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

Author

Listed:
  • Yi Wang

    (Chinese Academy of Sciences
    Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Rong Yang

    (Chinese Academy of Sciences
    Chinese Academy of Sciences
    Tianjin University)

  • Yajun Ding

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Bo Zhang

    (Dalian Institute of Chemical Physics Chinese Academy of Sciences)

  • Hao Li

    (Chinese Academy of Sciences
    School of Nano Technology and Nano Bionics University of Science and Technology of China)

  • Bing Bai

    (Chinese Academy of Sciences
    Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Mingrun Li

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Yi Cui

    (Chinese Academy of Sciences
    School of Nano Technology and Nano Bionics University of Science and Technology of China)

  • Jianping Xiao

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Zhong-Shuai Wu

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

Abstract

Exploring durable electrocatalysts with high activity for oxygen evolution reaction (OER) in acidic media is of paramount importance for H2 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-RuO2, 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-RuO2 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.

Suggested Citation

  • Yi Wang & Rong Yang & Yajun Ding & Bo Zhang & Hao Li & Bing Bai & Mingrun Li & Yi Cui & Jianping Xiao & Zhong-Shuai Wu, 2023. "Unraveling oxygen vacancy site mechanism of Rh-doped RuO2 catalyst for long-lasting acidic water oxidation," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37008-8
    DOI: 10.1038/s41467-023-37008-8
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    References listed on IDEAS

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    2. Lingxi Zhou & Yangfan Shao & Fang Yin & Jia Li & Feiyu Kang & Ruitao Lv, 2023. "Stabilizing non-iridium active sites by non-stoichiometric oxide for acidic water oxidation at high current density," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    3. Yizhen Lu & Bixuan Li & Na Xu & Zhihua Zhou & Yu Xiao & Yu Jiang & Teng Li & Sheng Hu & Yongji Gong & Yang Cao, 2023. "One-atom-thick hexagonal boron nitride co-catalyst for enhanced oxygen evolution reactions," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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