DRIFTS studies of the interaction of nitric oxide and carbon monoxide on Au-TiO2

M. A. Debeila, N. J. Coville, M. S. Scurrell, G. R. Hearne

Research output: Contribution to journalConference articlepeer-review

57 Citations (Scopus)

Abstract

DRIFTS data were collected on the interaction of NO and CO over Au/TiO2 prepared by a deposition-precipitation procedure. Reduction of Au/TiO2 in hydrogen at 300°C for 30min did not completely reduce the catalyst and both ionic and metallic gold sites were found to be present. Adsorption of NO is dominated by the formation of dinitrosyl complexes. CO readily adsorbs on Au/TiO2 leading to multi-bonded carbonyl species. These species readily react with gaseous O2 to form carbonate species. Displacement of adsorbed CO by gaseous NO showed no interaction between the two adsorbates and there is no experimental evidence for the formation of isocyanate species. This is rationalized in terms of the low tendency of NO to undergo dissociation on Au/TiO2.

Original languageEnglish
Pages (from-to)79-87
Number of pages9
JournalCatalysis Today
Volume72
Issue number1-2
DOIs
Publication statusPublished - 15 Feb 2002
Externally publishedYes
EventCatalytic Gold 2002 (Gold 2001 S.I.) - Cape Town, South Africa
Duration: 2 Apr 20012 Apr 2001

Keywords

  • Au(NO)
  • CO
  • DRIFTS
  • Gold
  • NO
  • Titania

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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