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Distribution of Pt single atom coordination environments on anatase TiO2 supports controls reactivity

Author

Listed:
  • Wenjie Zang

    (University of California)

  • Jaeha Lee

    (University of California)

  • Peter Tieu

    (University of California)

  • Xingxu Yan

    (University of California)

  • George W. Graham

    (University of California
    University of Michigan)

  • Ich C. Tran

    (University of California)

  • Peikui Wang

    (University of Sherbrooke)

  • Phillip Christopher

    (University of California)

  • Xiaoqing Pan

    (University of California
    University of California
    University of California)

Abstract

Single-atom catalysts (SACs) offer efficient metal utilization and distinct reactivity compared to supported metal nanoparticles. Structure-function relationships for SACs often assume that active sites have uniform coordination environments at particular binding sites on support surfaces. Here, we investigate the distribution of coordination environments of Pt SAs dispersed on shape-controlled anatase TiO2 supports specifically exposing (001) and (101) surfaces. Pt SAs on (101) are found on the surface, consistent with existing structural models, whereas those on (001) are beneath the surface after calcination. Pt SAs under (001) surfaces exhibit lower reactivity for CO oxidation than those on (101) surfaces due to their limited accessibility to gas phase species. Pt SAs deposited on commercial-TiO2 are found both at the surface and in the bulk, posing challenges to structure-function relationship development. This study highlights heterogeneity in SA coordination environments on oxide supports, emphasizing a previously overlooked consideration in the design of SACs.

Suggested Citation

  • Wenjie Zang & Jaeha Lee & Peter Tieu & Xingxu Yan & George W. Graham & Ich C. Tran & Peikui Wang & Phillip Christopher & Xiaoqing Pan, 2024. "Distribution of Pt single atom coordination environments on anatase TiO2 supports controls reactivity," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45367-z
    DOI: 10.1038/s41467-024-45367-z
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    References listed on IDEAS

    as
    1. Yung-Kang Peng & Yichen Hu & Hung-Lung Chou & Yingyi Fu & Ivo F. Teixeira & Li Zhang & Heyong He & Shik Chi Edman Tsang, 2017. "Mapping surface-modified titania nanoparticles with implications for activity and facet control," Nature Communications, Nature, vol. 8(1), pages 1-13, December.
    2. Hua Gui Yang & Cheng Hua Sun & Shi Zhang Qiao & Jin Zou & Gang Liu & Sean Campbell Smith & Hui Ming Cheng & Gao Qing Lu, 2008. "Anatase TiO2 single crystals with a large percentage of reactive facets," Nature, Nature, vol. 453(7195), pages 638-641, May.
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