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    Metal borohydride formation from aluminium boride and metal hydrides

    Access Status
    Fulltext not available
    Authors
    Møller, K.
    Fogh, A.
    Paskevicius, Mark
    Skibsted, J.
    Jensen, T.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Møller, K. and Fogh, A. and Paskevicius, M. and Skibsted, J. and Jensen, T. 2016. Metal borohydride formation from aluminium boride and metal hydrides. Physical Chemistry Chemical Physics. 18 (39): pp. 27545-27553.
    Source Title
    Physical Chemistry Chemical Physics
    DOI
    10.1039/c6cp05391b
    ISSN
    1463-9076
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/50805
    Collection
    • Curtin Research Publications
    Abstract

    © 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%).

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