Abstract
Reactions of size-selected platinum cluster ions, Ptn+ (n = 1−5), with small hydrocarbon molecules (CH4, C2H6, C2H4, and C2H2) were studied in a beam-gas cell geometry at collision energies less than 1 eV employing a tandem mass spectrometer. It was found that dehydrogenation of the hydrocarbon molecules proceeds exclusively on Ptn+ and the absolute cross sections of the reactions depend critically on the cluster size, n, and the collision energy. The size- and the collision energy-dependent cross sections are successfully explained in an RRK framework.
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