DOI: 10.1063/1.471269. Size dependence of mobility on the surface of metal clusters: Ammonia on Ag10 and Ag16

Size dependence of mobility on the surface of metal clusters: Ammonia on Ag10 and Ag16

10.1063/1.471269

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Equilibrium constants for the reactions of NH3 with the silver clusters, Ag10 and Ag16, have been measured in the gas phase as a function of temperature using a cluster flow reactor. The binding enthalpies, ΔH300°=−9.8±1.0 and −15.9±1.0 kcal mol−1, and entropies, ΔS300°=−10.3±3.0 and −23.5±3.0 cal mol−1 K−1, have been obtained for the complexes Ag10NH3 and Ag16NH3, respectively. Statistical mechanics modeling indicates that NH3 is mobile on the surface of Ag10NH3. In contrast, it is locally bound on Ag16. The implication is that the binding mechanism involves only electrostatic interaction on Ag10 and that Ag16 provides a site favorable to a stronger classical chemical lone-pair bond. Thus ammonia may diffuse on Ag10 and be localized on Ag16.

Bibliography

Lian, L., Mitchell, S. A., Hackett, P. A., & Rayner, D. M. (1996). Size dependence of mobility on the surface of metal clusters: Ammonia on Ag10 and Ag16. The Journal of Chemical Physics, 104(13), 5338â5344.

Authors 4

Li Lian (first)
Steven A. Mitchell (additional)
Peter A. Hackett (additional)
David M. Rayner (additional)

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:34 a.m.)
Deposited	1 year, 7 months ago (Feb. 7, 2024, 5:57 a.m.)
Indexed	1 year, 1 month ago (Aug. 1, 2024, 8:12 p.m.)
Issued	29 years, 5 months ago (April 1, 1996)
Published	29 years, 5 months ago (April 1, 1996)
Published Print	29 years, 5 months ago (April 1, 1996)

Funders 0

None

BibTeX

@article{Lian_1996, title={Size dependence of mobility on the surface of metal clusters: Ammonia on Ag10 and Ag16}, volume={104}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.471269}, DOI={10.1063/1.471269}, number={13}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Lian, Li and Mitchell, Steven A. and Hackett, Peter A. and Rayner, David M.}, year={1996}, month=apr, pages={5338–5344} }

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