DOI: 10.1063/1.464959. Induced infrared absorption of H2, HD, and D2 physisorbed on NaCl films

Induced infrared absorption of H2, HD, and D2 physisorbed on NaCl films

10.1063/1.464959

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Isotherms of H2, HD, and D2 on annealed NaCl films in the temperature range 28 K to 33 K are reported with an isosteric heat of adsorption of −3.4±0.8 kJ/mole. Infrared spectroscopy of H2, HD, and D2 induced by the strong electric fields at the NaCl film surface, reveals a number of features not reported before. Analysis of these spectroscopic features is consistent with molecule adsorption on defect sites and on smooth-face (100) surfaces of the film crystallites. The infrared bands of molecules adsorbed to smooth-face surfaces are red shifted by less than 1% from the gas phase fundamental vibrational frequencies for all hydrogen isotopes. A diffuse combination band is associated with the molecular tangential vibration along the surface. An analysis of both the thermodynamic and spectroscopic data with an extended Langmuir model of adsorption provides a consistent picture of the molecule physisorbed to the surface as a hindered rotor.

Bibliography

Dai, D. J., & Ewing, G. E. (1993). Induced infrared absorption of H2, HD, and D2 physisorbed on NaCl films. The Journal of Chemical Physics, 98(6), 5050â5058.

Authors 2

David J. Dai (first)
George E. Ewing (additional)

References 32 Referenced 41

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:34 a.m.)
Deposited	1 year, 6 months ago (Feb. 6, 2024, 9:50 p.m.)
Indexed	1 year, 6 months ago (Feb. 11, 2024, 8:02 a.m.)
Issued	32 years, 5 months ago (March 15, 1993)
Published	32 years, 5 months ago (March 15, 1993)
Published Print	32 years, 5 months ago (March 15, 1993)

Funders 0

None

BibTeX

@article{Dai_1993, title={Induced infrared absorption of H2, HD, and D2 physisorbed on NaCl films}, volume={98}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.464959}, DOI={10.1063/1.464959}, number={6}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Dai, David J. and Ewing, George E.}, year={1993}, month=mar, pages={5050–5058} }

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