Journal Title
Title of Journal: Sci China Ser BChem
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Abbravation: Science in China Series B: Chemistry
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Publisher
SP Science in China Press
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Authors: Chao Tian HuaBin Yang
Publish Date: 2009/09/24
Volume: 52, Issue: 9, Pages: 1412-1416
Abstract
An LiMgNH system has been synthesized from MgNH22 and LiH in the ratio 38 by a ballmilling process and its dehydrogenation/rehydrogenation properties at around 190°C were investigated XRD FTIR and TG results showed that the system was composed of an LiH phase and an amorphous MgNH22 phase with a purity of 90 A reversible hydrogen storage capacity of 47 was observed during the first cycle and more than 90 of the stored hydrogen was desorbed within 100 min for each cycle However only 42 and 29 respectively of hydrogen was observed during two subsequent dehydrogenation cycles In situ GC results showed that no NH3 could be observed during the dehydrogenation process On the basis of the SEM and XRD results the loss in hydrogen storage capacity can be mainly attributed to agglomeration oxidation and crystallization of the materials
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