中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 20 No. 8 August 2010 |
（1. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics,
Chinese Academy of Sciences, Dalian 116023, China;
2. Department of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China;
3. College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China）
Abstract: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.
Key words: hydrogen storage; hydrogenation kinetic; Ti0.9 Zr0.2 Mn1.5 Cr0.3 alloy; catalytic effect
