ARTICLE pubs.acs.org/JPCC
Improved Dehydrogenation Properties of Calcium Borohydride Combined with Alkaline-Earth Metal Amides Hailiang Chu, Guotao Wu, Yao Zhang,* Zhitao Xiong,* Jianping Guo, Teng He, and Ping Chen Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, PR China 116023
bS Supporting Information ABSTRACT: Promotion of dehydrogenation based on the interaction of [BH4] and [NH2] sources has been demonstrated to be one of the most effective approaches in developing an advanced borohydride/amide hydrogen storage combined system. The Ca(BH4)22Mg(NH2)2 and Ca(BH4)22Ca(NH2)2 composites are thereby synthesized in the present work. It is found that the binary combined systems exhibit an onset dehydrogenation temperature of ∼220 °C, which is ∼100 °C lower than that of pristine Ca(BH4)2. The hydrogen release measurements for Ca(BH4)22Mg(NH2)2 and Ca(BH4)22Ca(NH2)2 samples below 480 °C show desorption amounts of 8.3 and 6.8 wt % hydrogen, respectively. The dehydrogenation of both samples is accompanied by an ammonia emission of
