NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3
Aluminum hydride (alane; AlH3) has been identified as a leading hydrogen storage material by the US Department of Energy. With a high gravimetric hydrogen capacity of 10.1 wt.%, and a hydrogen density of 1.48 g/cm3, AlH3 decomposes cleanly to its elements above 60 °C with no side reactions. This stu...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/42808 |
| _version_ | 1848756521208381440 |
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| author | Humphries, Terry Munroe, K. Dewinter, T. Jensen, C. McGrady, G. |
| author_facet | Humphries, Terry Munroe, K. Dewinter, T. Jensen, C. McGrady, G. |
| author_sort | Humphries, Terry |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Aluminum hydride (alane; AlH3) has been identified as a leading hydrogen storage material by the US Department of Energy. With a high gravimetric hydrogen capacity of 10.1 wt.%, and a hydrogen density of 1.48 g/cm3, AlH3 decomposes cleanly to its elements above 60 °C with no side reactions. This study explores in detail the thermodynamic and spectroscopic properties of AlH3; in particular the α, α′ and γ polymorphs, of which α′-AlH3 is reported for the first time, free from traces of other polymorphs or side products. Thermal analysis of α-, α′-, and γ-AlH3 has been conducted, using DSC and TGA methods, and the results obtained compared with each other and with literature data. All three polymorphs were investigated by 1H MAS-NMR spectroscopy for the first time, and their 27Al MAS-NMR spectra were also measured and compared with literature values. AlH3·nEt2O has also been studied by 1H and 27Al MAS-NMR spectroscopy and DSC and TGA methods, and an accurate decomposition pathway has been established for this adduct. |
| first_indexed | 2025-11-14T09:13:31Z |
| format | Journal Article |
| id | curtin-20.500.11937-42808 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:13:31Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-428082017-09-13T14:30:05Z NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3 Humphries, Terry Munroe, K. Dewinter, T. Jensen, C. McGrady, G. Aluminum hydride (alane; AlH3) has been identified as a leading hydrogen storage material by the US Department of Energy. With a high gravimetric hydrogen capacity of 10.1 wt.%, and a hydrogen density of 1.48 g/cm3, AlH3 decomposes cleanly to its elements above 60 °C with no side reactions. This study explores in detail the thermodynamic and spectroscopic properties of AlH3; in particular the α, α′ and γ polymorphs, of which α′-AlH3 is reported for the first time, free from traces of other polymorphs or side products. Thermal analysis of α-, α′-, and γ-AlH3 has been conducted, using DSC and TGA methods, and the results obtained compared with each other and with literature data. All three polymorphs were investigated by 1H MAS-NMR spectroscopy for the first time, and their 27Al MAS-NMR spectra were also measured and compared with literature values. AlH3·nEt2O has also been studied by 1H and 27Al MAS-NMR spectroscopy and DSC and TGA methods, and an accurate decomposition pathway has been established for this adduct. 2013 Journal Article http://hdl.handle.net/20.500.11937/42808 10.1016/j.ijhydene.2013.01.096 restricted |
| spellingShingle | Humphries, Terry Munroe, K. Dewinter, T. Jensen, C. McGrady, G. NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3 |
| title | NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3 |
| title_full | NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3 |
| title_fullStr | NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3 |
| title_full_unstemmed | NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3 |
| title_short | NMR spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of AlH3 |
| title_sort | nmr spectroscopic and thermodynamic studies of the etherate and the a, a', and γ phases of alh3 |
| url | http://hdl.handle.net/20.500.11937/42808 |