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Issue 33, 2007
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Synthesis and properties of magnesium tetrahydroborate, Mg(BH4)2

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Abstract

Mg(BH4)2 is one of the few complex hydrides which have the potential to meet the requirements for hydrogen storage materials, because it contains 14.9 mass% H and has suitable thermodynamic properties. It has not been investigated for hydrogen storage applications yet. In this study, several ways to synthesize solvated and desolvated magnesium tetrahydroborate by wet chemical and mechanochemical methods were tested and compared. A direct synthesis by a reaction of MgH2 with aminoboranes yields magnesium tetrahydroborate quantitatively and in pure form. The method is also applicable to the synthesis of other tetrahydroborates. The products were characterized by elemental analysis, in situ X-ray diffraction (XRD), infrared spectroscopy (FTIR), and thermal analysis methods, such as thermogravimetric analysis (TGA-DSC) and high-pressure calorimetry under a hydrogen atmosphere (HP-DSC).

Graphical abstract: Synthesis and properties of magnesium tetrahydroborate, Mg(BH4)2

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Article information


Submitted
21 Feb 2007
Accepted
17 May 2007
First published
30 May 2007

J. Mater. Chem., 2007,17, 3496-3503
Article type
Paper

Synthesis and properties of magnesium tetrahydroborate, Mg(BH4)2

K. Chłopek, C. Frommen, A. Léon, O. Zabara and M. Fichtner, J. Mater. Chem., 2007, 17, 3496
DOI: 10.1039/B702723K

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