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Mapping the oxygen structure of γ-Al2O3 by high-field solid-state NMR spectroscopy

Author

Listed:
  • Qiang Wang

    (Chinese Academy of Sciences)

  • Wenzheng Li

    (Chinese Academy of Sciences)

  • Ivan Hung

    (National High Magnetic Field Laboratory)

  • Frederic Mentink-Vigier

    (National High Magnetic Field Laboratory)

  • Xiaoling Wang

    (National High Magnetic Field Laboratory)

  • Guodong Qi

    (Chinese Academy of Sciences)

  • Xiang Wang

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

  • Zhehong Gan

    (National High Magnetic Field Laboratory)

  • Jun Xu

    (Chinese Academy of Sciences
    Huazhong University of Science and Technology)

  • Feng Deng

    (Chinese Academy of Sciences)

Abstract

γ-Al2O3 is one of the most widely used catalysts or catalyst supports in numerous industrial catalytic processes. Understanding the structure of γ-Al2O3 is essential to tuning its physicochemical property, which still remains a great challenge. We report a strategy for the observation and determination of oxygen structure of γ-Al2O3 by using two-dimensional (2D) solid-state NMR spectroscopy at high field. 2D 17O double-quantum single-quantum homonuclear correlation NMR experiment is conducted at an ultra-high magnetic field of 35.2 T to reveal the spatial proximities between different oxygen species from the bulk to surface. Furthermore, 2D proton-detected 1H-17O heteronuclear correlation NMR experiments allow for a rapid identification and differentiation of surface hydroxyl groups and (sub-)surface oxygen species. Our experimental results demonstrate a non-random distribution of oxygen species in γ-Al2O3.

Suggested Citation

  • Qiang Wang & Wenzheng Li & Ivan Hung & Frederic Mentink-Vigier & Xiaoling Wang & Guodong Qi & Xiang Wang & Zhehong Gan & Jun Xu & Feng Deng, 2020. "Mapping the oxygen structure of γ-Al2O3 by high-field solid-state NMR spectroscopy," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17470-4
    DOI: 10.1038/s41467-020-17470-4
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    Cited by:

    1. Natalie M. Stuart & Karl Sohlberg, 2021. "The Microstructure of γ-Alumina," Energies, MDPI, vol. 14(20), pages 1-16, October.

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