Activity for the oxidation of methanol of a molybdena monolayer supported on tin oxide
- Nagoya Univ. (Japan)
A molybdenum oxide monolayer was prepared on SnO{sub 2}, and the relationship between its structure and its activity for methanol oxidation was studied. Surface molybdate is stabilized due to the interaction with the SnO{sub 2} surface, thus forming a monolayer consisting of MoO{sub 6} in < 6nm{sup {minus}2} of the Mo surface concentration and < ca. 75% of the coverage. So far as the supported molybdenum oxide forms a monolayer, the turnover frequency of methanol oxidation increases linearly with the Mo surface concentration; this is evidence for two neighboring Mo sites as an active site for the reaction. On further loading, however, MoO{sub 3} forms a large isolated crystal in the macropore without formation of a multiple overlayer, and strong acid sites are created. Large crystals and acid sites thus formed are, however, not available for the reaction, since the turnover frequency is constant. Conclusions here drawn may be applicable to catalysts prepared by mixing oxides.
- OSTI ID:
- 7105545
- 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
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Related Subjects
100200* -- Synthetic Fuels-- Production-- (1990-)
ALCOHOLS
ALDEHYDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CONFIGURATION INTERACTION
CORRELATIONS
CRYSTAL STRUCTURE
FORMALDEHYDE
HYDROXY COMPOUNDS
KINETICS
METHANOL
MICROSTRUCTURE
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
STABILIZATION
SYNTHESIS
TIN COMPOUNDS
TIN OXIDES
TRANSITION ELEMENT COMPOUNDS