Effect of silica support on Ru-Cu cluster morphology as determined by catalytic activity

Journal Article · Thu May 07 04:00:00 EDT 1987 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100294a040· OSTI ID:6803025

Hong, A J; Rouco, A J; Resasco, D E; Haller, G L

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), Journal Name: J. Phys. Chem.; (United States) Vol. 91:10; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080201 -- Hydrogen-- Chemisorption Storage
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COPPER
DATA
DESORPTION
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
METALS
MINERALS
NONMETALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
RUTHENIUM
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
TRANSITION ELEMENTS