Metal borohydride formation from aluminium boride and metal hydrides
© the Owner Societies 2016.Metal borides are often decomposition products from metal borohydrides and thus play a role in the reverse reaction where hydrogen is absorbed. In this work, aluminium boride, AlB2, has been investigated as a boron source for the formation of borohydrides under hydrogen pr...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
R S C Publications
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/50805 |
| _version_ | 1848758540087328768 |
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| author | Møller, K. Fogh, A. Paskevicius, Mark Skibsted, J. Jensen, T. |
| author_facet | Møller, K. Fogh, A. Paskevicius, Mark Skibsted, J. Jensen, T. |
| author_sort | Møller, K. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © the Owner Societies 2016.Metal borides are often decomposition products from metal borohydrides and thus play a role in the reverse reaction where hydrogen is absorbed. In this work, aluminium boride, AlB2, has been investigated as a boron source for the formation of borohydrides under hydrogen pressures of p(H2) = 100 or 600 bar at elevated temperatures (350 or 400 °C). The systems AlB2-MHx (M = Li, Na, Mg, Ca) have been investigated, producing LiBH4, NaBH4 and Ca(BH4)2, whereas the formation of Mg(BH4)2 was not observed at T = 400 °C and p(H2) = 600 bar. The formation of the metal borohydrides is confirmed by powder X-ray diffraction and infrared spectroscopy and the fraction of boron in AlB2 and M(BH4)x is determined quantitatively by 11B MAS NMR. Hydrogenation for 12 h at T = 350-400 °C and p(H2) = 600 bar leads to the formation of substantial amounts of LiBH4 (38.6 mol%), NaBH4 (83.0 mol%) and Ca(BH4)2 (43.6 mol%). |
| first_indexed | 2025-11-14T09:45:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-50805 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:45:36Z |
| publishDate | 2016 |
| publisher | R S C Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-508052017-09-13T15:34:51Z Metal borohydride formation from aluminium boride and metal hydrides Møller, K. Fogh, A. Paskevicius, Mark Skibsted, J. Jensen, T. © the Owner Societies 2016.Metal borides are often decomposition products from metal borohydrides and thus play a role in the reverse reaction where hydrogen is absorbed. In this work, aluminium boride, AlB2, has been investigated as a boron source for the formation of borohydrides under hydrogen pressures of p(H2) = 100 or 600 bar at elevated temperatures (350 or 400 °C). The systems AlB2-MHx (M = Li, Na, Mg, Ca) have been investigated, producing LiBH4, NaBH4 and Ca(BH4)2, whereas the formation of Mg(BH4)2 was not observed at T = 400 °C and p(H2) = 600 bar. The formation of the metal borohydrides is confirmed by powder X-ray diffraction and infrared spectroscopy and the fraction of boron in AlB2 and M(BH4)x is determined quantitatively by 11B MAS NMR. Hydrogenation for 12 h at T = 350-400 °C and p(H2) = 600 bar leads to the formation of substantial amounts of LiBH4 (38.6 mol%), NaBH4 (83.0 mol%) and Ca(BH4)2 (43.6 mol%). 2016 Journal Article http://hdl.handle.net/20.500.11937/50805 10.1039/c6cp05391b R S C Publications restricted |
| spellingShingle | Møller, K. Fogh, A. Paskevicius, Mark Skibsted, J. Jensen, T. Metal borohydride formation from aluminium boride and metal hydrides |
| title | Metal borohydride formation from aluminium boride and metal hydrides |
| title_full | Metal borohydride formation from aluminium boride and metal hydrides |
| title_fullStr | Metal borohydride formation from aluminium boride and metal hydrides |
| title_full_unstemmed | Metal borohydride formation from aluminium boride and metal hydrides |
| title_short | Metal borohydride formation from aluminium boride and metal hydrides |
| title_sort | metal borohydride formation from aluminium boride and metal hydrides |
| url | http://hdl.handle.net/20.500.11937/50805 |