Effect of silica support on Ru-Cu cluster morphology as determined by catalytic activity
Several silica supports impregnated with 1% Ru and a 1:1 atomic ratio of Ru:Cu in the bimetallic catalysts have been characterized by H/sub 2/ chemisorption, temperature programmed desorption and re-reduction, and several catalytic reactions of varying structure sensitivity. Clusters of Ru-Cu on one of the silicas, Cab-O-Sil HS5, is distinguished by the fact that only on this support is hydrogen chemisorption suppressed by added Cu. It is postulated that the morphology of the Ru-Cu clusters on HS5 involves a Cu-rich mixture of Ru and Cu on a Ru core. Clusters of Ru-Cu on other silicas appear to be more heterogeneous and have an associated pure Cu phase. Hydrogen spillover occurs with the latter morphology and both hydrogen chemisorption and spillover are suppressed by the morphology of clusters on HS5.
- Research Organization:
- Yale Univ., New Haven, CT
- DOE Contract Number:
- AC02-81ER10829
- OSTI ID:
- 6803025
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 91:10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
08 HYDROGEN
COPPER
CATALYTIC EFFECTS
HYDROGEN
CHEMISORPTION
RUTHENIUM
SILICA
CATALYSIS
DESORPTION
EXPERIMENTAL DATA
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
INFORMATION
METALS
MINERALS
NONMETALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
080201 - Hydrogen- Chemisorption Storage