A brush-like Cu2O-CoO core-shell nanoarray: an efficient bifunctional electrocatalyst for overall seawater splitting

Lisi Xie; Qian Liu; Xun He; Yongsong Luo; Dongdong Zheng; Shengjun Sun; Asmaa Farouk; Mohamed S Hamdy; Jun Liu; Qingquan Kong; Xuping Sun

doi:10.1039/d3cc02359a

A brush-like Cu₂O-CoO core-shell nanoarray: an efficient bifunctional electrocatalyst for overall seawater splitting

Chem Commun (Camb). 2023 Aug 22;59(68):10303-10306. doi: 10.1039/d3cc02359a.

Authors

Lisi Xie¹, Qian Liu¹, Xun He², Yongsong Luo², Dongdong Zheng², Shengjun Sun³, Asmaa Farouk⁴, Mohamed S Hamdy⁴, Jun Liu⁵, Qingquan Kong¹, Xuping Sun^{2

3}

Affiliations

¹ Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China. kongqingquan@cdu.edu.cn.
² Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China. xpsun@uestc.edu.cn.
³ College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, Shandong, China.
⁴ Department of Chemistry, College of Science, King Khalid University, Abha 61413, Saudi Arabia.
⁵ Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China. hxheadneckjunl@163.com.

PMID: 37548248
DOI: 10.1039/d3cc02359a

Abstract

Herein, a brush-like Cu₂O-CoO core-shell nanoarray on copper foam (Cu₂O-CoO/CF) can achieve efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance in alkaline seawater electrolyte. This Cu₂O-CoO/CF shows overpotentials as low as 315 and 295 mV at 100 mA cm^-2 for the OER and HER, respectively. Moreover, it could also be operated at 1.82 V with 100 mA cm^-2 in a two-electrode electrolyzer and exhibits strong stability for at least 50 hours of electrolysis. The excellent performance and hierarchical structure advantages of Cu₂O-CoO/CF provide new ideas for designing efficient seawater splitting electrocatalysts.