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Hydrogen-substituted graphdiyne encapsulated cuprous oxide photocathode for efficient and stable photoelectrochemical water reduction

Author

Listed:
  • Xue Zhou

    (East China Normal University)

  • Baihe Fu

    (East China Normal University)

  • Linjuan Li

    (East China Normal University)

  • Zheng Tian

    (East China Normal University)

  • Xiankui Xu

    (East China Normal University)

  • Zihao Wu

    (East China Normal University
    Peking University)

  • Jing Yang

    (East China Normal University
    Fudan University)

  • Zhonghai Zhang

    (East China Normal University)

Abstract

Photoelectrochemical (PEC) water splitting is an appealing approach for “green” hydrogen generation. The natural p-type semiconductor of Cu2O is one of the most promising photocathode candidates for direct hydrogen generation. However, the Cu2O-based photocathodes still suffer severe self-photo-corrosion and fast surface electron-hole recombination issues. Herein, we propose a facile in-situ encapsulation strategy to protect Cu2O with hydrogen-substituted graphdiyne (HsGDY) and promote water reduction performance. The HsGDY encapsulated Cu2O nanowires (HsGDY@Cu2O NWs) photocathode demonstrates a high photocurrent density of −12.88 mA cm−2 at 0 V versus the reversible hydrogen electrode under 1 sun illumination, approaching to the theoretical value of Cu2O. The HsGDY@Cu2O NWs photocathode as well as presents excellent stability and contributes an impressive hydrogen generation rate of 218.2 ± 11.3 μmol h−1cm−2, which value has been further magnified to 861.1 ± 24.8 μmol h−1cm−2 under illumination of concentrated solar light. The in-situ encapsulation strategy opens an avenue for rational design photocathodes for efficient and stable PEC water reduction.

Suggested Citation

  • Xue Zhou & Baihe Fu & Linjuan Li & Zheng Tian & Xiankui Xu & Zihao Wu & Jing Yang & Zhonghai Zhang, 2022. "Hydrogen-substituted graphdiyne encapsulated cuprous oxide photocathode for efficient and stable photoelectrochemical water reduction," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-33445-z
    DOI: 10.1038/s41467-022-33445-z
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    References listed on IDEAS

    as
    1. Dingwang Huang & Lintao Li & Kang Wang & Yan Li & Kuang Feng & Feng Jiang, 2021. "Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    2. Carlos G. Morales-Guio & S. David Tilley & Heron Vrubel & Michael Grätzel & Xile Hu, 2014. "Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst," Nature Communications, Nature, vol. 5(1), pages 1-7, May.
    3. Yanhao Yu & Zheng Zhang & Xin Yin & Alexander Kvit & Qingliang Liao & Zhuo Kang & Xiaoqin Yan & Yue Zhang & Xudong Wang, 2017. "Enhanced photoelectrochemical efficiency and stability using a conformal TiO2 film on a black silicon photoanode," Nature Energy, Nature, vol. 2(6), pages 1-7, June.
    4. Tao Zhang & Yang Hou & Volodymyr Dzhagan & Zhongquan Liao & Guoliang Chai & Markus Löffler & Davide Olianas & Alberto Milani & Shunqi Xu & Matteo Tommasini & Dietrich R. T. Zahn & Zhikun Zheng & Ehren, 2018. "Copper-surface-mediated synthesis of acetylenic carbon-rich nanofibers for active metal-free photocathodes," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
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