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Photocatalytic hydrogen peroxide splitting on metal-free powders assisted by phosphoric acid as a stabilizer

Author

Listed:
  • Yasuhiro Shiraishi

    (Osaka University)

  • Yuki Ueda

    (Osaka University)

  • Airu Soramoto

    (Osaka University)

  • Satoshi Hinokuma

    (Kumamoto University)

  • Takayuki Hirai

    (Osaka University)

Abstract

Hydrogen peroxide (H2O2) has received increasing attention as an energy carrier. To achieve a sustainable energy society, photocatalytic H2O2 splitting (H2O2 (l) → H2 (g) + O2 (g); ΔG° = + 131 kJ mol−1) is a desirable reaction for on-site H2 generation. However, this reaction has not been reported because conventional photocatalysis decomposes H2O2 by disproportionation (H2O2 (l) → H2O (l) + 1/2O2 (g); ΔG° = −117 kJ mol−1) and by promoting H2O2 reduction instead of H+ reduction. Here we report the successful example of H2O2 splitting. Visible light irradiation of a graphitic carbon nitride loaded with graphene quantum dots as co-catalysts (GQDs/g-C3N4) in a H2O2 solution containing phosphoric acid (H3PO4) produces H2. H3PO4 associates with H2O2 via hydrogen bonding, and this stabilization of H2O2 suppresses its reduction, thus promoting H+ reduction. The all-organic photosystem with H3PO4 as a stabilizer may provide a basis of photocatalytic H2O2 splitting.

Suggested Citation

  • Yasuhiro Shiraishi & Yuki Ueda & Airu Soramoto & Satoshi Hinokuma & Takayuki Hirai, 2020. "Photocatalytic hydrogen peroxide splitting on metal-free powders assisted by phosphoric acid as a stabilizer," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17216-2
    DOI: 10.1038/s41467-020-17216-2
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    Cited by:

    1. Tian Liu & Zhenhua Pan & Junie Jhon M. Vequizo & Kosaku Kato & Binbin Wu & Akira Yamakata & Kenji Katayama & Baoliang Chen & Chiheng Chu & Kazunari Domen, 2022. "Overall photosynthesis of H2O2 by an inorganic semiconductor," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Tian Liu & Zhenhua Pan & Kosaku Kato & Junie Jhon M. Vequizo & Rito Yanagi & Xiaoshan Zheng & Weilai Yu & Akira Yamakata & Baoliang Chen & Shu Hu & Kenji Katayama & Chiheng Chu, 2022. "A general interfacial-energetics-tuning strategy for enhanced artificial photosynthesis," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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