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Issue 4, 2011
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Reversible dehydrogenation of magnesium borohydride to magnesium triborane in the solid state under moderate conditions

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Abstract

Thermal decomposition of magnesium borohydride, Mg(BH4)2, in the solid state was studied by a combination of PCT, TGA/MS and NMR spectroscopy. Dehydrogenation of Mg(BH4)2 at 200 °C en vacuo results in the highly selective formation of magnesium triborane, Mg(B3H8)2. This process is reversible at 250 °C under 120 atm H2. Dehydrogenation at higher temperature, >300 °C under a constant argon flow of 1 atm, produces a complex mixture of polyborane species. A borohydride condensation mechanism involving metal hydride formation is proposed.

Graphical abstract: Reversible dehydrogenation of magnesium borohydride to magnesium triborane in the solid state under moderate conditions

  • This article is part of the themed collection: Hydrogen
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Publication details

The article was received on 25 Aug 2010, accepted on 28 Oct 2010 and first published on 24 Nov 2010


Article type: Communication
DOI: 10.1039/C0CC03461D
Citation: Chem. Commun., 2011,47, 1330-1332
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    Reversible dehydrogenation of magnesium borohydride to magnesium triborane in the solid state under moderate conditions

    M. Chong, A. Karkamkar, T. Autrey, S. Orimo, S. Jalisatgi and C. M. Jensen, Chem. Commun., 2011, 47, 1330
    DOI: 10.1039/C0CC03461D

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