中文摘要：

采用球磨法制备了3LiBH4/CeF3反应体系,通过压力-组成-温度（PCT）测试仪、X射线衍射仪（XRD）和傅里叶变换红外光谱仪（FTIR）研究了体系的放氢性能、反应机制及性能改善机理.结果表明,3LiBH4/CeF3体系在295℃左右快速放氢,总放氢量为4.1%（质量分数）.放氢过程中CeF3与LiBH4直接发生反应：3LiBH4＋CeF3→31/2Ce B6＋1/2CeH2＋3LiF＋11/2H2.与纯Li BH4相比,放氢热力学稳定性和表观活化能的降低是3LiBH4/CeF3体系放氢温度下降的主要原因.

英文摘要：

The 3LiBH4/ CeF3 reactive system was prepared by ball-milling treatment. Its dehydrogenation property and reaction as well as the property improvement mechanism were investigated by pressure-composition-temperature（ PCT） analyser,X-ray diffractometer（ XRD） and Fourier transform infrared spectrometer（ FTIR）. It was found that the 3LiBH4/ CeF3 system fast released hydrogen at about 295 ℃ with about 4. 1%（ mass fraction） of hydrogen totally desorbed. During the dehydrogenation process,CeF3 reacted directly with Li BH4 according to the reaction 3LiBH4＋ Ce F3→1 /2Ce B6＋ 1 /2Ce H2＋ 3LiF ＋ 11 /2H2. In comparison with pristine Li BH4,the decrease in dehydrogenation thermodynamic stability and apparent activation energy are the main reasons for the declined dehydrogenation temperature of the 3LiBH4/ CeF3 system.