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Single-atom catalysts reveal the dinuclear characteristic of active sites in NO selective reduction with NH3

Author

Listed:
  • Weiye Qu

    (Fudan University)

  • Xiaona Liu

    (Fudan University)

  • Junxiao Chen

    (Fudan University)

  • Yangyang Dong

    (Fudan University)

  • Xingfu Tang

    (Fudan University
    Nanjing University of Information Science & Technology)

  • Yaxin Chen

    (Fudan University)

Abstract

High-performance catalysts are extremely required for controlling NO emission via selective catalytic reduction (SCR), and to acquire a common structural feature of catalytic sites is one key prerequisite for developing such catalysts. We design a single-atom catalyst system and achieve a generic characteristic of highly active SCR catalytic sites. A single-atom Mo1/Fe2O3 catalyst is developed by anchoring single acidic Mo ions on (001) surfaces of reducible α-Fe2O3, and the individual Mo ion and one neighboring Fe ion are thus constructed as one dinuclear site. As the number of the dinuclear sites increases, SCR rates increase linearly but the apparent activation energy remains almost unchanged, evidencing the identity of the dinuclear active sites. We further design W1/Fe2O3 and Fe1/WO3 and find that tuning acid or/and redox properties of dinuclear sites can alter SCR rates. Therefore, this work provides a design strategy for developing improved SCR catalysts via optimizing acid-redox properties of dinuclear sites.

Suggested Citation

  • Weiye Qu & Xiaona Liu & Junxiao Chen & Yangyang Dong & Xingfu Tang & Yaxin Chen, 2020. "Single-atom catalysts reveal the dinuclear characteristic of active sites in NO selective reduction with NH3," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15261-5
    DOI: 10.1038/s41467-020-15261-5
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    Cited by:

    1. Daying Zheng & Kaijie Liu & Zeshu Zhang & Qi Fu & Mengyao Bian & Xinyu Han & Xin Shen & Xiaohui Chen & Haijiao Xie & Xiao Wang & Xiangguang Yang & Yibo Zhang & Shuyan Song, 2024. "Essential features of weak current for excellent enhancement of NOx reduction over monoatomic V-based catalyst," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Lieven E. Gevers & Linga R. Enakonda & Ameen Shahid & Samy Ould-Chikh & Cristina I. Q. Silva & Pasi P. Paalanen & Antonio Aguilar-Tapia & Jean-Louis Hazemann & Mohamed Nejib Hedhili & Fei Wen & Javier, 2022. "Unraveling the structure and role of Mn and Ce for NOx reduction in application-relevant catalysts," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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