ISSN:
1572-879X
Keywords:
SiO2-supported bimetallic Rh-Co cluster
;
RhCo3(CO)12
;
ethylene hydroformylation
;
propylene hydroformylation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The atmospheric hydroformylations of ethylene and propylene were investigated over SiO2-supported Rh4(CO)12, Co2(CO)8, Rh2Co2(CO)12 and RhCo3(CO)12-derived catalysts. The bimetal cluster-derived catalysts showed excellent activities for the formation of oxygenates. In situ IR study on partially dehydroxylated SiO2-supported RhCo3(CO)12 suggested that the bimetal cluster framework may be preserved after decarbonylation under H2 at 623 K and may be recarbonylated at room temperature. A strong physisorption of RhCo3 (CO)12 on SiO2 is proposed, due to a nucleophilic attack of surface oxygen on the Co atoms, which promotes a metal-support interaction and thus stabilizes the bimetal cluster framework. A subcarbonyl bimetal cluster is thought to be the actual catalytic species on the surface.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00812134
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