中文摘要：

采用机械球磨法制备了Mg（AlH4）2,分别考察了单一TiB2催化、NaAlH4催化以及NaAlH4与TiB2协同催化对Mg（AlH4）2放氢温度的影响.TPD测试表明,单一TiB2催化、NaAlH4催化均能使Mg（AlH4）2的放氢温度降低10℃左右;而当20%的NaAlH4与5%的TiB2（摩尔百分比）协同催化时,Mg（AlH4）2的放氢温度由146C降低至94℃,降幅达到52℃.

英文摘要：

Mg（AlH4）2 was prepared by ball milling.The effect of TiB2 and NaAlH4 on the dehydriding temperature of Mg（AlH4）2 was studied.When the catalyst was only 20%（mol） NaAlH4 or 5%（mol） TiB2,the dehydriding temperature of Mg（AlH4）2 were reduced about 10℃.While with the existence of 20%（mol） NaAlH4 and 5%（mol） TiB2,the dehydriding temperature of Mg（AlH4）2 decreased from 146℃to 94℃.There is a synergistic function between NaAlH4 and TiB2 for the catalysis of the dehydrogenation reaction of Mg（AlH4）2.