Reversibility and Improved Hydrogen Release of Magnesium Borohydride
By R. Newhouse, V. Stavila, Son-Jong Hwang, L. Klebanoff, J. Zhang. 2010
147 citations recorded by the source corpus.
Desorption and subsequent rehydrogenation of Mg(BH4)2 with and without 5 mol % TiF3 and ScCl3 have been investigated. Temperature programmed desorption (TPD) experiments revealed a significant increase in the rate of desorption as well as the weight percentage of hydrogen released with additives upon heating to 300 °C. Stable Mg(BxHy)n intermediates were formed at 300 °C, whereas MgB2 was the major product when heated to 600 °C. These samples were then rehydrogenated and subsequently characterized with powder X-ray diffraction (pXRD), Raman, and NMR spectroscopy. We confirmed significant conversion of MgB2 to fully hydrogenated Mg(BH4)2 for the sample with and without additives. TPD and NMR studies revealed that the additives have a significant effect on the reaction pathway during both dehydrogenation and rehydrogenation reactions. This work suggests that the use of additives may provide a valid pathway for improving intrinsic hydrogen storage properties of magnesium borohydride.
Subfields: Catalysis, Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/25f347579fb922d2ac9895bafeff881621fa01ee
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In Catalysis
In Condensed Matter Physics
In Materials Chemistry
Citations in the corpus
- Recent Progress in Metal Borohydrides for Hydrogen Storage (2011, background): “This was proven in a recent study: partial formation of Mg(BH4)2 was confirmed in rehydrogenation experiments carried out at 663 K in a hydrogen pressure of 90 MPa for 3 days [72].”