Monodisperse colloidal metal particle from nonaqueous solutions: catalytic behavior in hydrogenation of but-1-ene of platinum, palladium, and rhodium particles supported on pumice
Metal catalysts have been prepared by depositing monodisperse particles of platinum (2-3 nm), rhodium (2-3 nm), or palladium (5 nm) prepared in reversed micellar solutions on pumice. The particles are well dispersed on the support whereas particles deposited from aqueous or alcoholic solution give large aggregates. The catalytic properties of these different catalysts in the deuteration, isomerization, and hydrogen-deuterium exchange of but-1-ene have been compared. The activities calculated per metal surface atom are similar. However, platinum prepared from microemulsions show unusually high selectivity in the isomerization reaction, and for such particles dehydrogenated species are active in the exchange reaction. The specificity of rhodium and palladium catalysts is independent of the mode of preparation. The reaction mechanisms are discussed.
- Research Organization:
- Universite Louis Pasteur, Strasbourg, France
- OSTI ID:
- 5462391
- Journal Information:
- J. Catal.; (United States), Vol. 103:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BUTENES
HYDROGENATION
PALLADIUM
CATALYTIC EFFECTS
PLATINUM
RHODIUM
CATALYST SUPPORTS
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
COLLOIDS
COMPARATIVE EVALUATIONS
DEUTERIUM
DISPERSIONS
ISOMERIZATION
ISOTOPIC EXCHANGE
MICROEMULSIONS
PARTICLE SIZE
PUMICE
SPECIFICITY
ALKENES
CHEMICAL REACTIONS
ELEMENTS
EMULSIONS
HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPES
KINETICS
LIGHT NUCLEI
METALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PLATINUM METALS
REACTION KINETICS
SIZE
STABLE ISOTOPES
SYNTHESIS
TRANSITION ELEMENTS
020400* - Petroleum- Processing