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Resolving the puzzle of single-atom silver dispersion on nanosized γ-Al2O3 surface for high catalytic performance

Author

Listed:
  • Fei Wang

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

  • Jinzhu Ma

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

  • Shaohui Xin

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

  • Qiang Wang

    (Chinese Academy of Sciences)

  • Jun Xu

    (Chinese Academy of Sciences)

  • Changbin Zhang

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

  • Hong He

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

  • Xiao Cheng Zeng

    (University of Nebraska-Lincoln)

Abstract

Ag/γ-Al2O3 is widely used for catalyzing various reactions, and its performance depends on the valence state, morphology and dispersion of Ag species. However, detailed anchoring mechanism of Ag species on γ-Al2O3 remains largely unknown. Herein, we reveal that the terminal hydroxyls on γ-Al2O3 are responsible for anchoring Ag species. The abundant terminal hydroxyls existed on nanosized γ-Al2O3 can lead to single-atom silver dispersion, thereby resulting in markedly enhanced performance than the Ag cluster on microsized γ-Al2O3. Density-functional-theory calculations confirm that Ag atom is mainly anchored by the terminal hydroxyls on (100) surface, forming a staple-like local structure with each Ag atom bonded with two or three terminal hydroxyls. Our finding resolves the puzzle on why the single-atom silver dispersion can be spontaneously achieved only on nanosized γ-Al2O3, but not on microsized γ-Al2O3. The obtained insight into the Ag species dispersion will benefit future design of more efficient supported Ag catalysts.

Suggested Citation

  • Fei Wang & Jinzhu Ma & Shaohui Xin & Qiang Wang & Jun Xu & Changbin Zhang & Hong He & Xiao Cheng Zeng, 2020. "Resolving the puzzle of single-atom silver dispersion on nanosized γ-Al2O3 surface for high catalytic performance," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-13937-1
    DOI: 10.1038/s41467-019-13937-1
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    Cited by:

    1. Wei Tan & Shaohua Xie & Duy Le & Weijian Diao & Meiyu Wang & Ke-Bin Low & Dave Austin & Sampyo Hong & Fei Gao & Lin Dong & Lu Ma & Steven N. Ehrlich & Talat S. Rahman & Fudong Liu, 2022. "Fine-tuned local coordination environment of Pt single atoms on ceria controls catalytic reactivity," Nature Communications, Nature, vol. 13(1), pages 1-16, December.
    2. Jiaxin Li & Kai Li & Zhao Li & Chunxue Wang & Yifei Liang & Yatong Pang & Jinzhu Ma & Fei Wang & Ping Ning & Hong He, 2024. "Capture of single Ag atoms through high-temperature-induced crystal plane reconstruction," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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