Enhanced activity promoted by amorphous metal oxyhydroxides on CeO2 for alkaline oxygen evolution reaction

Xun Sun; Xin Guan; Hao Feng; Dengchao Zheng; Wenli Tian; Chengyi Li; Chuiyu Li; Minglei Yan; Yadong Yao

doi:10.1016/j.jcis.2021.06.149

Enhanced activity promoted by amorphous metal oxyhydroxides on CeO₂ for alkaline oxygen evolution reaction

J Colloid Interface Sci. 2021 Dec 15:604:719-726. doi: 10.1016/j.jcis.2021.06.149. Epub 2021 Jul 7.

Authors

Xun Sun¹, Xin Guan¹, Hao Feng¹, Dengchao Zheng¹, Wenli Tian¹, Chengyi Li¹, Chuiyu Li¹, Minglei Yan², Yadong Yao³

Affiliations

¹ College of Materials Science and Engineering, Sichuan University, Chengdu 610064, Sichuan, China.
² Key Laboratory of Mesoscopic Chemistry of MOE and Jiangsu Provincial Laboratory of Nanotechnology, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, Jiangsu, China. Electronic address: minglei0722@163.com.
³ College of Materials Science and Engineering, Sichuan University, Chengdu 610064, Sichuan, China. Electronic address: yaoyadong@scu.edu.cn.

PMID: 34293530
DOI: 10.1016/j.jcis.2021.06.149

Abstract

Herein, we demonstrate a direct growth of amorphous metal oxyhydroxide (AMO) attached on CeO₂ by a galvanic replacement mechanism as advanced oxygen evolution reaction (OER) catalyst. In this unique structure, the CeO₂ substrate not only offers high specific surface area for the formation of AMO, but also provides high conductivity, guaranteeing the promoted electron transfer for the catalytic reaction. In addition, the AMO on the surface of the CeO₂ exposes abundant active sites for the OER. Benefiting from the above advantages, the as-prepared AMO@CeO₂ supported on nickel foam (AMO@CeO₂/NF) exhibits excellent OER performance with low overpotential of 261 mV at 10 mA cm^-2, high turnover frequency of 0.07 s^-1 at 20 mA cm^-2 and superior stability in 1.0 M KOH.

Keywords: Amorphous metal oxyhydroxides; Cerium oxide; Electrocatalysts; Oxygen evolution reaction.