Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites
© 2018 the Owner Societies. The hydrogen absorption properties of metal closo-borate/metal hydride composites, M2B10H10-8MH and M2B12H12-10MH, M = Li or Na, are studied under high hydrogen pressures to understand the formation mechanism of metal borohydrides. The hydrogen storage properties of the c...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
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R S C Publications
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/68936 |
| _version_ | 1848761926451986432 |
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| author | Jensen, S. Paskevicius, Mark Hansen, B. Jakobsen, A. Møller, K. White, J. Allendorf, M. Stavila, V. Skibsted, J. Jensen, T. |
| author_facet | Jensen, S. Paskevicius, Mark Hansen, B. Jakobsen, A. Møller, K. White, J. Allendorf, M. Stavila, V. Skibsted, J. Jensen, T. |
| author_sort | Jensen, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2018 the Owner Societies. The hydrogen absorption properties of metal closo-borate/metal hydride composites, M2B10H10-8MH and M2B12H12-10MH, M = Li or Na, are studied under high hydrogen pressures to understand the formation mechanism of metal borohydrides. The hydrogen storage properties of the composites have been investigated by in situ synchrotron radiation powder X-ray diffraction at p(H2) = 400 bar and by ex situ hydrogen absorption measurements at p(H2) = 526 to 998 bar. The in situ experiments reveal the formation of crystalline intermediates before metal borohydrides (MBH4) are formed. On the contrary, the M2B12H12-10MH (M = Li and Na) systems show no formation of the metal borohydride at T = 400 °C and p(H2) = 537 to 970 bar.11B MAS NMR of the M2B10H10-8MH composites reveal that the molar ratio of LiBH4or NaBH4and the remaining B species is 1:0.63 and 1:0.21, respectively. Solution and solid-state11B NMR spectra reveal new intermediates with a B:H ratio close to 1:1. Our results indicate that the M2B10H10(M = Li, Na) salts display a higher reactivity towards hydrogen in the presence of metal hydrides compared to the corresponding [B12H12]2-composites, which represents an important step towards understanding the factors that determine the stability and reversibility of high hydrogen capacity metal borohydrides for hydrogen storage. |
| first_indexed | 2025-11-14T10:39:26Z |
| format | Journal Article |
| id | curtin-20.500.11937-68936 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:39:26Z |
| publishDate | 2018 |
| publisher | R S C Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-689362018-10-01T08:57:18Z Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites Jensen, S. Paskevicius, Mark Hansen, B. Jakobsen, A. Møller, K. White, J. Allendorf, M. Stavila, V. Skibsted, J. Jensen, T. © 2018 the Owner Societies. The hydrogen absorption properties of metal closo-borate/metal hydride composites, M2B10H10-8MH and M2B12H12-10MH, M = Li or Na, are studied under high hydrogen pressures to understand the formation mechanism of metal borohydrides. The hydrogen storage properties of the composites have been investigated by in situ synchrotron radiation powder X-ray diffraction at p(H2) = 400 bar and by ex situ hydrogen absorption measurements at p(H2) = 526 to 998 bar. The in situ experiments reveal the formation of crystalline intermediates before metal borohydrides (MBH4) are formed. On the contrary, the M2B12H12-10MH (M = Li and Na) systems show no formation of the metal borohydride at T = 400 °C and p(H2) = 537 to 970 bar.11B MAS NMR of the M2B10H10-8MH composites reveal that the molar ratio of LiBH4or NaBH4and the remaining B species is 1:0.63 and 1:0.21, respectively. Solution and solid-state11B NMR spectra reveal new intermediates with a B:H ratio close to 1:1. Our results indicate that the M2B10H10(M = Li, Na) salts display a higher reactivity towards hydrogen in the presence of metal hydrides compared to the corresponding [B12H12]2-composites, which represents an important step towards understanding the factors that determine the stability and reversibility of high hydrogen capacity metal borohydrides for hydrogen storage. 2018 Journal Article http://hdl.handle.net/20.500.11937/68936 10.1039/c7cp07776a http://creativecommons.org/licenses/by-nc/3.0/ R S C Publications fulltext |
| spellingShingle | Jensen, S. Paskevicius, Mark Hansen, B. Jakobsen, A. Møller, K. White, J. Allendorf, M. Stavila, V. Skibsted, J. Jensen, T. Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites |
| title | Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites |
| title_full | Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites |
| title_fullStr | Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites |
| title_full_unstemmed | Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites |
| title_short | Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites |
| title_sort | hydrogenation properties of lithium and sodium hydride – closo-borate, [b10h10]2− and [b12h12]2−, composites |
| url | http://hdl.handle.net/20.500.11937/68936 |