DOI: 10.1063/1.453903. Dependence of metal cluster reaction kinetics on charge state. I. Reaction of neutral (Nbx) and ionic (Nb+x, Nb−x) niobium clusters with D2

Dependence of metal cluster reaction kinetics on charge state. I. Reaction of neutral (Nbx) and ionic (Nb+x, Nb−x) niobium clusters with D2

10.1063/1.453903

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The effect of charge state on niobium cluster chemisorption kinetics is explored via measurement of the relative rates of D2 activation by Nb−x, Nbx, and Nb+x containing up to 28 atoms. The presence of the + or − charge is found to have only a minor effect on rate for the majority of the clusters, with the reactivity of the ions being generally within a factor of 2.5 of the corresponding neutrals. The excess charge does, however, have a profund influence on reaction rate for a number of clusters in the 7≤x≤16 size range, which may be indicative of the importance of cluster electronic structure in the chemisorption process. Kinetic data for Nb9, Nb12, and Nb+12 are found to deviate significantly from the expected pseudo-first-order behavior, suggesting the existence of structural isomers for these species. The anomalous behavior for Nb9 and Nb12 was not observed in previous neutral Nbx chemisorption studies. The maximum uptake of D2 by niobium clusters is found to be essentially independent of charge state, but varies strongly with x, consistent with the presence of a high barrier to D–D bond activation for certain of the clusters.

Bibliography

Zakin, M. R., Brickman, R. O., Cox, D. M., & Kaldor, A. (1988). Dependence of metal cluster reaction kinetics on charge state. I. Reaction of neutral (Nbx) and ionic (Nb+x, Nbâx) niobium clusters with D2. The Journal of Chemical Physics, 88(6), 3555â3560.

Authors 4

M. R. Zakin (first)
R. O. Brickman (additional)
D. M. Cox (additional)
A. Kaldor (additional)

References 27 Referenced 134

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 9:20 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 2:37 a.m.)
Indexed	1 year ago (Aug. 2, 2024, 9:14 a.m.)
Issued	37 years, 5 months ago (March 15, 1988)
Published	37 years, 5 months ago (March 15, 1988)
Published Print	37 years, 5 months ago (March 15, 1988)

Funders 0

None

BibTeX

@article{Zakin_1988, title={Dependence of metal cluster reaction kinetics on charge state. I. Reaction of neutral (Nbx) and ionic (Nb+x, Nb−x) niobium clusters with D2}, volume={88}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.453903}, DOI={10.1063/1.453903}, number={6}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Zakin, M. R. and Brickman, R. O. and Cox, D. M. and Kaldor, A.}, year={1988}, month=mar, pages={3555–3560} }

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