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Unravelling the origin of reaction-driven aggregation and fragmentation of atomically dispersed Pt catalyst on ceria support.
Wang, Haodong; Choi, Hyuk; Shimogawa, Ryuichi; Li, Yuanyuan; Zhang, Lihua; Kim, Hyun You; Frenkel, Anatoly I.
Afiliación
  • Wang H; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA. anatoly.frenkel@stonybrook.edu.
  • Choi H; Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea.
  • Shimogawa R; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA. anatoly.frenkel@stonybrook.edu.
  • Li Y; Mitsubishi Chemical Corporation, Science and Innovation Center, Yokohama 227-8502, Japan.
  • Zhang L; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
  • Kim HY; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, USA.
  • Frenkel AI; Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea.
Nanoscale ; 16(31): 14716-14721, 2024 Aug 13.
Article en En | MEDLINE | ID: mdl-38829119
ABSTRACT
Metal-support interaction plays a crucial role in governing the stability and activity of atomically dispersed platinum catalysts on ceria support. The migration and aggregation of platinum atoms during the catalytic reaction leads to the redistribution of active sites. In this study, by utilizing a multimodal characterization scheme, we observed the aggregation of platinum atoms at high temperatures under reverse water gas shift reaction conditions and the subsequent fragmentation of platinum clusters, forming "single atoms" upon cooling. Theoretical simulations of both effects uncovered the roles of carbon monoxide binding on perimeter Pt sites in the clusters and hydrogen coverage in the aggregation and fragmentation mechanisms. This study highlights the complex effects of adsorbate and supports interactions with metal sites in Pt/ceria catalysts that govern their structural transformations under in situ conditions.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido