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Dihydrogen in zeolite CaX: an inelastic neutron scattering study

Ramirez-Cuesta, A.J., Mitchell, P.C.H., Ross, D.K., Georgiev, P.A., Anderson, P.A., Langmi, H.W. and Book, D. (2007) Dihydrogen in zeolite CaX: an inelastic neutron scattering study. Journal of Alloys and Compounds, 446-447. pp. 393-396. ISSN 0925-8388

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To link to this item DOI: 10.1016/j.jallcom.2006.12.030

Abstract/Summary

We report an inelastic neutron scattering (INS) study of the rotational–vibrational spectrum of dihydrogen sorbed by zeolite CaX. In the low energy (<200 cm−1) INS spectrum of adsorbed H2 we observe the rotational–vibrational spectrum of H2, where the vibration is that of the H2 molecule against the binding site (i.e. H2–X, not H–H). We have observed for the first time the vibrational overtones of the hydrogen molecule against the adsorption surface up to sixth order. These vibrations are usually forbidden in INS spectroscopy because of the selection rules imposed by the spin flip event required. In our case we are able to observe such a vibration because the rotational transition J(1 ← 0) convolutes the vibrational spectrum. This paper reports the effect for the first time.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11572
Uncontrolled Keywords:Hydrogen storage materials, Inelastic neutron scattering spectrocopy, Zeolites
Additional Information:Proceedings of the International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications (MH2006)

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