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Memory-dictated dynamics of single-atom Pt on CeO2 for CO oxidation.
Zhang, Zihao; Tian, Jinshu; Lu, Yubing; Yang, Shize; Jiang, Dong; Huang, Weixin; Li, Yixiao; Hong, Jiyun; Hoffman, Adam S; Bare, Simon R; Engelhard, Mark H; Datye, Abhaya K; Wang, Yong.
Afiliação
  • Zhang Z; Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA.
  • Tian J; The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA.
  • Lu Y; Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA.
  • Yang S; Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA.
  • Jiang D; Eyring Materials Center, Arizona State University, Tempe, AZ, 85257, USA.
  • Huang W; The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA.
  • Li Y; The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA.
  • Hong J; The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA.
  • Hoffman AS; Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
  • Bare SR; Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
  • Engelhard MH; Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
  • Datye AK; Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA.
  • Wang Y; Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM, 87131, USA.
Nat Commun ; 14(1): 2664, 2023 May 09.
Article em En | MEDLINE | ID: mdl-37160890
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.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Nat Commun Assunto da revista: BIOLOGIA / CIENCIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
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PubMed Links
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Nat Commun Assunto da revista: BIOLOGIA / CIENCIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos