Reaction of vanadium and cobalt clusters with ethylene and acetylene

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Abstract

The reactions of vanadium and cobalt clusters, generated by laser vaporization, with ethylene and acetylene were studied by using a fast flow reactor. In the reaction of small Vn with C2H4, the dehydrogenated products VnC2, VnC2H2 increasing the cluster number, the intensities of those products decrease monotonically, while those of VnC2H4 increase. Similar results were observed in the reaction of Vn with C2H2. On the other hand, only non-dehydrogenated products were observed in the reaction of small Con with C2H4, but for larger clusters (n ⩾ 9) the dehydrogenated products ConC2 and ConC2H2 appeared. The contrast between the reaction of Vn and Con is related to the heats of adsorption and the structure of adsorbed products.

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