Generation of acid sites by SiO sub 2 deposition on groups IVB metal oxides

Journal Article · Sun Mar 01 00:00:00 EST 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90233-8· OSTI ID:6977605

Niwa, Miki; Katada, Naonobu; Murakami, Yuichi ^[1]

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1. 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), Vol. 134:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
10 SYNTHETIC FUELS
BUTANOLS
DEHYDRATION
BUTENES
ISOMERIZATION
SILICON OXIDES
CATALYTIC EFFECTS
CHEMICAL VAPOR DEPOSITION
TITANIUM OXIDES
VAPOR DEPOSITED COATINGS
ZIRCONIUM OXIDES
ABSORPTION SPECTROSCOPY
BROENSTED ACIDS
CATALYST SUPPORTS
CATALYSTS
CONFIGURATION INTERACTION
CORRELATIONS
INFRARED RADIATION
MICROSTRUCTURE
PH VALUE
SURFACE PROPERTIES
ALCOHOLS
ALKENES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL REACTIONS
COATINGS
CRYSTAL STRUCTURE
DEPOSITION
ELECTROMAGNETIC RADIATION
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SILICON COMPOUNDS
SPECTROSCOPY
SURFACE COATING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
400201* - Chemical & Physicochemical Properties
020400 - Petroleum- Processing
100200 - Synthetic Fuels- Production- (1990-)