In:
The Journal of Chemical Physics, AIP Publishing, Vol. 109, No. 20 ( 1998-11-22), p. 8935-8939
Abstract:
Niobium cluster cations, Nbx+, are produced from a laser vaporization/supersonic expansion cluster ion source, and their reactivities are studied using a fast-flow reactor. The reaction patterns of n-butane and isobutane are found to be quite similar. In general, the relative reactivity of the cluster cations shows a decreasing trend with increasing cluster size (x=1–9). Dehydrogenation products from the butane molecules are observed within the small cluster size range (x=1–6). The degree of dehydrogenation increases with cluster size (x=1–6); but right after x=7, no dehydrogenation is observed and only molecular adsorption takes place. The product distribution for isobutane is found to be more scattered to channels of different extent of dehydrogenation than that for n-butane. The results are explained on the basis of the prompt insertion and the lowering of the activation barrier by the charge-induced polarization.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
1998
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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