Synthesis and dehydrogenation of LiCa(NH2)3(BH3)2 |
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| Authors: | Bin Liu Yong Shen Chua Guotao Wu Zhitao Xiong Ping Chen |
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| Affiliation: | 1. Department of Chemical Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, PR China;2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China |
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| Abstract: | We report the synthesis of a new hydrogen storage material with a composition of LiCa(NH2)3(BH3)2. The theoretical hydrogen capacity of LiCa(NH2)3(BH3)2 is 9.85 wt.%. It can be prepared by ball milling the mixture of calcium amidoborane (Ca(NH2BH3)2) and lithium amide (LiNH2) in a molar ratio of 1:1. The experimental results show that this material starts to release hydrogen at a temperature as low as ca. 50 °C, which is ca. 70 °C lower than that of pure Ca(NH2BH3)2 possibly resulting from the active interaction of NH2− in LiNH2 with BH3 in Ca(NH2BH3)2. ca. 4.1 equiv. or 6.8 wt.% hydrogen can be released at 300 °C. The dehydrogenation is a mildly exothermic process forming stable nitride products. |
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| Keywords: | Calcium amidoborane Lithium amide LiCa(NH2)3(BH3)2 Dehydrogenation |
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