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Constructing regulable supports via non-stoichiometric engineering to stabilize ruthenium nanoparticles for enhanced pH-universal water splitting

Author

Listed:
  • Sheng Zhao

    (Nanjing University of Aeronautics and Astronautics)

  • Sung-Fu Hung

    (National Yang Ming Chiao Tung University)

  • Liming Deng

    (Nanjing University of Aeronautics and Astronautics)

  • Wen-Jing Zeng

    (National Yang Ming Chiao Tung University)

  • Tian Xiao

    (Nanjing University of Aeronautics and Astronautics)

  • Shaoxiong Li

    (Nanjing University of Aeronautics and Astronautics)

  • Chun-Han Kuo

    (National Tsing Hua University)

  • Han-Yi Chen

    (National Tsing Hua University)

  • Feng Hu

    (Nanjing University of Aeronautics and Astronautics)

  • Shengjie Peng

    (Nanjing University of Aeronautics and Astronautics)

Abstract

Establishing appropriate metal-support interactions is imperative for acquiring efficient and corrosion-resistant catalysts for water splitting. Herein, the interaction mechanism between Ru nanoparticles and a series of titanium oxides, including TiO, Ti4O7 and TiO2, designed via facile non-stoichiometric engineering is systematically studied. Ti4O7, with the unique band structure, high conductivity and chemical stability, endows with ingenious metal-support interaction through interfacial Ti–O–Ru units, which stabilizes Ru species during OER and triggers hydrogen spillover to accelerate HER kinetics. As expected, Ru/Ti4O7 displays ultralow overpotentials of 8 mV and 150 mV for HER and OER with a long operation of 500 h at 10 mA cm−2 in acidic media, which is expanded in pH-universal environments. Benefitting from the excellent bifunctional performance, the proton exchange membrane and anion exchange membrane electrolyzer assembled with Ru/Ti4O7 achieves superior performance and robust operation. The work paves the way for efficient energy conversion devices.

Suggested Citation

  • Sheng Zhao & Sung-Fu Hung & Liming Deng & Wen-Jing Zeng & Tian Xiao & Shaoxiong Li & Chun-Han Kuo & Han-Yi Chen & Feng Hu & Shengjie Peng, 2024. "Constructing regulable supports via non-stoichiometric engineering to stabilize ruthenium nanoparticles for enhanced pH-universal water splitting," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46750-6
    DOI: 10.1038/s41467-024-46750-6
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