A nanostructured nickel-cobalt alloy with an oxide layer for an efficient oxygen evolution reaction

被引：104

作者：

Wu, Lian-Kui ^{[1
]}

Wu, Wei-Yao ^{[1
]}

Xia, Jie ^{[1
]}

Cao, Hua-Zhen ^{[1
]}

Hou, Guang-Ya ^{[1
]}

Tang, Yi-Ping ^{[1
]}

Zheng, Guo-Qu ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Zhejiang, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2017年 / 5卷 / 21期

基金：

中国国家自然科学基金;

关键词：

WATER OXIDATION; SOL-GEL; CARBON NANOTUBES; NANOWIRE ARRAYS; ELECTROCATALYSTS; HYDROXIDE; NI; CATALYSTS; FILMS; ELECTRODE;

D O I：

10.1039/c7ta02754k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A nanostructured nickel-cobalt alloy with an oxide layer was fabricated and its superior catalytic activity towards the electrochemical oxygen evolution reaction in alkaline media was investigated. Firstly, a NiCo-SiO2 composite film was prepared via a potentiostatic electro-codeposition method. Then the SiO2 template was etched and the NiCo component was activated leading to the generation of a (N)iCoOx layer during consecutive CV scans in concentrated alkaline solution. The results show that this nanostructured NiCo alloy with the oxide layer can provide a current density of 100 mA cm(-2) in 1.0 M KOH at a low overpotential of 326 mV and exhibits good stability towards water oxidation. The excellent OER performance is enabled with the unique metal-oxide structure, which allows high electrical conductivity in the metal and high catalytic activity on the oxide.

引用

页码：10669 / 10677

页数：9

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