摘要
Mg-x(Ti0.9 Zr0.2 Mn1.5 Cr0.3)(x=20%,30%,40%) (mass fraction) composite powders were prepared by reactive ball milling with hydrogen and their hydrogen storage properties and microstructure were investigated by XRD,SEM and pressure-composition-temperature measurement.The results show that the composites have 3.83%-5.07%hydrogen capacity at 553 K and good hydrogenation kinetics,even at room temperature.Among them,the milled Mg-30%(Ti0.9Zr0.2Mn1.5Cr0.3)composite has the highest hydrogenation kinetics as it can quickly absorb 2.1%hydrogen at 373 K,3.5%in 2 000 s at 473 K,even 3.26%in 60 s at 553 K under 3 MPa hydrogen pressure.The improved hydrogenation properties come from the catalytic effect of Ti0.9 Zr0.2 Mn1.5 Cr0.3 particles dispersed uniformly on the surface of Mg particles.
Mg-x（Ti0.9 Zr0.2 Mn1.5 Cr0.3）（x=20%, 30%, 40%） （mass fraction）composite powders were prepared by reactive ball milling with hydrogen and their hydrogen storage properties and microstructure were investigated by XRD, SEM and pressurecomposition-temperature measurement. The results show that the composites have 3.83%-5.07% hydrogen capacity at 553 K and good hydrogenation kinetics, even at room temperature. Among them, the milled Mg-30%（Ti0.9Zr0.2Mn1.5Cr0.3）composite has the highest hydrogenation kinetics as it can quickly absorb 2.1% hydrogen at 373 K, 3.5% in 2 000 s at 473 K, even 3.26% in 60 s at 553 K under 3 MPa hydrogen pressure. The improved hydrogenation properties come from the catalytic effect of Ti0.9 Zr0.2 Mn1.5 Cr0.3 particles dispersed uniformly on the surface of Mg particles.
基金
Projects(20833009,20873148,U0734005) supported by the National Natural Science Foundation of China
Project(2010CB631303) supported by the National Basic Research Program of China
Project(2009A11GX052) supported by Dalian Science and Technology Foundation,China
Project(KFJJ10-1Z) supported by the State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,China
Project(Y4090507) supported by the Zhejiang Basic Research Program of China
