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Solid State NMR Studies of the Aluminum Hydride PhasesSeveral solid state NMR techniques including magic-angle-spinning (MAS) and multiple-quantum (MQ) MAS experiments have been used to characterize various AlH3 samples. MAS-NMR spectra for the 1H and 27Al nuclei have been obtained on a variety of AlH3 samples that include the (beta)- and (gamma)- phases as well as the most stable (alpha)-phase. While the dominant components in these NMR spectra correspond to the aluminum hydride phases, other species were found that include Al metal, molecular hydrogen (H2), as well as peaks that can be assigned to Al-O species in different configurations. The occurrence and concentration of these extraneous components are dependent upon the initial AlH3 phase composition and preparation procedures. Both the (beta)-AlH3 and (gamma)-AlH3 phases were found to generate substantial amounts of Al metal when the materials were stored at room temperature while the (alpha)-phase materials do not exhibit these changes.
Document ID
20060051440
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Hwang, Son-Jong
(California Inst. of Tech. Pasadena, CA, United States)
Bowman, R. C., Jr.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Graetz, Jason
(Brookhaven National Lab. Upton, NY, United States)
Reilly, J. J.
(Brookhaven National Lab. Upton, NY, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Nuclear Physics
Meeting Information
Meeting: 2006 Spring MRS Symposium EE Proceedings
Location: San Francisco, CA
Country: United States
Start Date: April 18, 2006
End Date: April 21, 2006
Funding Number(s)
CONTRACT_GRANT: NSF DMR-00-80065
CONTRACT_GRANT: NSF 97-24240
CONTRACT_GRANT: DEA-AC0298CH100886
CONTRACT_GRANT: DE-AI-01-05EE11105
Distribution Limits
Public
Copyright
Other
Keywords
phase compositions
nuclear magnetic resonance
metal hydrides

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