Issue

Vol. 7 No. 4 (2015)

Three-Dimensional Hierarchical Nanostructured Cu/Ni–Co Coating Electrode for Hydrogen Evolution Reaction in Alkaline Media

https://doi.org/10.1007/s40820-015-0049-1
Ning Wang
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Tao Hang
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Dewei Chu
School of Materials Science & Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Ming Li
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China

Corresponding Author: Dewei Chu

D.Chu@unsw.edu.au

Nano-Micro Letters, Vol. 7 No. 4 (2015), Article Number: 347-352

Abstract

In this work, three-dimensional hierarchical nickel–cobalt alloy coating for hydrogen evolution cathode was fabricated by electrodeposition processes. The coatings’ morphology evolves from sea cucumber-like nanostructure to caterpillar-like one with the increase of cobalt content. A large amount of nanometric “steps,” served as the active sites for hydrogen evolution reaction, were observed. According to Tafel polarization measurements, the exchange current density of the as-synthesized coating with hierarchical nanostructure was 21.9 times compared with that of flat nickel coating. In addition, the hierarchical coating also displayed good electrochemical stability from the galvanostatic test.

Keywords

Electrodeposition Ni–Co alloy Hierarchical Hydrogen evolution reaction
Wang, Ning, Tao Hang, Dewei Chu, and Ming Li. 2015. “Three-Dimensional Hierarchical Nanostructured Cu/Ni–Co Coating Electrode for Hydrogen Evolution Reaction in Alkaline Media”. Nano-Micro Letters 7 (4):347-52. https://doi.org/10.1007/s40820-015-0049-1.
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