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Efficient solar-driven electrocatalytic CO2 reduction in a redox-medium-assisted system

Author

Listed:
  • Yuhang Wang

    (Fudan University)

  • Junlang Liu

    (Fudan University)

  • Yifei Wang

    (Fudan University)

  • Yonggang Wang

    (Fudan University)

  • Gengfeng Zheng

    (Fudan University)

Abstract

Solar-driven electrochemical carbon dioxide (CO2) reduction is capable of producing value-added chemicals and represents a potential route to alleviate carbon footprint in the global environment. However, the ever-changing sunlight illumination presents a substantial impediment of maintaining high electrocatalytic efficiency and stability for practical applications. Inspired by green plant photosynthesis with separate light reaction and (dark) carbon fixation steps, herein, we developed a redox-medium-assisted system that proceeds water oxidation with a nickel-iron hydroxide electrode under light illumination and stores the reduction energy using a zinc/zincate redox, which can be controllably released to spontaneously reduce CO2 into carbon monoxide (CO) with a gold nanocatalyst in dark condition. This redox-medium-assisted system enables a record-high solar-to-CO photoconversion efficiency of 15.6% under 1-sun intensity, and an outstanding electric energy efficiency of 63%. Furthermore, it allows a unique tuning capability of the solar-to-CO efficiency and selectivity by the current density applied during the carbon fixation.

Suggested Citation

  • Yuhang Wang & Junlang Liu & Yifei Wang & Yonggang Wang & Gengfeng Zheng, 2018. "Efficient solar-driven electrocatalytic CO2 reduction in a redox-medium-assisted system," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07380-x
    DOI: 10.1038/s41467-018-07380-x
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    Cited by:

    1. Chen, Zhangsen & Zhang, Gaixia & Chen, Hangrong & Prakash, Jai & Zheng, Yi & Sun, Shuhui, 2022. "Multi-metallic catalysts for the electroreduction of carbon dioxide: Recent advances and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 155(C).
    2. Agliuzza, Matteo & Mezza, Alessio & Sacco, Adriano, 2023. "Solar-driven integrated carbon capture and utilization: Coupling CO2 electroreduction toward CO with capture or photovoltaic systems," Applied Energy, Elsevier, vol. 334(C).

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