Hydrogen Adsorption in the Ti-Doped Mesoporous Silicate SBA-15

While metal-doped mesoporous silicate SBA-15 has been studied extensively for its catalytic properties, the adsorption of molecular hydrogen in this system has not been considered. We report herein that the titanium-doped material (10% Ti) adsorbs nearly twice the amount of hydrogen at 77 K and a pr...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2009-09, Vol.113 (35), p.15634-15638
Main Authors: Acatrinei, A. I, Hartl, M. A, Eckert, Juergen, Falcao, Eduardo H. L, Chertkov, G, Daemen, L. L
Format: Article
Language:English
Subjects:
C: Surfaces, Interfaces, Catalysis
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Summary:While metal-doped mesoporous silicate SBA-15 has been studied extensively for its catalytic properties, the adsorption of molecular hydrogen in this system has not been considered. We report herein that the titanium-doped material (10% Ti) adsorbs nearly twice the amount of hydrogen at 77 K and a pressure of 25 bar than pure SBA-15, Hydrogen adsorption isotherms also show that binding energies in the Ti-doped material are more than 50% greater than in SBA-15. Neutron vibrational spectroscopy shows clear evidence for interaction of hydrogen with Ti, which is responsible for part of the increase in hydrogen sorption in the material.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp8110875