Oxygen vacancy-rich defective Co3O4–RuO2 heterostructure catalysts for efficient acidic oxygen evolution reaction

Li Li; Guang Yang; Chengzhi Xiao; Litao Zhao; Jianhua Xu; Wenli Wang; Guoliang Gao; Yi Cui

doi:10.1039/D5CC02731D

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Oxygen vacancy-rich defective Co₃O₄–RuO₂ heterostructure catalysts for efficient acidic oxygen evolution reaction†

Li Li,^a Guang Yang,^b Chengzhi Xiao,^a Litao Zhao,^a Jianhua Xu,^a Wenli Wang,^c Guoliang Gao

*^ab and Yi Cui*^b

Author affiliations

* Corresponding authors

^a Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, China

^b i-lab, Vacuum Interconnected Nanotech Workstation, Suzhou Institute of Nano-Tech and NanoBionics, Chinese Academy of Sciences, Suzhou 215123, China

^c Jiangsu Engineering Research Center of Textile Dyeing and Finishing for Energy Conservation, Soochow University, Suzhou 215123, China

Abstract

This study develops a Co₃O₄–RuO₂ heterojunction catalyst for the acidic oxygen evolution reaction (OER). The presence of oxygen vacancies at the heterointerface, along with the electronic coupling synergistically enhances OER activity. This results in a low overpotential of 218 mV at 10 mA cm⁻², demonstrating its potential for efficient hydrogen production through proton exchange membrane water electrolysis.

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Article information

DOI: https://doi.org/10.1039/D5CC02731D
Article type: Communication
Submitted: 15 May 2025
Accepted: 11 Jul 2025
First published: 25 Jul 2025

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Chem. Commun., 2025, Advance Article

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Oxygen vacancy-rich defective Co₃O₄–RuO₂ heterostructure catalysts for efficient acidic oxygen evolution reaction

L. Li, G. Yang, C. Xiao, L. Zhao, J. Xu, W. Wang, G. Gao and Y. Cui, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC02731D

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