Na_3AlH_6的直接制备及储氢特性研究

Direct Synthesis and Hydrogen Storage Characterization of Na_3AlH_6

以NaH和Al粉为原料,金属Ti为催化剂,在氢气压力为1 MPa的条件下,通过行星球磨法合成了接近纯相的Na_3AlH_5储氢材料.对合成的Na_3A1H_6材料采用XRD进行结构表征并进行结构精修,结果表明,以Ti为催化剂可以合成较纯的Na_3AlH_6材料.利用PCT和TPD对合成的Na_3A1H_6材料进行了放氢动力学性能测试.

Na3AlH6 materials were directly synthesized through a mechanochemical synthesis route.Na3AlH6 materials were prepared by planetary ball milling under 1 MPa hydrogen with NaH and Al as starting materials,and Ti powder as dopant.The crystal structures of Na3AlH6 materials were analyzed by XRD,and were refined by rietveld method.The results showed that the product was nearly pure Na3AlH6.The dehydrogenation kinetics of Na3AlH6 were also investigated by PCT and TPD methods.