Potentiostatic electrodeposition of self-supported NiS electrocatalyst supported on Ni foam for efficient hydrogen evolution

Materials & Design

Jingjing Sun¹  Zhenjian Gu²  Yuxin Wang³  Yihui Wu⁴  Zhen He⁴  Jiqiong Lian⁵ 

[1] Corresponding author at: School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China.;Corresponding author.;Fujian Key Laboratory of Functional Materials and Applications (Xiamen University of Technology), Xiamen 361024, China;School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China;

关键词: Potentiostatic electrodeposition;    Ni–S electrocatalyst;    Hydrogen evolution reaction;    Alkaline media;   

DOI  :  

来源: DOAJ

【 摘 要 】

The commercial production of H2 from water splitting requires highly efficient, low-cost, and stable earth-abundant electrocatalysts to speed up the kinetics of hydrogen evolution reaction (HER). In this study, we proposed a concise and effective strategy for fabricating NiS electrocatalysts on Ni foam (NF) substrate to serve as HER electrocatalysts during potentiostatic electrodeposition. The NiS electrocatalyst shows a cauliflower-like surface morphology when the electrodeposition voltage is adjusted. The proposed electrocatalyst exhibits excellent HER performance with a low overpotential of 58 mV at 10 mA·cm−2 and a small Tafel slope of 81.6 mV·dec−1 in 1.0 M KOH solution. Such a high performance can be attributed to the amorphous phase structures, high conductivity, composition optimization, and the close combination between the electrocatalyst and NF. This study provides a facile, fast, and feasible avenue for developing highly efficient and affordable electrochemical catalysts for HER.

【 授权许可】

Unknown