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Issue 18, 2009
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The identification of a hitherto unknown intermediate phase CaB2Hx from decomposition of Ca(BH4)2

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Abstract

Ca(BH4)2 is a promising material for hydrogen storage due to its high gravimetric capacity and expected suitable thermodynamic properties. Experimental reports indicate a more complex reaction pathway than the previously proposed route, including formation of unknown intermediate phases. In this work, the reaction scheme of a mixture of γ- and β-Ca(BH4)2 was investigated using temperature programmed desorption and high-resolution synchrotron radiation powder X-ray diffraction. An unknown intermediate Ca–B–H-containing phase has been identified as a CaB2Hx compound where x most probably equals 2. A structure model is proposed.

Graphical abstract: The identification of a hitherto unknown intermediate phase CaB2Hx from decomposition of Ca(BH4)2

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Article information


Submitted
05 Nov 2008
Accepted
03 Feb 2009
First published
05 Mar 2009

J. Mater. Chem., 2009,19, 2754-2759
Article type
Paper

The identification of a hitherto unknown intermediate phase CaB2Hx from decomposition of Ca(BH4)2

M. D. Riktor, M. H. Sørby, K. Chłopek, M. Fichtner and B. C. Hauback, J. Mater. Chem., 2009, 19, 2754
DOI: 10.1039/B818127F

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