Strain Field in Ultrasmall Gold Nanoparticles Supported on Cerium-Based Mixed Oxides. Key Influence of the Support Redox State

Miguel López-Haro, Kenta Yoshida, Eloy Del Río, José A. Pérez-Omil, Edward D. Boyes, Susana Trasobares, Jian-Min Zuo, Pratibha L. Gai, José J. Calvino

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)4313-4322
Number of pages10
JournalLangmuir
Volume32
Issue number17
DOIs
StatePublished - May 3 2016

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    López-Haro, M., Yoshida, K., Del Río, E., Pérez-Omil, J. A., Boyes, E. D., Trasobares, S., Zuo, J-M., Gai, P. L., & Calvino, J. J. (2016). Strain Field in Ultrasmall Gold Nanoparticles Supported on Cerium-Based Mixed Oxides. Key Influence of the Support Redox State. Langmuir, 32(17), 4313-4322. https://doi.org/10.1021/acs.langmuir.6b00758