Electrochemically fabricated hierarchical porous Ni(OH)2/NiCu electrodes for hydrogen evolution reaction

被引:30
作者
Yin, Zuwei [1 ]
Chen, Fuyi [1 ]
机构
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
基金
中国国家自然科学基金;
关键词
Hydrogen evolution reaction; Hierarchical porous architecture; Brush plating; Selective dissolution; Nickel hydroxide; CU-NI ALLOY; CORROSION PERFORMANCE; WATER ELECTROLYSIS; NANOPOROUS NICKEL; COATINGS; CATALYSTS; DEPOSITION; BEHAVIOR;
D O I
10.1016/j.electacta.2013.11.102
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A hierarchical porous Ni(OH)(2)/NiCu electrode was fabricated by a novel electrochemical method, which included brush plating, cyclic voltammetty (CV) treatment, electrochemical dealloying and hydrolysis. We firstly discussed the feasibility of using brushing plating to produce NiCu precursors. Then we found that the CV treatment can be used to yield a roughened NiCu surface; thereafter, the selective dissolution of Cu can be used to further improve the surface area. Through controlling the cycle number and time of dealloying, we can get a hierarchical porous NiCu which exhibit highest hydrogen evolution reaction activity. Subsequently, the obtained hierarchical porous NiCu immersed in 0.1 M NiCl2 to get a hierarchical porous Ni(OH)(2)/NiCu electrode. The influence of immersing time was also discussed. The fabricated hierarchical porous Ni(OH)(2)/NiCu electrode exhibits higher hydrogen evolution reaction (HER) activity than those of the brush-plated NiCu and porous NiCu electrodes, which can be attributed to the unique hierarchical porous structure and the synergy between the Ni(OH)(2) and NiCu surfaces. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:84 / 91
页数:8
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