利用高能反应球磨,制备出Mg-30%TiMn1.5纳米/非晶复合储氢材料.采用X射线衍射分析了球磨过程中的相演变.运用透射电镜技术观察了颗粒的微观结构.用体积法测量了不同球磨时间的Mg氢化量.实验表明,Mg颗粒基本完成氢化,生成的β-MgH2,γ-MgH2晶粒尺寸约为8-15 nm.TiMn1 5粒子弥散分布在Mg基体上,形成结构均匀的复合材料.球磨过程中,TiMn1.5非晶对Mg氢化反应的催化作用分为细化Mg颗粒与有效离解氢分子,为氢原子的扩散提供两个不同阶段的"快速通道".差热分析表明,Mg氢化物在500 K分解.TiMn1.5非晶可以作为提高Mg氢化反应活性和效率的催化剂.
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