Catalytically active gold clusters and nanoparticles for CO oxidation

A. N. Pestryakov, N. Bogdanchikova, A. Simakov, I. Tuzovskaya, F. Jentoft, M. Farias, A. Díaz

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Electronic states of gold nanoparticles in mordenite and their transformations under redox treatments have been studied by the methods of FTIR spectroscopy of adsorbed CO and diffuse reflectance UV-visible spectroscopy. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the existence of two types of active sites of gold in CO oxidation - gold clusters <2 nm (low-temperature activity) and gold nanoparticles (high temperature activity).

Original languageEnglish
Pages (from-to)3792-3795
Number of pages4
JournalSurface Science
Volume601
Issue number18
DOIs
Publication statusPublished - 15 Sep 2007

Keywords

  • FTIR
  • Gold catalysts
  • Nanoparticles
  • UV-visible spectroscopy
  • Zeolites

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

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