CO and O2 adsorption on model Au-TiO2 systems

Au/TiO2 catalysts are active for CO oxidation at room temperature and lower. To probe the surfaces of these catalysts, CO and O2 adsorption and coadsorption on model Au-TiO2 systems were examined under UHV conditions using TPD, ASE and XPS. No chemisorption of molecular O2 was detected, as previousl...

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Bibliographic Details
Published in:Catalysis letters 1997, Vol.43 (1-2), p.51-54
Main Authors: LIU, Z. M, VANNICE, M. A
Format: Article
Language:English
Subjects:
Adsorption
Catalysis
Catalysts
Catalysts: preparations and properties
Chemisorption
Chemistry
Crystal surfaces
Crystals
Exact sciences and technology
General and physical chemistry
Organic chemistry
Oxidation
Single crystals
Surface chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Titanium dioxide
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Summary:Au/TiO2 catalysts are active for CO oxidation at room temperature and lower. To probe the surfaces of these catalysts, CO and O2 adsorption and coadsorption on model Au-TiO2 systems were examined under UHV conditions using TPD, ASE and XPS. No chemisorption of molecular O2 was detected, as previously reported for clean Au single-crystal surfaces. A low concentration of CO adsorption sites associated with Au was observed; however, no unique interfacial sites could be unambiguously identified on these surfaces.
ISSN:1011-372X
1572-879X
DOI:10.1023/a:1018918017777