Comparative investigations on the hydrogenation characteristics and hydrogen storage kinetics of melt-spun Mg10NiR (R = La, Nd and Sm) alloys

Comparative investigations on the hydrogenation characteristics and hydrogen storage kinetics of melt-spun Mg10NiR (R = La, Nd and Sm) alloys
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熔纺Mg10NiR(R=La、Nd、Sm)合金加氢特性及储氢动力学对比研究

DOI:
10.1016/j.ijhydene.2012.04.038
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发表时间:
2012-07
影响因子:
7.2
通讯作者:
Liu, D. D.
Liu, D. D.
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhang, Q. A.;Jiang, C. J.;Liu, D. D.

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对快淬Mg 10 NiR(R = La,Nd,Sm)合金的吸氢特性和贮氢动力学进行了比较研究。结果表明,快淬后的Mg 10 NiNd和Mg 10 NiSm合金均为非晶,而Mg 10 NiLa合金由非晶相和少量的La 2 Mg 17晶相组成。该合金可氢化成MgH 2、Mg 2NiH 4和稀土金属氢化物RHx。稀土金属氢化物和Mg 2NiH 4协同作用对Mg− H2体系中的吸氢-脱附反应提供催化作用。贮氢动力学不受不同稀土金属颗粒的影响,但受稀土金属颗粒粒径的影响。
The hydrogenation characteristics and hydrogen storage kinetics of the melt-spun Mg10NiR (R = La, Nd and Sm) alloys have been studied comparatively. It is found that the Mg10NiNd and Mg10NiSm alloys are in amorphous state but the Mg10NiLa alloy is composed of an amorphous phase and minor crystalline La2Mg17after melt-spinning. The alloys can be hydrogenated into MgH2, Mg2NiH4and a rare earth metal hydride RHx. The rare earth metal hydride and Mg2NiH4synergistically provide a catalytic effect on the hydrogen absorption–desorption reactions in the Mg−H2system. The hydrogen storage kinetics is not influenced by different rare earth metal hydrides but by the particle size of the rare earth metal hydrides.
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影响因子: 7.2
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