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Fluorine-expedited nitridation of layered perovskite Sr2TiO4 for visible-light-driven photocatalytic overall water splitting

Author

Listed:
  • Jinxing Yu

    (Tongji University)

  • Jie Huang

    (72 Wenhua Road
    72 Wenhua Road)

  • Ronghua Li

    (University of Electronic Science and Technology of China)

  • Yanbo Li

    (University of Electronic Science and Technology of China)

  • Gang Liu

    (72 Wenhua Road
    72 Wenhua Road)

  • Xiaoxiang Xu

    (Tongji University)

Abstract

Photocatalytic overall water splitting is a promising approach for a sustainable hydrogen provision using solar energy. For sufficient solar energy utilization, this reaction ought to be operated based on visible-light-active semiconductors, which is very challenging. In this work, an F-expedited nitridation strategy is applied to modify the wide-bandgap semiconductor Sr2TiO4 for visible-light-driven photocatalytic overall water splitting. Compared to the conventional nitridation approach, F-expedited nitridation introduces the desirable integration of a high concentration of N dopant for strong visible light absorption and a low concentration of defects (i.e. Ti3+ and oxygen vacancies) for effective separation of photocarriers. After being coated with Ti-oxyhydroxide protection layer and deposited with RhCrOy cocatalyst, the product from F-expedited nitridation can stably run photocatalytic overall water splitting with apparent quantum efficiency of 0.39% at 420 ± 20 nm and solar-to-hydrogen efficiency of 0.028%. These findings justify the effectiveness of F-expedited nitridation strategy and serve as a guidance to upgrade the photocatalytic activity of many other wide-bandgap semiconductors.

Suggested Citation

  • Jinxing Yu & Jie Huang & Ronghua Li & Yanbo Li & Gang Liu & Xiaoxiang Xu, 2025. "Fluorine-expedited nitridation of layered perovskite Sr2TiO4 for visible-light-driven photocatalytic overall water splitting," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-024-55748-z
    DOI: 10.1038/s41467-024-55748-z
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