Improvement in hydrogen storage properties of MgH2 catalyzed with BaTiO3 additive

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Wang, J.S.^1,2 ; Zhang, W.^1 ; Han, S.M.^1,2 ; Qin, F.^2

State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao

066004, China^1

College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao

066004, China^2

关键词: BaTiO3 composites;    Dehydriding;    Hydrogen absorption;    Hydrogen pressures;    Hydrogen storage properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012053/pdf
DOI  :  10.1088/1757-899X/292/1/012053

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The MgH2+20 wt. % BaTiO3composites is prepared by ball milling MgH2with 20 wt. % BaTiO3, and the effect of BaTiO3on the hydrogen storage properties of the MgH2is investigated. TPD (Temperature-programmed-desorption) results showed that with addition of BaTiO3, the onset dehydrogenation temperature of the composite is 270 °C, which is 149 °C lower than that of pure MgH2. And the hydrogen absorption/desorption rates of MgH2+ 20 wt.% BaTiO3are 2.21 times and 2.12 times of pure MgH2at certain temperatures and hydrogen pressures, respectively. Furthermore, BaTiO3additives decreased the dehydriding activation energy of MgH2from 116 kJ/mol to 108 kJ/mol. BaTiO3plays an effective catalyst role in the hydrogenation/dehydrogenation process of MgH2.