High performance of Co–P/NF electrocatalyst for oxygen evolution reaction

Zunhang Lv, Yue Zhang, Kaihang Wang, Tianpeng Yu, 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

Abstract:

One of the main challenges for electrochemical water splitting is to develop low-cost and efficient oxygen evolution anode materials. In this work, the Co–P alloys as efficient electrocatalysts for oxygen evolution reaction in alkaline media have been successfully synthesized by using electroless plating under mild conditions. SEM, TEM and XRD characterization show that the amorphous Co–P/NF electrocatalysts have rough surface structures, exposing more active sites for oxygen evolution reaction. The electrochemical measurements confirm that Co–P alloys have excellent activity for oxygen evolution reaction, with an overpotential of 306 mV (at j ¼ 10 mA cm- 2), a lower Tafel slope of 51.1 mV dec -1 and long-term stability (>25 h) under alkaline conditions (1.0 M KOH).

Keywords: Oxygen evolution reaction Co–P alloy Amorphous materials Electrocatalysis

Corresponding authors:

xiegw@qust.edu.cn (G. Xie), luhuajiang@qust.edu.cn (L. Jiang).

https://doi.org/10.1016/j.matchemphys.2019.121772