 73卷

基金：

中国国家自然科学基金;

关键词：

Nanoporous Ni; Dealloying; Metallic glasses precursor; Hierarchically porous structure; Hydrogen evolution reaction; NANOWIRE ARRAYS; METALLIC-GLASS; ELECTROCATALYST; MICROSPHERES; PERFORMANCE; FABRICATION; STRESS; COPPER;

D O I：

10.1016/j.jmst.2020.09.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Searching for free-standing and cost-efficient hydrogen evolution reaction (HER) electrocatalysts with high efficiency and excellent durability remains a great challenge for the hydrogen-based energy industry. Here, we report fabrication of a unique hierarchically porous structure, i.e., nanoporous Ni (NPN)/metallic glass (MG) composite, through surface dealloying of the specially designed Ni40Zr40Ti20 MG wire. This porous composite is composed of micrometer slits staggered with nanometer pores, which not only enlarges effective surface areas for the catalytic reaction, but also facilitates the release of H-2 gas. As a result, the NPN/MG hybrid electrode exhibited the prominent HER performance with a low overpotential of 78 mV at 10 mA cm(-2) and Tafel slope of 42.4 mV dec(-1), along with outstanding stability in alkaline solutions. Outstanding catalytic properties, combining with their free-standing capability and cost efficiency, make the current composite electrode viable for HER applications. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：145 / 150

页数：6

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