中文摘要：

采用氢化NaH/Al＋xTiC（x=0,5%,8%,10%,摩尔分数）混合物的方法制备TiC掺NaAlH4配位氢化物,系统研究TiC催化剂含量对样品吸放氢行为的影响。结果表明：TiC能有效改善铝氢化钠的吸放氢动力学性能,样品的加氢速率随着TiC含量的增加而提高;TiC掺NaAlH4复合物具有良好的吸放氢循环稳定性,掺杂10%TiC（摩尔分数）的NaAlH4复合物经过8次吸放氢循环后,其吸、放氢容量仍可稳定保持为4.5%和3.8%（质量分数）;TiC掺NaAlH4复合物的颗粒尺寸可降低到50-100nm,这对改善体系吸放氢反应动力学起到主要作用。

英文摘要：

TiC-doped NaA1H4 complex hydrides were prepared by hydrogenation of ball-milled Nail/A1 mixture with x TiC powder （x = 0, 5%, 8%, 10%, mole fraction）. The effects of TiC catalyst content on the absorption/desorption behaviors of the samples were investigated. The results show that TiC can improve the hydriding/dehydriding kinetics of sodium aluminum hydride, the hydriding rate of the sample increases with increasing TiC content. It is found that the TiC-doped NaA1H4 composites have a relatively good cyclic stability. The composite doped with 10% TiC maintains steadily about 4.5% （mass fraction） hydrogen absorption capacity as against about 3.8% （mass fraction） hydrogen desorption capacity over 8 cycles. The particle sizes of the TiC-doped NaA1H4 composites can be reduced to 50-100 nm, which may play an important role in improving the hydriding/dehydriding kinetics.