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Unraveling surface structures of gallium promoted transition metal catalysts in CO2 hydrogenation

Author

Listed:
  • Si Woo Lee

    (Fritz Haber Institute of the Max Planck Society)

  • Mauricio Lopez Luna

    (Fritz Haber Institute of the Max Planck Society)

  • Nikolay Berdunov

    (Fritz Haber Institute of the Max Planck Society)

  • Weiming Wan

    (Fritz Haber Institute of the Max Planck Society)

  • Sebastian Kunze

    (Fritz Haber Institute of the Max Planck Society)

  • Shamil Shaikhutdinov

    (Fritz Haber Institute of the Max Planck Society)

  • Beatriz Roldan Cuenya

    (Fritz Haber Institute of the Max Planck Society)

Abstract

Gallium-containing alloys have recently been reported to hydrogenate CO2 to methanol at ambient pressures. However, a full understanding of the Ga-promoted catalysts is still missing due to the lack of information about the surface structures formed under reaction conditions. Here, we employed near ambient pressure scanning tunneling microscopy and x-ray photoelectron spectroscopy to monitor the evolution of well-defined Cu-Ga surfaces during CO2 hydrogenation. We show the formation of two-dimensional Ga(III) oxide islands embedded into the Cu surface in the reaction atmosphere. The islands are a few atomic layers in thickness and considerably differ from bulk Ga2O3 polymorphs. Such a complex structure, which could not be determined with conventional characterization methods on powder catalysts, should be used for elucidating the reaction mechanism on the Ga-promoted metal catalysts.

Suggested Citation

  • Si Woo Lee & Mauricio Lopez Luna & Nikolay Berdunov & Weiming Wan & Sebastian Kunze & Shamil Shaikhutdinov & Beatriz Roldan Cuenya, 2023. "Unraveling surface structures of gallium promoted transition metal catalysts in CO2 hydrogenation," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40361-3
    DOI: 10.1038/s41467-023-40361-3
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    References listed on IDEAS

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