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Improved reversible dehydrogenation of 2LiBH4+MgH2 system by introducing Ni nanoparticles

机译：通过引入镍纳米粒子改善2LiBH4 + MgH2体系的可逆脱氢

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摘要

We report that the hydrogen de/resorption of the 2LiBH4+MgH2 system was modified by introducing Ni nanoparticles. Dehydrogenation analysis revealed that the first-step dehydrogenation, i.e., the decomposition of MgH2, can be significantly promoted by adding a small amount of Ni because of the catalytic effect. However, the improvement of the second-step dehydrogenation, corresponding to the decomposition of LiBH4, needs the addition of a large amount of Ni, resulting in the formation of a Mg-Ni-B ternary alloy. Furthermore, the presence of the Mg-Ni-B ternary alloy allowed an increased reversible H-capacity, in which about 5.3 wt% of hydrogen can be rehydrogenated under 400 °C and 55 bar hydrogen pressure over 10 h, which is higher than that of the pristine 2LiBH4+MgH2 system (4.4 wt%).
机译：我们报告2LiBH4 + MgH2系统的氢解吸/吸收是通过引入Ni纳米粒子而修饰的。脱氢分析表明，由于催化作用，通过添加少量的Ni可以显着促进第一步脱氢，即MgH 2的分解。然而，对应于LiBH 4分解的第二步脱氢的改进需要添加大量的Ni，导致形成Mg-Ni-B三元合金。此外，Mg-Ni-B三元合金的存在增加了可逆的H容量，其中大约5.3 wt％的氢可以在400°C和55 bar的氢气压力下在10 h内再氢化，高于原始的2LiBH4 + MgH2体系（4.4 wt％）。

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  • 来源
    《Journal of Materials Research》 |2011年第9期|p.1143-1150|共8页
  • 作者

    Jianfeng Mao; Zaiping Guo; Xuebin Yu; Huakun Liu;

  • 作者单位

    Institute for Superconducting and Electronic Materials, University of Wollongong,Wollongong, New South Wales 2522, Australia;

    Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia,and School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong,Wollongong, New South Wales 2522, Australia;

    Institute for Superconducting and Electronic Materials, University of Wollongong, New South Wales 2522,Australia,and Department of Materials Science, Fudan University, Shanghai 200433, China;

    Institute for Superconducting and Electronic Materials, University of Wollongong,Wollongong, New South Wales 2522, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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