Abstract
The bimetallic Ru-M (M=Co,Fe,Ni,Mo, Rh,Cr, Mn) catalysts were prepared from SiO 2 -supported bimetallic carbonyl clusters, and it was found that the Ru-Co, Ru-Fe and Ru-Mo bimetallic carbonyl cluster-derived catalysts showed higher activity and selectivity for oxygenates such as C 1 -C 5 alcohols in CO hydrogenation,in contrast to catalysts prepared from SiO 2 -supported homometallic Ru and Co carbonyl clusters. In situ FT-IR studies revealed that the bands at 1584 and 1555 cm -1 species were intermediates to produce methanol and higher oxygenates,and at higher temperatures the 1584 cm -1 species could react with alkyl to form 1555 cm -1 species. By the surface chemical reaction and the IR study of isotopic molecules,it was suggested that 1584 and 1555 cm -1 were assigned to surface formyl and acetyl species.
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