Zhang-Rice singlets state formed by two-step oxidation for triggering water oxidation under operando conditions

Chun Kuo Peng, Yu Chang Lin, Chao Lung Chiang, Zhengxin Qian, Yu Cheng Huang, Chung Li Dong, Jian Feng Li*, Chien Te Chen, Zhiwei Hu*, San Yuan Chen*, Yan Gu Lin*

*此作品的通信作者

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

The production of ecologically compatible fuels by electrochemical water splitting is highly desirable for modern industry. The Zhang-Rice singlet is well known for the superconductivity of high-temperature superconductors cuprate, but is rarely known for an electrochemical catalyst. Herein, we observe two steps of surface reconstruction from initial catalytic inactive Cu1+ in hydrogen treated Cu2O to Cu2+ state and further to catalytic active Zhang-Rice singlet state during the oxygen evolution reaction for water splitting. The hydrogen treated Cu2O catalyst exhibits a superior catalytic activity and stability for water splitting and is an efficient rival of other 3d-transition-metal catalysts. Multiple operando spectroscopies indicate that Zhang-Rice singlet is real active species, since it appears only under oxygen evolution reaction condition. This work provides an insight in developing an electrochemical catalyst from catalytically inactive materials and improves understanding of the mechanism of a Cu-based catalyst for water oxidation.

原文English
文章編號529
期刊Nature Communications
14
發行號1
DOIs
出版狀態Published - 12月 2023

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