Imaging nanostructural modifications induced by electronic metal-support interaction effects at Au||cerium-based oxide nanointerfaces

Miguel López-Haro, José M. Cíes, Susana Trasobares, José A. Pérez-Omil, Juan J. Delgado, Serafín Bernal, Pascale Bayle-Guillemaud, Odile Stéphan, Kenta Yoshida, Edward D. Boyes, Pratibha L. Gai, José J. Calvino

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A variety of advanced (scanning) transmission electron microscopy experiments, carried out in aberration-corrected equipment, provide direct evidence about subtle structural changes taking place at nanometer-sized Au||ceria oxide interfaces, which agrees with the occurrence of charge transfer effects between the reduced support and supported gold nanoparticles suggested by macroscopic techniques. Tighter binding of the gold nanoparticles onto the ceria oxide support when this is reduced is revealed by the structural analysis. This structural modification is accompanied by parallel deactivation of the CO chemisorption capacity of the gold nanoparticles, which is interpreted in exact quantitative terms as due to deactivation of the gold atoms at the perimeter of the Au||cerium oxide interface.

Original languageEnglish
Pages (from-to)6812-6820
Number of pages9
JournalACS Nano
Volume6
Issue number8
DOIs
Publication statusPublished - 2012 Aug 28
Externally publishedYes

Keywords

  • STEM
  • ceria
  • electronic metal-support interaction effects
  • gold catalysts
  • nanointerfaces

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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  • Cite this

    López-Haro, M., Cíes, J. M., Trasobares, S., Pérez-Omil, J. A., Delgado, J. J., Bernal, S., Bayle-Guillemaud, P., Stéphan, O., Yoshida, K., Boyes, E. D., Gai, P. L., & Calvino, J. J. (2012). Imaging nanostructural modifications induced by electronic metal-support interaction effects at Au||cerium-based oxide nanointerfaces. ACS Nano, 6(8), 6812-6820. https://doi.org/10.1021/nn301557u