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Deuterium-Hydrogen Exchange in Solid Mg(BH4)2

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Published in Journal of Physical Chemistry. C. 2010, vol. 114, no. 21, p. 10045-10047
Abstract Deuterium−hydrogen exchange in solid α-Mg(BH4)2 is demonstrated. Compared to the previously reported exchange reactions in the alkali borohydrides, the temperature at which isotope exchange starts to take place is significantly lower (132 °C vs 200 °C for LiBH4). The activation energy for the deuterium−hydrogen exchange reaction is estimated to be 51 ± 15 kJ/mol. Almost complete isotope exchange was observed by treating solid Mg(BH4)2 for 72 h at 172 °C with 42 bar of D2. Preliminary experiments indicate that under these conditions Ca(BH4)2 also undergoes isotope exchange.
Stable URL http://archive-ouverte.unige.ch/unige:14684
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Other version: http://pubs.acs.org/doi/pdf/10.1021/jp101484f
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Deposited on : 2011-03-18

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