A Ni-MOF nanosheet array for efficient oxygen evolution electrocatalysis in alkaline media

Chuqian Meng; Yang Cao; Yonglan Luo; Fang Zhang; Qingquan Kong; Abdulmohsen Ali Alshehri; Khalid Ahmed Alzahrani; Tingshuai Li; Qian Liu; Xuping Sun

doi:10.1039/D1QI00345C

A Ni-MOF nanosheet array for efficient oxygen evolution electrocatalysis in alkaline media†

Chuqian Meng,^a Yang Cao,^b Yonglan Luo,

^b Fang Zhang,^c Qingquan Kong,^d Abdulmohsen Ali Alshehri,^e Khalid Ahmed Alzahrani,^e Tingshuai Li,*^a Qian Liu

*^d and Xuping Sun

*^b

Author affiliations

* Corresponding authors

^a School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China
E-mail: litingshuai@uestc.edu.cn

^b Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China
E-mail: xpsun@uestc.edu.cn

^c National Engineering Research Center for Nanotechnology, No. 28 East Jiang Chuan Road, Shanghai 200241, China

^d Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
E-mail: liuqian@uestc.edu.cn

^e Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, Saudi Arabia

Abstract

Highly stable and efficient non-noble-metal electrocatalysts are strongly desired for the oxygen evolution reaction (OER) in alkaline media. In this study, we report the use of 4,4′-biphenyl dicarboxylic acid as an organic ligand to in situ develop an Ni-MOF nanosheet array on nickel foam (Ni-MOF/NF) as an OER catalyst. In 1 M KOH, such 3D Ni-MOF/NF drives a current density of 20 mA cm⁻² at a low overpotential of 350 mV. Moreover, it exhibits strong long-term electrochemical stability for at least 24 h and achieves a high turnover frequency of 0.24 mol O₂ per s at an overpotential of 400 mV.

Inorganic Chemistry Frontiers

A Ni-MOF nanosheet array for efficient oxygen evolution electrocatalysis in alkaline media†

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A Ni-MOF nanosheet array for efficient oxygen evolution electrocatalysis in alkaline media

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