Mengjin Wen, Zihan Li, Rui Wang, Zhengmin Li, Xin Liu, Guixue Wang, Guangwen Xie*, Luhua Jiang*

College of Materials Science and Engineering, Qingdao University of Science and Technology

No.53 Zhengzhou Road, Qingdao 266042, China

* E-mails: xiegw@qust.edu.cn (G. Xie), luhuajiang@qust.edu.cn (L. Jiang)

Abstract:

A new type of superior activity and highly cost-effective amorphous electrocatalyst Co-Mo-Fe on nickel foam (NF) supports is prepared by facile one-step rapid electrodeposition. The amorphous electrocatalyst Co-Mo-Fe/NF shows excellent oxygen evolution reaction (OER) performance, with a small overpotential of 218 mV at 10 mA cm-2 current density in 1 M KOH. It only needs overpotential of 252 mV at 50 mA cm-2 current density in 1 M KOH, and the Tafel slope is 45 mV dec-1. The results show that the doping of Fe significantly improves the oxygen evolution capacity of the Co-Mo-Fe system. The synergistic effect of the three metals and the doping of the third metal iron make the oxygen evolution active sites of the whole system increase significantly. This provides a feasible direction for the oxygen evolution reaction of cobalt transition metal.

Keywords: electrodeposition; oxygen evolution reaction; electrocatalyst

https://doi.org/10.1016/j.ijhydene.2022.02.001