Catalytic activity of gold nanoparticles incorporated into modified zeolites

E. Smolentseva, N. Bogdanchikova, A. Simakov, A. Pestryakov, M. Avalos, M. H. Farias, A. Tompos, V. Gurin

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38 Citations (Scopus)

Abstract

Gold catalysts modified by Fe and Ni and supported on different zeolite matrixes have been studied by TEM, TPR, and catalytic testing. The presence of a metal oxide additive allows stabilizing small gold particles, particularly in the case of Fe. The shape of light-off curves shows two temperature regions of the catalyst activity, a low-temperature range below 250°and a high-temperature range above 300°This situation is explained considering the existence of at least two types of catalytically active sites of gold assigned to gold clusters and gold nanoparticles, respectively, while the ionic state of gold (Au 3+) remains inactive. It is shown that interaction of gold with Fe promoter leads to activation of catalysts at low temperature due to a change of electronic state and redox properties of gold. NiO additive cause a similar, but less pronounced effect.

Original languageEnglish
Pages (from-to)1882-1886
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume7
Issue number6
DOIs
Publication statusPublished - Jun 2007

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Keywords

  • CO Oxidation
  • Gold
  • Zeolite

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Materials Science (miscellaneous)
  • Engineering (miscellaneous)

Cite this

Smolentseva, E., Bogdanchikova, N., Simakov, A., Pestryakov, A., Avalos, M., Farias, M. H., Tompos, A., & Gurin, V. (2007). Catalytic activity of gold nanoparticles incorporated into modified zeolites. Journal of Nanoscience and Nanotechnology, 7(6), 1882-1886. https://doi.org/10.1166/jnn.2007.735