DOI: 10.1063/1.444249. Adsorption studies of H2 isotopes on ZnO: Coverage-induced IR frequency shifts and adsorbate geometry

Adsorption studies of H2 isotopes on ZnO: Coverage-induced IR frequency shifts and adsorbate geometry

10.1063/1.444249

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The coverage dependence of the IR stretching frequencies for dissociative type I adsorption of H2 and D2 on ZnO powders has been measured using transmission IR spectroscopy. By comparing the frequency shifts observed when the isotopic composition of the adsorbate is varied at constant total coverage with the shifts observed when the total coverage of either pure component is varied, we can separate the dynamic and static contributions to the coverage-induced frequency shifts. The ZnH and ZnD shifts are due primarily to electrodynamic interactions. The observed shifts are in good agreement with the Hammaker model for dynamic dipole–dipole interactions, if adsorption is assumed to occur on (2×2) reconstructed ZnO(0001) surface planes. In contrast, the OH and OD shifts are due to electrostatic and inductive interactions. The electrostatic contribution can be estimated using a modification of Buckingham’s treatment of local environment effects. A qualitative model based on electron localization effects is presented to explain the observed inductive contribution.

Bibliography

Griffin, G. L., & Yates, J. T. (1982). Adsorption studies of H2 isotopes on ZnO: Coverage-induced IR frequency shifts and adsorbate geometry. The Journal of Chemical Physics, 77(7), 3744â3750.

Authors 2

Gregory L. Griffin (first)
John T. Yates (additional)

References 30 Referenced 54

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Dates

Type	When
Created	22 years, 5 months ago (Feb. 28, 2003, 11:32 a.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 7:14 p.m.)
Indexed	5 months ago (March 22, 2025, 4:39 a.m.)
Issued	42 years, 10 months ago (Oct. 1, 1982)
Published	42 years, 10 months ago (Oct. 1, 1982)
Published Print	42 years, 10 months ago (Oct. 1, 1982)

Funders 0

None

BibTeX

@article{Griffin_1982, title={Adsorption studies of H2 isotopes on ZnO: Coverage-induced IR frequency shifts and adsorbate geometry}, volume={77}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.444249}, DOI={10.1063/1.444249}, number={7}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Griffin, Gregory L. and Yates, John T.}, year={1982}, month=oct, pages={3744–3750} }

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