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Construction of 3D copper-chitosan-gas diffusion layer electrode for highly efficient CO2 electrolysis to C2+ alcohols

Author

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  • Jiahui Bi

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Pengsong Li

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jiyuan Liu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Shuaiqiang Jia

    (East China Normal University Shanghai)

  • Yong Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Qinggong Zhu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zhimin Liu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Buxing Han

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    East China Normal University Shanghai)

Abstract

High-rate electrolysis of CO2 to C2+ alcohols is of particular interest, but the performance remains far from the desired values to be economically feasible. Coupling gas diffusion electrode (GDE) and 3D nanostructured catalysts may improve the efficiency in a flow cell of CO2 electrolysis. Herein, we propose a route to prepare 3D Cu-chitosan (CS)-GDL electrode. The CS acts as a “transition layer” between Cu catalyst and the GDL. The highly interconnected network induces growth of 3D Cu film, and the as-prepared integrated structure facilitates rapid electrons transport and mitigates mass diffusion limitations in the electrolysis. At optimum conditions, the C2+ Faradaic efficiency (FE) can reach 88.2% with a current density (geometrically normalized) as high as 900 mA cm−2 at the potential of −0.87 V vs. reversible hydrogen electrode (RHE), of which the C2+ alcohols selectivity is 51.4% with a partial current density of 462.6 mA cm−2, which is very efficient for C2+ alcohols production. Experimental and theoretical study indicates that CS induces growth of 3D hexagonal prismatic Cu microrods with abundant Cu (111)/Cu (200) crystal faces, which are favorable for the alcohol pathway. Our work represents a novel example to design efficient GDEs for electrocatalytic CO2 reduction (CO2RR).

Suggested Citation

  • Jiahui Bi & Pengsong Li & Jiyuan Liu & Shuaiqiang Jia & Yong Wang & Qinggong Zhu & Zhimin Liu & Buxing Han, 2023. "Construction of 3D copper-chitosan-gas diffusion layer electrode for highly efficient CO2 electrolysis to C2+ alcohols," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38524-3
    DOI: 10.1038/s41467-023-38524-3
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    References listed on IDEAS

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    1. Zhonghao Tan & Jianling Zhang & Yisen Yang & Jiajun Zhong & Yingzhe Zhao & Yunan Teng & Buxing Han & Zhongjun Chen, 2025. "Polymeric ionic liquid promotes acidic electrocatalytic CO2 conversion to multicarbon products with ampere level current on Cu," Nature Communications, Nature, vol. 16(1), pages 1-11, December.

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