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Precise control of Pt encapsulation in zeolite-based catalysts for a stable low-temperature CO oxidation reaction

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Abstract

Metal—zeolite catalysts are vital in chemical and fuel production for their great stability, stereo-selectivity, and atom economy. When metal species keep shrinking their sizes to the subnanometer region, their spatial distribution in the zeolite framework/channels could have a great impact on their catalytic performance. Here, we precisely control the Pt species loaded on a silicalite-1 zeolite and characterize their structural status to the catalytic performance for CO oxidation. We find that Pt species exits as few-atom clusters encapsulated in the channels and destructively embedded Pt nanoparticles in the framework, besides the conventional surface-supported Pt. By utilizing effective Pt sites and limiting their sizes in the zeolite, we can maximize the catalytic CO oxidation performance of 1 at.% Pt-loaded zeolite catalysts to achieve a T100 as low as 90 °C and a stable reaction above 216 h.

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Acknowledgements

The work is financially supported by the National Natural Science Foundation of China (22172110). We thank the Facility Center at the Institute of Molecular Plus at Tianjin University for the transmission electron microscopes.

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Author notes

  1. These authors contributed equally to the work.

Authors and Affiliations

  1. Institute of Molecular Plus, Tianjin University, Tianjin, 300072, China

    Yatian Liu, Lifeng Zhang, Zejian Dong & Langli Luo

  2. Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China

    Langli Luo

Authors
  1. Yatian Liu
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  2. Lifeng Zhang
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  3. Zejian Dong
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  4. Langli Luo
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Corresponding authors

Correspondence to Lifeng Zhang or Langli Luo.

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Conflict of interest The authors declare no conflict of interest.

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Supporting information The supporting information is available online at http://chem.scichina.com and http://link.springer.com/journal/11426. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors.

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Liu, Y., Zhang, L., Dong, Z. et al. Precise control of Pt encapsulation in zeolite-based catalysts for a stable low-temperature CO oxidation reaction. Sci. China Chem. 65, 2015–2022 (2022). https://doi.org/10.1007/s11426-022-1383-x

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  • DOI: https://doi.org/10.1007/s11426-022-1383-x

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