The possibility of using ammonia as a hydrogen carrier is examined for the reaction between magnesium ammine complex MgCl(2)(NH(3))(6) and lithium hydride LiH Sample was milled at low temperature of -40 degrees C to avoid decomposition of MgCl(2)(NH(3))(6) during the milling The effects of milling time, milling speed (revolutions per minute), and catalysts on hydrogen storage proper-ties were investigated by thermogravimetry, thermal desorption mass spectroscopy, and X-ray diffraction experiments Experimental results indicated that a milled composite of Mg(NH(3))(6)Cl(2) and catalyzed-LiH desorbed the similar to 100% H(2) gas even at 125 degrees C in a closed system The reverse reaction also proceeded by separately cooling MgCl(2) at lower temperature than 100 degrees C and heating LiNH(2) at 300 degrees C in the closed system (C) 2010 Professor T Nejat Veziroglu Published by Elsevier Ltd All rights reserved