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Activation of subnanometric Pt on Cu-modified CeO2 via redox-coupled atomic layer deposition for CO oxidation

Author

Listed:
  • Xiao Liu

    (Huazhong University of Science and Technology
    Huazhong University of Science and Technology)

  • Shuangfeng Jia

    (Wuhan University)

  • Ming Yang

    (Chemical Sciences and Materials Systems Lab
    Clemson University)

  • Yuanting Tang

    (Huazhong University of Science and Technology)

  • Yanwei Wen

    (Huazhong University of Science and Technology)

  • Shengqi Chu

    (Chinese Academy of Sciences)

  • Jianbo Wang

    (Wuhan University)

  • Bin Shan

    (Huazhong University of Science and Technology)

  • Rong Chen

    (Huazhong University of Science and Technology)

Abstract

Improving the low-temperature activity (below 100 °C) and noble-metal efficiency of automotive exhaust catalysts has been a continuous effort to eliminate cold-start emissions, yet great challenges remain. Here we report a strategy to activate the low-temperature performance of Pt catalysts on Cu-modified CeO2 supports based on redox-coupled atomic layer deposition. The interfacial reducibility and structure of composite catalysts have been precisely tuned by oxide doping and accurate control of Pt size. Cu-modified CeO2-supported Pt sub-nanoclusters demonstrate a remarkable performance with an onset of CO oxidation reactivity below room temperature, which is one order of magnitude more active than atomically-dispersed Pt catalysts. The Cu-O-Ce site with activated lattice oxygen anchors deposited Pt sub-nanoclusters, leading to a moderate CO adsorption strength at the interface that facilitates the low-temperature CO oxidation performance.

Suggested Citation

  • Xiao Liu & Shuangfeng Jia & Ming Yang & Yuanting Tang & Yanwei Wen & Shengqi Chu & Jianbo Wang & Bin Shan & Rong Chen, 2020. "Activation of subnanometric Pt on Cu-modified CeO2 via redox-coupled atomic layer deposition for CO oxidation," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18076-6
    DOI: 10.1038/s41467-020-18076-6
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    Cited by:

    1. Hao-Xin Liu & Shan-Qing Li & Wei-Wei Wang & Wen-Zhu Yu & Wu-Jun Zhang & Chao Ma & Chun-Jiang Jia, 2022. "Partially sintered copper‒ceria as excellent catalyst for the high-temperature reverse water gas shift reaction," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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