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Memory-dictated dynamics of single-atom Pt on CeO2 for CO oxidation

Author

Listed:
  • Zihao Zhang

    (Pacific Northwest National Laboratory
    Washington State University)

  • Jinshu Tian

    (Pacific Northwest National Laboratory)

  • Yubing Lu

    (Pacific Northwest National Laboratory)

  • Shize Yang

    (Arizona State University)

  • Dong Jiang

    (Washington State University)

  • Weixin Huang

    (Washington State University)

  • Yixiao Li

    (Washington State University)

  • Jiyun Hong

    (SLAC National Accelerator Laboratory)

  • Adam S. Hoffman

    (SLAC National Accelerator Laboratory)

  • Simon R. Bare

    (SLAC National Accelerator Laboratory)

  • Mark H. Engelhard

    (Pacific Northwest National Laboratory)

  • Abhaya K. Datye

    (University of New Mexico)

  • Yong Wang

    (Pacific Northwest National Laboratory
    Washington State University)

Abstract

Single atoms of platinum group metals on CeO2 represent a potential approach to lower precious metal requirements for automobile exhaust treatment catalysts. Here we show the dynamic evolution of two types of single-atom Pt (Pt1) on CeO2, i.e., adsorbed Pt1 in Pt/CeO2 and square planar Pt1 in PtATCeO2, fabricated at 500 °C and by atom-trapping method at 800 °C, respectively. Adsorbed Pt1 in Pt/CeO2 is mobile with the in situ formation of few-atom Pt clusters during CO oxidation, contributing to high reactivity with near-zero reaction order in CO. In contrast, square planar Pt1 in PtATCeO2 is strongly anchored to the support during CO oxidation leading to relatively low reactivity with a positive reaction order in CO. Reduction of both Pt/CeO2 and PtATCeO2 in CO transforms Pt1 to Pt nanoparticles. However, both catalysts retain the memory of their initial Pt1 state after reoxidative treatments, which illustrates the importance of the initial single-atom structure in practical applications.

Suggested Citation

  • Zihao Zhang & Jinshu Tian & Yubing Lu & Shize Yang & Dong Jiang & Weixin Huang & Yixiao Li & Jiyun Hong & Adam S. Hoffman & Simon R. Bare & Mark H. Engelhard & Abhaya K. Datye & Yong Wang, 2023. "Memory-dictated dynamics of single-atom Pt on CeO2 for CO oxidation," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37776-3
    DOI: 10.1038/s41467-023-37776-3
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    References listed on IDEAS

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    1. Yang-Gang Wang & Donghai Mei & Vassiliki-Alexandra Glezakou & Jun Li & Roger Rousseau, 2015. "Dynamic formation of single-atom catalytic active sites on ceria-supported gold nanoparticles," Nature Communications, Nature, vol. 6(1), pages 1-8, May.
    2. Sharon Mitchell & Javier Pérez-Ramírez, 2020. "Single atom catalysis: a decade of stunning progress and the promise for a bright future," Nature Communications, Nature, vol. 11(1), pages 1-3, December.
    3. Hui Wang & Jin-Xun Liu & Lawrence F. Allard & Sungsik Lee & Jilei Liu & Hang Li & Jianqiang Wang & Jun Wang & Se H. Oh & Wei Li & Maria Flytzani-Stephanopoulos & Meiqing Shen & Bryan R. Goldsmith & Mi, 2019. "Surpassing the single-atom catalytic activity limit through paired Pt-O-Pt ensemble built from isolated Pt1 atoms," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
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    1. Yunan Li & Lingling Guo & Meng Du & Chen Tian & Gui Zhao & Zhengwu Liu & Zhenye Liang & Kunming Hou & Junxiang Chen & Xi Liu & Luozhen Jiang & Bing Nan & Lina Li, 2024. "Unraveling distinct effects between CuOx and PtCu alloy sites in Pt−Cu bimetallic catalysts for CO oxidation at different temperatures," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Seung-Hee Ryu & Seungeun Kim & Hyunjoo Lee & Joon-Hwan Choi & Hojin Jeong, 2024. "Robust palladium oxide nano-cluster catalysts using atomic ions and strong interactions for high-performance methane oxidation," Nature Communications, Nature, vol. 15(1), pages 1-15, December.

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