Structure of Ti in TiCl3 Doped NaAlH4

To elucidate the structure of Ti in Ti-doped sodium alanate used for hydrogen storage, XAFS studies were performed. In freshly prepared samples the majority of the Ti is present in interstitial positions in the NaAlH4. By increasing the desorption temperature, thus increasing the extent of hydrogen...

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Bibliographic Details
Main Authors: Balde, C P, Stil, H A, van der Eerden, A M J, de Jong, K P, Bitter, J H
Format: Conference Proceeding
Language:English
Subjects:
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
ALUMINIUM ALLOYS
ALUMINIUM HYDRIDES
DESORPTION
DOPED MATERIALS
FINE STRUCTURE
HYDROGEN
HYDROGEN STORAGE
INTERSTITIALS
MATERIALS SCIENCE
SODIUM COMPOUNDS
TITANIUM ALLOYS
X-RAY SPECTRA
X-RAY SPECTROSCOPY
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Summary:To elucidate the structure of Ti in Ti-doped sodium alanate used for hydrogen storage, XAFS studies were performed. In freshly prepared samples the majority of the Ti is present in interstitial positions in the NaAlH4. By increasing the desorption temperature, thus increasing the extent of hydrogen desorption, Ti migrates into the Al, finally forming a less active TiAl3 alloy.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2644608