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Efficient wettability-controlled electroreduction of CO2 to CO at Au/C interfaces

Author

Listed:
  • Run Shi

    (Chinese Academy of Sciences)

  • Jiahao Guo

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

  • Xuerui Zhang

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

  • Geoffrey I. N. Waterhouse

    (The University of Auckland)

  • Zhaojun Han

    (CSIRO Manufacturing)

  • Yunxuan Zhao

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

  • Lu Shang

    (Chinese Academy of Sciences)

  • Chao Zhou

    (Chinese Academy of Sciences)

  • Lei Jiang

    (Chinese Academy of Sciences)

  • Tierui Zhang

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

Abstract

The electrochemical CO2 reduction reaction (CO2RR) represents a very promising future strategy for synthesizing carbon-containing chemicals in a more sustainable way. In spite of great progress in electrocatalyst design over the last decade, the critical role of wettability-controlled interfacial structures for CO2RR remains largely unexplored. Here, we systematically modify the structure of gas-liquid-solid interfaces over a typical Au/C gas diffusion electrode through wettability modification to reveal its contribution to interfacial CO2 transportation and electroreduction. Based on confocal laser scanning microscopy measurements, the Cassie-Wenzel coexistence state is demonstrated to be the ideal three phase structure for continuous CO2 supply from gas phase to Au active sites at high current densities. The pivotal role of interfacial structure for the stabilization of the interfacial CO2 concentration during CO2RR is quantitatively analysed through a newly-developed in-situ fluorescence electrochemical spectroscopic method, pinpointing the necessary CO2 mass transfer conditions for CO2RR operation at high current densities.

Suggested Citation

  • Run Shi & Jiahao Guo & Xuerui Zhang & Geoffrey I. N. Waterhouse & Zhaojun Han & Yunxuan Zhao & Lu Shang & Chao Zhou & Lei Jiang & Tierui Zhang, 2020. "Efficient wettability-controlled electroreduction of CO2 to CO at Au/C interfaces," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16847-9
    DOI: 10.1038/s41467-020-16847-9
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    Cited by:

    1. Yan Lin & Tuo Wang & Lili Zhang & Gong Zhang & Lulu Li & Qingfeng Chang & Zifan Pang & Hui Gao & Kai Huang & Peng Zhang & Zhi-Jian Zhao & Chunlei Pei & Jinlong Gong, 2023. "Tunable CO2 electroreduction to ethanol and ethylene with controllable interfacial wettability," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    2. Jie Yin & Jing Jin & Zhouyang Yin & Liu Zhu & Xin Du & Yong Peng & Pinxian Xi & Chun-Hua Yan & Shouheng Sun, 2023. "The built-in electric field across FeN/Fe3N interface for efficient electrochemical reduction of CO2 to CO," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. Mingxu Sun & Jiamin Cheng & Miho Yamauchi, 2024. "Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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