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A broadband and strong visible-light-absorbing photosensitizer boosts hydrogen evolution

Author

Listed:
  • Ping Wang

    (Tianjin University of Technology)

  • Song Guo

    (Tianjin University of Technology)

  • Hong-Juan Wang

    (Tianjin University of Technology)

  • Kai-Kai Chen

    (Tianjin University of Technology)

  • Nan Zhang

    (Tianjin University of Technology)

  • Zhi-Ming Zhang

    (Tianjin University of Technology)

  • Tong-Bu Lu

    (Tianjin University of Technology
    Sun Yat-Sen University)

Abstract

Developing broadband and strong visible-light-absorbing photosensitizer is highly desired for dramatically improving the utilization of solar energy and boosting artificial photosynthesis. Herein, we develop a facile strategy to co-sensitize Ir-complex with Coumarins and boron dipyrromethene to explore photosensitizer with a broadband covering ca. 50% visible light region (Ir-4). This type of photosensitizer is firstly introduced into water splitting system, exhibiting significantly enhanced performance with over 21 times higher than that of typical Ir(ppy)2(bpy)+, and the turnover number towards Ir-4 reaches to 115840, representing the most active sensitizer among reported molecular photocatalytic systems. Experimental and theoretical investigations reveal that the Ir-mediation not only achieves a long-lived boron dipyrromethene-localized triplet state, but also makes an efficient excitation energy transfer from Coumarin to boron dipyrromethene to trigger the electron transfer. These findings provide an insight for developing broadband and strong visible-light-absorbing multicomponent arrays on molecular level for efficient artificial photosynthesis.

Suggested Citation

  • Ping Wang & Song Guo & Hong-Juan Wang & Kai-Kai Chen & Nan Zhang & Zhi-Ming Zhang & Tong-Bu Lu, 2019. "A broadband and strong visible-light-absorbing photosensitizer boosts hydrogen evolution," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11099-8
    DOI: 10.1038/s41467-019-11099-8
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    Cited by:

    1. Huixiang Sheng & Jin Wang & Juhui Huang & Zhuoyao Li & Guozhang Ren & Linrong Zhang & Liuyingzi Yu & Mengshuai Zhao & Xuehui Li & Gongqiang Li & Ning Wang & Chen Shen & Gang Lu, 2023. "Strong synergy between gold nanoparticles and cobalt porphyrin induces highly efficient photocatalytic hydrogen evolution," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    2. Atsushi Kobayashi & Eiichirou Muramatsu & Masaki Yoshida & Masako Kato, 2021. "Two Excited State Collaboration of Heteroleptic Ir(III)-Coumarin Complexes for H 2 Evolution Dye-Sensitized Photocatalysts," Energies, MDPI, vol. 14(9), pages 1-15, April.

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