%0 journal article %@ 0925-8388 %A Torre, F., Valentoni, A., Milanese, C., Pistidda, C., Marini, A., Dornheim, M., Enzo, S., Mulas, G., Garroni, S. %D 2015 %J Journal of Alloys and Compounds %N 1 %P S 284-S 287 %R doi:10.1016/j.jallcom.2014.12.228 %T Kinetic improvement on the CaH2-catalyzed Mg(NH2)2 + 2LiH system %U https://doi.org/10.1016/j.jallcom.2014.12.228 1 %X In the present work we focused on the catalytic effect of CaH2 on the dehydrogenation process of the Mg(NH2)2–2LiH system. The synthesis, hydrogen storage properties and energy barriers were investigated by X-ray diffraction (XRD), temperature-programmed desorption (TPD) and differential scanning calorimetry (DSC). The TPD measurements proved that desorption of the Mg(NH2)2–2LiH system milled with 0.08 mol of CaH2 started at temperature of 78 °C, lower if compared with the 125 °C observed in the pristine material. Furthermore, Kissinger analysis revealed that CaH2 acted as a catalyst to decrease the activation energy of the first dehydrogenation step from a value of 133.8 ± 4.1 kJ/mol for the pristine material to 105.1 ± 3.2 kJ/mol when CaH2 was dispersed into the mixture.