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Circumventing bottlenecks in H2O2 photosynthesis over carbon nitride with iodine redox chemistry and electric field effects

Author

Listed:
  • Chang-Wei Bai

    (Chongqing University)

  • Lian-Lian Liu

    (University of Science and Technology of China)

  • Jie-Jie Chen

    (University of Science and Technology of China)

  • Fei Chen

    (Chongqing University)

  • Zhi-Quan Zhang

    (Chongqing University)

  • Yi-Jiao Sun

    (Chongqing University)

  • Xin-Jia Chen

    (Chongqing University)

  • Qi Yang

    (Hunan University)

  • Han-Qing Yu

    (University of Science and Technology of China)

Abstract

Artificial photosynthesis using carbon nitride (g-C3N4) holds a great promise for sustainable and cost-effective H2O2 production, but the high carrier recombination rate impedes its efficiency. To tackle this challenge, we propose an innovative method involving multispecies iodine mediators (I−/I3−) intercalation through a pre-photo-oxidation process using potassium iodide (suspected deteriorated “KI”) within the g-C3N4 framework. Moreover, we introduce an external electric field by incorporating cationic methyl viologen ions to establish an auxiliary electron transfer channel. Such a unique design drastically improves the separation of photo-generated carriers, achieving an impressive H2O2 production rate of 46.40 mmol g−1 h−1 under visible light irradiation, surpassing the most visible-light H2O2-producing systems. Combining various advanced characterization techniques elucidates the inner photocatalytic mechanism, and the application potential of this photocatalytic system is validated with various simulation scenarios. This work presents a significative strategy for preparing and applying highly efficient g-C3N4-based catalysts in photochemical H2O2 production.

Suggested Citation

  • Chang-Wei Bai & Lian-Lian Liu & Jie-Jie Chen & Fei Chen & Zhi-Quan Zhang & Yi-Jiao Sun & Xin-Jia Chen & Qi Yang & Han-Qing Yu, 2024. "Circumventing bottlenecks in H2O2 photosynthesis over carbon nitride with iodine redox chemistry and electric field effects," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49046-x
    DOI: 10.1038/s41467-024-49046-x
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    References listed on IDEAS

    as
    1. Zhixuan Wei & Woochul Shin & Heng Jiang & Xianyong Wu & William F. Stickle & Gang Chen & Jun Lu & P. Alex Greaney & Fei Du & Xiulei Ji, 2019. "Reversible intercalation of methyl viologen as a dicationic charge carrier in aqueous batteries," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    2. Yaning Zhang & Chengsi Pan & Gaoming Bian & Jing Xu & Yuming Dong & Ying Zhang & Yang Lou & Weixu Liu & Yongfa Zhu, 2023. "H2O2 generation from O2 and H2O on a near-infrared absorbing porphyrin supramolecular photocatalyst," Nature Energy, Nature, vol. 8(4), pages 361-371, April.
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