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

被引：105
|
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
收藏
页码：10669 / 10677
页数：9
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