Crystal Structure and Hydrogen Storage Behaviors of Mg/MoS2 Composites from Ball Milling  

作　　者：韩宗盈 周仕学 WANG Naifei ZHANG Qianqian ZHANG Tonghuan RAN Weixian 

机构地区：[1]College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China [2]School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2016年第4期773-778,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.21176145);Graduate Student Innovation Fund of Shandong University of Science and Technology(YC140342)

摘　　要：The Mg/MoS2 composites were prepared by ball milling under argon atmosphere,and the effect of MoS2 on the crystal structure and hydrogen storage properties of Mg was investigated.It is found that 10 wt% of MoS2 is sufficient to prevent particle aggregation and cold welding during the milling process.The crystallite size of Mg will remain constant at slightly less than 38.8 nm with the milling process due to the size confinement effect of MoS2.The dehydrogenation temperature of MgH2 is reduced to 390.4-429.4 ℃ due to the crystallite size reduction.Through fitting by Johnson-Mehl-Avrami model,it is found that Mg crystal grows by three dimension controlled by interface transformation during the process of MgH2 decomposition.MoS2 has a weak catalyst effect on the decomposition of MgH2 and activation energy of 148.9 k J/mol is needed for the dehydrogenation process calculated by the Arrhenius equation.The Mg/MoS2 composites were prepared by ball milling under argon atmosphere,and the effect of MoS2 on the crystal structure and hydrogen storage properties of Mg was investigated.It is found that 10 wt% of MoS2 is sufficient to prevent particle aggregation and cold welding during the milling process.The crystallite size of Mg will remain constant at slightly less than 38.8 nm with the milling process due to the size confinement effect of MoS2.The dehydrogenation temperature of MgH2 is reduced to 390.4-429.4 ℃ due to the crystallite size reduction.Through fitting by Johnson-Mehl-Avrami model,it is found that Mg crystal grows by three dimension controlled by interface transformation during the process of MgH2 decomposition.MoS2 has a weak catalyst effect on the decomposition of MgH2 and activation energy of 148.9 k J/mol is needed for the dehydrogenation process calculated by the Arrhenius equation.

关 键 词：crystallite milling confinement aggregation fitting argon agglomeration magnesium subsequent hydrogenation 

分 类 号：TB33[一般工业技术—材料科学与工程]