Generation of acid sites by SiO sub 2 deposition on groups IVB metal oxides
- Nagoya Univ. (Japan)
An ultra thin silica layer was prepared by chemical vapor deposition of Si(OCH{sub 3}){sub 4} onto titania and zirconia. The relationship between surface structure and acidity was studied by measurement of coverage, IR spectroscopy of probe molecules, and test reactions. Silica was deposited to form a 1:1 complex with the oxide cation (-M-O-Si-), until more than 90% of monolayer coverage was obtained. The silica overlayer showed weak Broensted acidity only sufficient to catalyze the isomerization of 1-butene and the dehydration of tert-butyl alcohol. The acidity could not be correlated with the difference in coordination number or valence of cations but seemed to correlate with the interaction between silica and metal oxide.
- OSTI ID:
- 6977605
- Journal Information:
- Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 134:1; ISSN 0021-9517; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Acidic properties of silics-containing mixed oxide-aerogels preparation and characterization of zirconia-silica and comparison to titania-silica
Proton affinity distributions of TiO{sub 2}-SiO{sub 2} and ZrO{sub 2}-SiO{sub 2} mixed oxides and their relationship to catalyst activities for 1-butene isomerization
Related Subjects
020400 -- Petroleum-- Processing
10 SYNTHETIC FUELS
100200 -- Synthetic Fuels-- Production-- (1990-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ALCOHOLS
ALKENES
BROENSTED ACIDS
BUTANOLS
BUTENES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL REACTIONS
CHEMICAL VAPOR DEPOSITION
COATINGS
CONFIGURATION INTERACTION
CORRELATIONS
CRYSTAL STRUCTURE
DEHYDRATION
DEPOSITION
ELECTROMAGNETIC RADIATION
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFRARED RADIATION
INORGANIC ACIDS
ISOMERIZATION
MICROSTRUCTURE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
RADIATIONS
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
SURFACE COATING
SURFACE PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VAPOR DEPOSITED COATINGS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES