中文摘要：

研究了TiF3的添加对氢化燃烧合成Mg95Ni5放氢性能的影响。添加1％（摩尔分数，下同）TiF3机械球磨10h可使Mg95Ni5的放氢性能达到最佳，在523K时，1800s内的放氢量可达到5．20％（质量分数，下同），并使放氢反应的表观活化能从Mg95Ni5的124kJ／tool降低到86kJ／mol。研究表明，TiF3的催化作用可归因于生成的MgF2和Ti2＋的氢化物减弱了Mg—H键。

英文摘要：

Effect of TiF3 addition as the catalyst on the hydrogen desorption property of Mg9sNi5 composites by hydriding combustion synthesis （HCS） was investigated. Addition of 1% TiF3 （molar fraction） can get the best hydrogen desorption property for Mg95Ni5 mechanically milled for 10 h, which could desorb 5.20% （mass fraction） of H2 in 1800 s at 523 K. The apparent activation energy of hydrogen desorption for Mg95Ni5＋1%TiF3 milled for 10 h was decreased to 86 kJ/mol from 124 kJ/mol of Mg95Ni5. Results show that catalytic effect of TiF3 could be attributed to the formation of MgF2 and Tix＋ hydrides which destabilize the bonding of Mg-H.