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dc.contributor.authorJensen, S.
dc.contributor.authorPaskevicius, Mark
dc.contributor.authorHansen, B.
dc.contributor.authorJakobsen, A.
dc.contributor.authorMøller, K.
dc.contributor.authorWhite, J.
dc.contributor.authorAllendorf, M.
dc.contributor.authorStavila, V.
dc.contributor.authorSkibsted, J.
dc.contributor.authorJensen, T.
dc.identifier.citationJensen, S. and Paskevicius, M. and Hansen, B. and Jakobsen, A. and Møller, K. and White, J. and Allendorf, M. et al. 2018. Hydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites. Physical Chemistry Chemical Physics. 20 (23): pp. 16266-16275.

© 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.

dc.publisherR S C Publications
dc.titleHydrogenation properties of lithium and sodium hydride – closo-borate, [B10H10]2− and [B12H12]2−, composites
dc.typeJournal Article
dcterms.source.titlePhysical Chemistry Chemical Physics
curtin.departmentSchool of Electrical Engineering, Computing and Mathematical Science (EECMS)
curtin.accessStatusOpen access

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