Volume 62, Issue 38 e202308704
Research Article

Low Ruthenium Content Confined on Boron Carbon Nitride as an Efficient and Stable Electrocatalyst for Acidic Oxygen Evolution Reaction

Xiaofang Bai

Xiaofang Bai

Department of Materials Science and Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

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Xiuping Zhang

Xiuping Zhang

Department of Materials Science and Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

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Yujiao Sun

Yujiao Sun

Department of Materials Science and Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

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Mingcheng Huang

Mingcheng Huang

Department of Materials Science and Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

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Prof. Dr. Jiantao Fan

Prof. Dr. Jiantao Fan

Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

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Prof. Dr. Shaoyi Xu

Corresponding Author

Prof. Dr. Shaoyi Xu

Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

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Prof. Dr. Hui Li

Corresponding Author

Prof. Dr. Hui Li

Department of Materials Science and Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

Shenzhen Key Laboratory of Hydrogen Energy, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China

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First published: 25 July 2023
Citations: 19

Graphical Abstract

Ru nanoparticles immobilized on a stable boron carbon nitride (BCN) nanosheet support show excellent oxygen evolution reaction (OER) activity and stability. The coordination of introduced B and active N sites in BCN provides strong interaction between the Ru and the support, which facilitates Ru dispersity and promotes the catalyst's stability. Density functional theory (DFT) calculations reveal that the BCN support can reduce the OER energy barrier and change the adsorption capacity for intermediate products.

Abstract

To date, only a few noble metal oxides exhibit the required efficiency and stability as oxygen evolution reaction (OER) catalysts under the acidic, high-voltage conditions that exist during proton exchange membrane water electrolysis (PEMWE). The high cost and scarcity of these catalysts hinder the large-scale application of PEMWE. Here, we report a novel OER electrocatalyst for OER comprised of uniformly dispersed Ru clusters confined on boron carbon nitride (BCN) support. Compared to RuO2, our BCN-supported catalyst shows enhanced charge transfer. It displays a low overpotential of 164 mV at a current density of 10 mA cm−2, suggesting its excellent OER catalytic activity. This catalyst was able to operate continuously for over 12 h under acidic conditions, whereas RuO2 without any support fails in 1 h. Density functional theory (DFT) calculations confirm that the interaction between the N on BCN support and Ru clusters changes the adsorption capacity and reduces the OER energy barrier, which increases the electrocatalytic activity of Ru.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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