Cited by 547Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCO2 Reduction Techniques and Catalysts

Unraveling oxygen vacancy site mechanism of Rh-doped RuO2 catalyst for long-lasting acidic water oxidation

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Wang, Yi, Yang, Rong, Ding, Yajun, Zhang, Bo, Li, Hao, Bai, Bing, Li, Mingrun, Cui, Yi +2 more·2023·Nature Communications

Abstract

Exploring durable electrocatalysts with high activity for oxygen evolution reaction (OER) in acidic media is of paramount importance for H 2 production via polymer electrolyte membrane electrolyzers, yet it remains urgently challenging. Herein, we report a synergistic strategy of Rh doping and surface oxygen vacancies to precisely regulate unconventional OER reaction path via the Ru–O–Rh active sites of Rh-RuO 2 , simultaneously boosting intrinsic activity and stability. The stabilized low-valent catalyst exhibits a remarkable performance, with an overpotential of 161 mV at 10 mA cm −2 and activity retention of 99.2% exceeding 700 h at 50 mA cm −2 . Quasi in situ/operando characterizations demonstrate the recurrence of reversible oxygen species under working potentials for enhanced activity and durability. It is theoretically revealed that Rh-RuO 2 passes through a more optimal reaction path of lattice oxygen mediated mechanism-oxygen vacancy site mechanism induced by the synergistic interaction of defects and Ru–O–Rh active sites with the rate-determining step of *O formation, breaking the barrier limitation (*OOH) of the traditional adsorption evolution mechanism.

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Crossref · 10.1038/s41467-023-37008-8

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  • Introduction of some transition metals (Mn, Ni, Nb, Rh) into RuO2 can significantly improve the electrocatalytic activity and stability toward OER in acidic conditions by reducing the adsorption of oxygen intermediates on active Ru sites.

    “recent studies have shown that the introduction of some transition metals (Mn, Ni, Nb, Rh) into RuO2 can significantly improve the electrocatalytic activity and stability toward OER in acidic conditions by reducing the adsorption of oxygen intermediates on active Ru sites.[ 25 , 26 , 27 , 28 ]”

    From Highly Active and Stable Alkaline Hydrogen Evolution Electrocatalyst Based on Ir‐Incorporated Partially Oxidized Ru Aerogel under Industrial‐Level Current Density (2024) · cites this paper as [27]

    The Results (Electrocatalysis of OER; page unavailable) show that Rh-doped RuO2 improves activity and durability in acidic electrolyte. The Introduction and Results describe oxygen vacancies and optimized adsorption and desorption of intermediates, but do not establish reduced adsorption on active Ru sites as the mechanism. This paper does not substantiate the claim for Mn, Ni, or Nb doping. (LLM, conf=0.88)

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Authors
Wang, Y., Yang, R., Ding, Y., Zhang, B., Li, H., Bai, B., Li, M., Cui, Y., Xiao, J., & Wu, Z.-S.
Affiliations
  • Dalian Institute of Chemical Physics (CN)
  • Tianjin University (CN)
  • University of Science and Technology of China (CN)
Corresponding author
  • Xiao, Jianping
  • Wu, Zhong-Shuai
Venue
Nature Communications
Published
2023-03-14
Volume
14
Issue
1
Pages
1412-1412
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4324141467
Cited by
547
References
69
Citations by year
2026: 144 · 2025: 216 · 2024: 146 · 2023: 41
FWCI
26.13
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Salt Science Research Foundation (BL14W1)
  • National Natural Science Foundation of China (91945302, 22125903, 51872283, 22172156, 2019RT09, 22172156, 22125 903, 51872283)
  • Chinese Academy of Sciences (DNL202016, DNL202003, DNL202019, XDB36030200, 2019RT09)
  • Dalian Institute of Chemical Physics (DICP I2020032, I2020032)
  • Dalian National Laboratory for Clean Energy (DNL202019, DNL-YL A202205, DNL202016, DNL 202003, DICP I2020032)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
Keywords
oxygen evolution reaction, RuO2 electrocatalyst, rhodium doping, oxygen vacancies, acidic water oxidation, proton exchange membrane electrolyzer, hydrogen production, lattice oxygen mechanism, reaction mechanism, catalyst stability, operando characterization

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