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Oxidation of metallic Cu by supercritical CO2 and control synthesis of amorphous nano-metal catalysts for CO2 electroreduction

Author

Listed:
  • Chunjun Chen

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

  • Xupeng Yan

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

  • Yahui Wu

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

  • Xiudong Zhang

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

  • Shoujie Liu

    (Chemistry and Chemical Engineering of Guangdong Laboratory)

  • Fanyu Zhang

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

  • Xiaofu Sun

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

  • Qinggong Zhu

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

  • Lirong Zheng

    (Chinese Academy of Sciences)

  • Jing Zhang

    (Chinese Academy of Sciences)

  • Xueqing Xing

    (Chinese Academy of Sciences)

  • Zhonghua Wu

    (Chinese Academy of Sciences)

  • Buxing Han

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Huairou National Comprehensive Science Center
    East China Normal University)

Abstract

Amorphous nano-metal catalysts often exhibit appealing catalytic properties, because the intrinsic linear scaling relationship can be broken. However, accurate control synthesis of amorphous nano-metal catalysts with desired size and morphology is a challenge. In this work, we discover that Cu(0) could be oxidized to amorphous CuxO species by supercritical CO2. The formation process of the amorphous CuxO is elucidated with the aid of machine learning. Based on this finding, a method to prepare Cu nanoparticles with an amorphous shell is proposed by supercritical CO2 treatment followed by electroreduction. The unique feature of this method is that the size of the particles with amorphous shell can be easily controlled because their size depends on that of the original crystal Cu nanoparticles. Moreover, the thickness of the amorphous shell can be easily controlled by CO2 pressure and/or treatment time. The obtained amorphous Cu shell exhibits high selectivity for C2+ products with the Faradaic efficiency of 84% and current density of 320 mA cm−2. Especially, the FE of C2+ oxygenates can reach up to 65.3 %, which is different obviously from the crystalline Cu catalysts.

Suggested Citation

  • Chunjun Chen & Xupeng Yan & Yahui Wu & Xiudong Zhang & Shoujie Liu & Fanyu Zhang & Xiaofu Sun & Qinggong Zhu & Lirong Zheng & Jing Zhang & Xueqing Xing & Zhonghua Wu & Buxing Han, 2023. "Oxidation of metallic Cu by supercritical CO2 and control synthesis of amorphous nano-metal catalysts for CO2 electroreduction," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36721-8
    DOI: 10.1038/s41467-023-36721-8
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    References listed on IDEAS

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    Cited by:

    1. Di Wang & Hyun Dong Jung & Shikai Liu & Jiayi Chen & Haozhou Yang & Qian He & Shibo Xi & Seoin Back & Lei Wang, 2024. "Revealing the structural evolution of CuAg composites during electrochemical carbon monoxide reduction," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    2. Laihao Luo & Xinyan Liu & Xinyu Zhao & Xinyan Zhang & Hong-Jie Peng & Ke Ye & Kun Jiang & Qiu Jiang & Jie Zeng & Tingting Zheng & Chuan Xia, 2024. "Pressure-induced generation of heterogeneous electrocatalytic metal hydride surfaces for sustainable hydrogen transfer," Nature Communications, Nature, vol. 15(1), pages 1-15, December.

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