Enhancement of the Hydrogen Storage Properties of Mg/C Nanocomposites Prepared by Reactive Milling with Molybdenum  

作　　者：韩宗盈 周仕学 CHEN Haipeng NIU Haili WANG Naifei 

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)》2017年第2期299-304,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);the Graduate Student Innovation Fund of Shandong University of Science and Technology(YC140342)

摘　　要：The effect of Mo on the morphology, crystal structure and hydrogen sorption properties of Mg/C composites prepared by reactive milling was studied. Transmission electron microscopic（TEM） observation shows that Mg/C composites prepared with the addition of Mo are of nanoscale with particle size about 20-120 nm after 3 h of milling under 1 MPaH2. MgH2 of tetrahedral crystal structure predominates in the materials with the geometric shape of oblique hexagonal prism. From X-ray diffraction（XRD） and hydrogen content studies, Mo and crystallitic carbon have a synergistic effect on promoting the hydrogenation rate in the reactive milling process. From differential scanning calorimetric（DSC） studies, the dehydrogenation peak temperature of the Mg/C materials with Mo is lowered to 299-340 ℃.The effect of Mo on the morphology, crystal structure and hydrogen sorption properties of Mg/C composites prepared by reactive milling was studied. Transmission electron microscopic（TEM） observation shows that Mg/C composites prepared with the addition of Mo are of nanoscale with particle size about 20-120 nm after 3 h of milling under 1 MPaH2. MgH2 of tetrahedral crystal structure predominates in the materials with the geometric shape of oblique hexagonal prism. From X-ray diffraction（XRD） and hydrogen content studies, Mo and crystallitic carbon have a synergistic effect on promoting the hydrogenation rate in the reactive milling process. From differential scanning calorimetric（DSC） studies, the dehydrogenation peak temperature of the Mg/C materials with Mo is lowered to 299-340 ℃.

关 键 词：magnesium hydride reactive milling hydrogenation rate dehydrogenation temperature 

分 类 号：TB333[一般工业技术—材料科学与工程]