On the synthesis, characterization and hydrogen storage behavior of ZrFe2 catalyzed Li-Mg-N-H hydrogen storage material

摘要

The present study deals with the use of ZrFe2 for the formation of pure phase of hydrogen storage material Mg(NH2)(2)/LiH. Since ZrFe2 is harder than the starting material LiNH2 and MgH2, pulverization effect produced by ZrFe2 assists in the synthesis of pure phase. The formation of pure Mg(NH2)(2)/LiH has been examined by XRD and confirmed by FTIR. The catalytic effect of ZrFe2 has been found to improve significantly the de/rehydrogenation characteristic of Mg(NH2)(2)/LiH. The ZrFe2 catalyzed Mg(NH2)(2)/LiH shows good recyclability. The activation energy of ZrFe2 catalyzed Mg(NH2)(2)/LiH was found to be 74.80 kJ/mol which is better than several other reported studies using different catalysts. Based on experimental results, a viable mechanism for dehydrogenation of Mg(NH2)(2) in the presence of ZrFe2 has also been proposed. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.