title: Strain Field in Ultrasmall Gold Nanoparticles Supported on Cerium-Based Mixed Oxides. Key Influence of the Support Redox State.
abstract: Using a method that combines experimental and simulated Aberration-Corrected High Resolution Electron Microscopy images with digital image processing and structure modeling, strain distribution maps within gold nanoparticles relevant to real powder type catalysts, i.e., smaller than 3 nm, and supported on a ceria-based mixed oxide have been determined. The influence of the reduction state of the support and particle size has been examined. In this respect, it has been proven that reduction even at low temperatures induces a much larger compressive strain on the first {111} planes at the interface. This increase in compression fully explains, in accordance with previous DFT calculations, the loss of CO adsorption capacity of the interface area previously reported for Au supported on ceria-based oxides.
authors.affiliation: Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad Ciencias. Universidad de Cádiz . Campus Rio San Pedro, Puerto Real, 11510 Cádiz, Spain.|Université Grenoble Alpes , F-38000 Grenoble, France CEA-INAC/UJF-Grenoble 1 UMR-E, SP2M, LEMMA, Minatec Grenoble, F-38054, France.
authors.forename: Miguel
authors.initials: M
authors.lastname: López-Haro
authors.affiliation: Departments of Chemistry and Physics, University of York , The York JEOL Nanocentre, Heslington, York YO10 5DD, United Kingdom.
authors.forename: Kenta
authors.initials: K
authors.lastname: Yoshida
authors.affiliation: Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad Ciencias. Universidad de Cádiz . Campus Rio San Pedro, Puerto Real, 11510 Cádiz, Spain.
authors.forename: Eloy
authors.initials: E
authors.lastname: Del Río
authors.affiliation: Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad Ciencias. Universidad de Cádiz . Campus Rio San Pedro, Puerto Real, 11510 Cádiz, Spain.
authors.forename: José A
authors.initials: JA
authors.lastname: Pérez-Omil
authors.affiliation: Departments of Chemistry and Physics, University of York , The York JEOL Nanocentre, Heslington, York YO10 5DD, United Kingdom.
authors.forename: Edward D
authors.initials: ED
authors.lastname: Boyes
authors.affiliation: Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad Ciencias. Universidad de Cádiz . Campus Rio San Pedro, Puerto Real, 11510 Cádiz, Spain.
authors.forename: Susana
authors.initials: S
authors.lastname: Trasobares
authors.affiliation: Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign , 1304 West Green Street, Urbana, Illinois 61801, United States.
authors.forename: Jian-Min
authors.initials: JM
authors.lastname: Zuo
authors.affiliation: Departments of Chemistry and Physics, University of York , The York JEOL Nanocentre, Heslington, York YO10 5DD, United Kingdom.
authors.forename: Pratibha L
authors.initials: PL
authors.lastname: Gai
authors.affiliation: Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad Ciencias. Universidad de Cádiz . Campus Rio San Pedro, Puerto Real, 11510 Cádiz, Spain.
authors.forename: José J
authors.initials: JJ
authors.lastname: Calvino