Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy
Lithium aluminium hydride (LiAlH 4 ) has long been identified as a viable hydrogen storage material, due to its high attainable theoretical gravimetric hydrogen capacity of 7.9 wt%. The main impediment to its viability for technical application is its limitation for regeneration. Recently, solvent-m...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier B.V.
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/56378 |
| _version_ | 1848759860076740608 |
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| author | Humphries, Terry Birkmire, D. McGrady, G. Hauback, B. Jensen, C. |
| author_facet | Humphries, Terry Birkmire, D. McGrady, G. Hauback, B. Jensen, C. |
| author_sort | Humphries, Terry |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Lithium aluminium hydride (LiAlH 4 ) has long been identified as a viable hydrogen storage material, due to its high attainable theoretical gravimetric hydrogen capacity of 7.9 wt%. The main impediment to its viability for technical application is its limitation for regeneration. Recently, solvent-mediated regeneration has been achieved at room temperature using dimethyl-ether, Me 2 O, although the reaction pathway has not been determined. This in situ multinuclear NMR spectroscopy study ( 27 Al and 7 Li) has confirmed that the Me 2 O-mediated, direct synthesis of LiAlH 4 occurs by a one-step process in which LiAlH 4 ·xMe 2 O is formed, and does not involve Li 3 AlH 6 or any other intermediates. Hydrogenation has been shown to occur below ambient temperatures (at 0 °C) for the first time, and the importance of solvate adducts formed during the process is demonstrated. |
| first_indexed | 2025-11-14T10:06:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-56378 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:06:35Z |
| publishDate | 2017 |
| publisher | Elsevier B.V. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-563782019-07-01T06:21:06Z Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy Humphries, Terry Birkmire, D. McGrady, G. Hauback, B. Jensen, C. Lithium aluminium hydride (LiAlH 4 ) has long been identified as a viable hydrogen storage material, due to its high attainable theoretical gravimetric hydrogen capacity of 7.9 wt%. The main impediment to its viability for technical application is its limitation for regeneration. Recently, solvent-mediated regeneration has been achieved at room temperature using dimethyl-ether, Me 2 O, although the reaction pathway has not been determined. This in situ multinuclear NMR spectroscopy study ( 27 Al and 7 Li) has confirmed that the Me 2 O-mediated, direct synthesis of LiAlH 4 occurs by a one-step process in which LiAlH 4 ·xMe 2 O is formed, and does not involve Li 3 AlH 6 or any other intermediates. Hydrogenation has been shown to occur below ambient temperatures (at 0 °C) for the first time, and the importance of solvate adducts formed during the process is demonstrated. 2017 Journal Article http://hdl.handle.net/20.500.11937/56378 10.1016/j.jallcom.2017.06.300 Elsevier B.V. fulltext |
| spellingShingle | Humphries, Terry Birkmire, D. McGrady, G. Hauback, B. Jensen, C. Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy |
| title | Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy |
| title_full | Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy |
| title_fullStr | Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy |
| title_full_unstemmed | Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy |
| title_short | Regeneration of LiAlH4 at sub-ambient temperatures studied by multinuclear NMR spectroscopy |
| title_sort | regeneration of lialh4 at sub-ambient temperatures studied by multinuclear nmr spectroscopy |
| url | http://hdl.handle.net/20.500.11937/56378 |