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Identification of CO2 adsorption sites on MgO nanosheets by solid-state nuclear magnetic resonance spectroscopy

Author

Listed:
  • Jia-Huan Du

    (Nanjing University)

  • Lu Chen

    (East China University of Science and Technology)

  • Bing Zhang

    (Lam Research Corporation, Fremont)

  • Kuizhi Chen

    (National High Magnetic Field Laboratory)

  • Meng Wang

    (Peking University)

  • Yang Wang

    (Nanjing University)

  • Ivan Hung

    (National High Magnetic Field Laboratory)

  • Zhehong Gan

    (National High Magnetic Field Laboratory)

  • Xin-Ping Wu

    (East China University of Science and Technology)

  • Xue-Qing Gong

    (East China University of Science and Technology)

  • Luming Peng

    (Nanjing University)

Abstract

The detailed information on the surface structure and binding sites of oxide nanomaterials is crucial to understand the adsorption and catalytic processes and thus the key to develop better materials for related applications. However, experimental methods to reveal this information remain scarce. Here we show that 17O solid-state nuclear magnetic resonance (NMR) spectroscopy can be used to identify specific surface sites active for CO2 adsorption on MgO nanosheets. Two 3-coordinated bare surface oxygen sites, resonating at 39 and 42 ppm, are observed, but only the latter is involved in CO2 adsorption. Double resonance NMR and density functional theory (DFT) calculations results prove that the difference between the two species is the close proximity to H, and CO2 does not bind to the oxygen ions with a shorter O···H distance of approx. 3.0 Å. Extensions of this approach to explore adsorption processes on other oxide materials can be readily envisaged.

Suggested Citation

  • Jia-Huan Du & Lu Chen & Bing Zhang & Kuizhi Chen & Meng Wang & Yang Wang & Ivan Hung & Zhehong Gan & Xin-Ping Wu & Xue-Qing Gong & Luming Peng, 2022. "Identification of CO2 adsorption sites on MgO nanosheets by solid-state nuclear magnetic resonance spectroscopy," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28405-6
    DOI: 10.1038/s41467-022-28405-6
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    References listed on IDEAS

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