Construction of a ruthenium-doped CoFe-layered double hydroxide as a bifunctional electrocatalyst for overall water splitting

Wenxin Ning; Rui Wang; Xiaoxia Li; Ming Hua Wang; Hao Guan Xu; Hao Yang Lin; Xiao Peng Fu; Mengmin Wang; Peng Fei Liu; Hua Gui Yang

doi:10.1039/d3cc03260d

Construction of a ruthenium-doped CoFe-layered double hydroxide as a bifunctional electrocatalyst for overall water splitting

Chem Commun (Camb). 2023 Oct 4;59(79):11803-11806. doi: 10.1039/d3cc03260d.

Authors

Affiliations

¹ Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China. pfliu@ecust.edu.cn.
² China General Nuclear New Energy Holdings Co., Ltd, Beijing, 100071, China.

PMID: 37721035
DOI: 10.1039/d3cc03260d

Abstract

In this study, ruthenium-doped CoFe-based layered double hydroxides on Ni foam (CoFe-ZLDH/Ru@NF) were fabricated via an etching-precipitation strategy. The resultant CoFe-ZLDH/Ru@NF exhibited excellent activity, showing low overpotentials of 219.8 mV and 60.9 mV to reach the current density of 10 mA cm^-2 for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. As a bifunctional electrocatalyst, it was assembled in an anion exchange membrane water electrolyser (AEMWE) unit, performing as an anode and cathode simultaneously, which only required a cell voltage of 2.33 V to accomplish the industrial level current density of 1 A cm^-2 and operated steadily for over 12 h, making it promising for utilization in hydrogen production.