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Volume 24 Issue 10
Oct.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(10): 1183-1191
Jian-zheng Song, Zi-yang Zhao, Xin Zhao, Rui-dong Fu,  and Shu-min Han, Hydrogen storage properties of MgH2 co-catalyzed by LaH3 and NbH, Int. J. Miner. Metall. Mater., 24(2017), No. 10, pp. 1183-1191. https://doi.org/10.1007/s12613-017-1509-z
Cite this article as:
Jian-zheng Song, Zi-yang Zhao, Xin Zhao, Rui-dong Fu,  and Shu-min Han, Hydrogen storage properties of MgH2 co-catalyzed by LaH3 and NbH, Int. J. Miner. Metall. Mater., 24(2017), No. 10, pp. 1183-1191. https://doi.org/10.1007/s12613-017-1509-z
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研究论文Open Access

Hydrogen storage properties of MgH2 co-catalyzed by LaH3 and NbH

  • State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China

  • College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China

  • 通讯作者:

    Shu-min Han    E-mail: hanshm@ysu.edu.cn

  • To improve the hydrogen storage properties of Mg-based alloys, a composite material of MgH2 + 10wt%LaH3 + 10wt%NbH was prepared by a mechanical milling method. The composite exhibited favorable hydrogen desorption properties, releasing 0.67wt% H2 within 20 min at 548 K, which was ascribed to the co-catalytic effect of LaH3 and NbH upon dehydriding of MgH2. By contrast, pure MgH2, an MgH2 + 20wt%LaH3 composite, and an MgH2 + 20wt%NbH composite only released 0.1wt%, 0.28wt%, and 0.57wt% H2, respectively, under the same conditions. Analyses by X-ray diffraction and scanning electron microscopy showed that the composite particle size was small. Energy-dispersive X-ray spectroscopic mapping demonstrated that La and Nb were distributed homogeneously in the matrix. Differential thermal analysis revealed that the dehydriding peak temperature of the MgH2 + 10wt%LaH3 + 10wt%NbH composite was 595.03 K, which was 94.26 K lower than that of pure MgH2. The introduction of LaH3 and NbH was beneficial to the hydrogen storage performance of MgH2.
    • Research ArticleOpen Access

    Hydrogen storage properties of MgH2 co-catalyzed by LaH3 and NbH

    + Author Affiliations
      Abstract
    • To improve the hydrogen storage properties of Mg-based alloys, a composite material of MgH2 + 10wt%LaH3 + 10wt%NbH was prepared by a mechanical milling method. The composite exhibited favorable hydrogen desorption properties, releasing 0.67wt% H2 within 20 min at 548 K, which was ascribed to the co-catalytic effect of LaH3 and NbH upon dehydriding of MgH2. By contrast, pure MgH2, an MgH2 + 20wt%LaH3 composite, and an MgH2 + 20wt%NbH composite only released 0.1wt%, 0.28wt%, and 0.57wt% H2, respectively, under the same conditions. Analyses by X-ray diffraction and scanning electron microscopy showed that the composite particle size was small. Energy-dispersive X-ray spectroscopic mapping demonstrated that La and Nb were distributed homogeneously in the matrix. Differential thermal analysis revealed that the dehydriding peak temperature of the MgH2 + 10wt%LaH3 + 10wt%NbH composite was 595.03 K, which was 94.26 K lower than that of pure MgH2. The introduction of LaH3 and NbH was beneficial to the hydrogen storage performance of MgH2.
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