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

研究成果: Article査読

5 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)4313-4322
ページ数10
ジャーナルLangmuir
32
17
DOI
出版ステータスPublished - 2016 5 3
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 表面および界面
  • 分光学
  • 電気化学

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