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Sub-50 nm perovskite-type tantalum-based oxynitride single crystals with enhanced photoactivity for water splitting

Author

Listed:
  • Jiadong Xiao

    (Shinshu University)

  • Mamiko Nakabayashi

    (The University of Tokyo)

  • Takashi Hisatomi

    (Shinshu University)

  • Junie Jhon M. Vequizo

    (Shinshu University)

  • Wenpeng Li

    (Shinshu University)

  • Kaihong Chen

    (Shinshu University)

  • Xiaoping Tao

    (Shinshu University)

  • Akira Yamakata

    (Okayama University)

  • Naoya Shibata

    (The University of Tokyo)

  • Tsuyoshi Takata

    (Shinshu University)

  • Yasunobu Inoue

    (Japan Technological Research Association of Artificial Photosynthetic Chemical Process (ARPChem))

  • Kazunari Domen

    (Shinshu University
    The University of Tokyo)

Abstract

A long-standing trade-off exists between improving crystallinity and minimizing particle size in the synthesis of perovskite-type transition-metal oxynitride photocatalysts via the thermal nitridation of commonly used metal oxide and carbonate precursors. Here, we overcome this limitation to fabricate ATaO2N (A = Sr, Ca, Ba) single nanocrystals with particle sizes of several tens of nanometers, excellent crystallinity and tunable long-wavelength response via thermal nitridation of mixtures of tantalum disulfide, metal hydroxides (A(OH)2), and molten-salt fluxes (e.g., SrCl2) as precursors. The SrTaO2N nanocrystals modified with a tailored Ir–Pt alloy@Cr2O3 cocatalyst evolved H2 around two orders of magnitude more efficiently than the previously reported SrTaO2N photocatalysts, with a record solar-to-hydrogen energy conversion efficiency of 0.15% for SrTaO2N in Z-scheme water splitting. Our findings enable the synthesis of perovskite-type transition-metal oxynitride nanocrystals by thermal nitridation and pave the way for manufacturing advanced long-wavelength-responsive particulate photocatalysts for efficient solar energy conversion.

Suggested Citation

  • Jiadong Xiao & Mamiko Nakabayashi & Takashi Hisatomi & Junie Jhon M. Vequizo & Wenpeng Li & Kaihong Chen & Xiaoping Tao & Akira Yamakata & Naoya Shibata & Tsuyoshi Takata & Yasunobu Inoue & Kazunari D, 2023. "Sub-50 nm perovskite-type tantalum-based oxynitride single crystals with enhanced photoactivity for water splitting," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43838-3
    DOI: 10.1038/s41467-023-43838-3
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    References listed on IDEAS

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    1. Yu Qi & Jiangwei Zhang & Yuan Kong & Yue Zhao & Shanshan Chen & Deng Li & Wei Liu & Yifan Chen & Tengfeng Xie & Junyan Cui & Can Li & Kazunari Domen & Fuxiang Zhang, 2022. "Unraveling of cocatalysts photodeposited selectively on facets of BiVO4 to boost solar water splitting," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. M. Jansen & H. P. Letschert, 2000. "Inorganic yellow-red pigments without toxic metals," Nature, Nature, vol. 404(6781), pages 980-982, April.
    3. Zheng Wang & Ying Luo & Takashi Hisatomi & Junie Jhon M. Vequizo & Sayaka Suzuki & Shanshan Chen & Mamiko Nakabayashi & Lihua Lin & Zhenhua Pan & Nobuko Kariya & Akira Yamakata & Naoya Shibata & Tsuyo, 2021. "Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
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