TY - JOUR
T1 - Experimental evidence of Ca[B12H12] formation during decomposition of a Ca(BH4)2 + MgH2 based reactive hydride composite
AU - Bonatto Minella, Christian
AU - Garroni, Sebastiano
AU - Olid, David
AU - Teixidor, Francesc
AU - Pistidda, Claudio
AU - Lindemann, Inge
AU - Gutfleisch, Oliver
AU - Baró, Maria Dolores
AU - Bormann, Rüdiger
AU - Klassen, Thomas
AU - Dornheim, Martin
PY - 2011/9/15
Y1 - 2011/9/15
N2 - The combination of Ca(BH4)2 and MgH2 materials results in a composite with remarkable hydrogen storage properties. However, full reversibility upon the (re)hydrogenation reaction has not yet been achieved. The poor reversibility is shown to be linked to the formation of stable intermediate phases or side products upon decomposition. In this work, we show, for the first time, the clear experimental evidence of CaB 12H12 among the decomposition products of a Ca(BH 4)2 + MgH2 composite. A combination of 11B Magic Angle Spinning-Nuclear Magnetic Resonance ( 11B{1H} MAS NMR), ex situ X-ray diffraction (XRD) and Rietveld analysis are presented. An assessment of the (de)hydrogenation and (re)hydrogenation reactions of Ca(BH4)2 + MgH2 composite is reported. The experimental results provided in this work highlight the reasons for the limited reversibility observed in the Ca(BH 4)2 + MgH2 composite upon (re)hydrogenation. © 2011 American Chemical Society.
AB - The combination of Ca(BH4)2 and MgH2 materials results in a composite with remarkable hydrogen storage properties. However, full reversibility upon the (re)hydrogenation reaction has not yet been achieved. The poor reversibility is shown to be linked to the formation of stable intermediate phases or side products upon decomposition. In this work, we show, for the first time, the clear experimental evidence of CaB 12H12 among the decomposition products of a Ca(BH 4)2 + MgH2 composite. A combination of 11B Magic Angle Spinning-Nuclear Magnetic Resonance ( 11B{1H} MAS NMR), ex situ X-ray diffraction (XRD) and Rietveld analysis are presented. An assessment of the (de)hydrogenation and (re)hydrogenation reactions of Ca(BH4)2 + MgH2 composite is reported. The experimental results provided in this work highlight the reasons for the limited reversibility observed in the Ca(BH 4)2 + MgH2 composite upon (re)hydrogenation. © 2011 American Chemical Society.
U2 - https://doi.org/10.1021/jp204598a
DO - https://doi.org/10.1021/jp204598a
M3 - Article
VL - 115
SP - 18010
EP - 18014
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
ER -