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Research Article

Suppressing the lattice oxygen diffusion via high-entropy oxide construction towards stabilized acidic water oxidation

Jing Ni1,2, Zhaoping Shi1,2, Yibo Wang1,2, Jiahao Yang1,2, Hongxiang Wu1,2, Pengbo Wang1,2, Kai Li3, Meiling Xiao1,2( ), Changpeng Liu1,2( ), Wei Xing1,2( )
State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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Graphical Abstract

We strategically regulate the bonding nature of Ru–O towards suppressed lattice-oxygen-mediated mechanism (LOM) via construction of the Ru-based high-entropy oxide (HEO) with increased migration energy barrier of lattice oxygen. The screened Ti23Nb9Hf13W12Ru43Ox thus exhibits 11.7 times slower lattice oxygen diffusion rate, 84% reduction in LOM ratio, and 29 times lifespan extension compared with the state-of-the-art RuO2 catalyst.

Abstract

The scale-up deployment of ruthenium (Ru)-based oxygen evolution reaction (OER) electrocatalysts in proton exchange membrane water electrolysis (PEMWE) is greatly restricted by the poor stability. As the lattice-oxygen-mediated mechanism (LOM) has been identified as the major contributor to the fast performance degradation, impeding lattice oxygen diffusion to inhibit lattice oxygen participation is imperative, yet remains challenging due to the lack of efficient approaches. Herein, we strategically regulate the bonding nature of Ru–O towards suppressed LOM via Ru-based high-entropy oxide (HEO) construction. The lattice disorder in HEOs is believed to increase migration energy barrier of lattice oxygen. As a result, the screened Ti23Nb9Hf13W12Ru43Ox exhibits 11.7 times slower lattice oxygen diffusion rate, 84% reduction in LOM ratio, and 29 times lifespan extension compared with the state-of-the-art RuO2 catalyst. Our work opens up a feasible avenue to constructing stabilized Ru-based OER catalysts towards scalable application.

Keywords

ruthenium-based high-entropy oxidesuppressing the lattice oxygen diffusionacidic oxygen evolution reaction

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Nano Research
Volume 17 Issue 3,
March 2024
Pages 1107-1113
DOI: 10.1007/s12274-023-5913-6
Cite this article:
Ni J, Shi Z, Wang Y, et al. Suppressing the lattice oxygen diffusion via high-entropy oxide construction towards stabilized acidic water oxidation. Nano Research, 2024, 17(3): 1107-1113. https://doi.org/10.1007/s12274-023-5913-6
Topics:
Oxygen evolution reaction

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Received: 11 April 2023
Revised: 29 May 2023
Accepted: 11 June 2023
Published: 08 August 2023
© Tsinghua University Press 2023
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