Mg3MM compound based hydrogen storage materials
Mg3MM compound based hydrogen storage materials
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DOI：
10.1016/j.jallcom.2007.02.160
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发表时间：
2007-10-31
影响因子：
6.2
通讯作者：
Zhu, M.
中科院分区：
文献类型：
--
作者：
Ouyang, L. Z.;Dong, H. W.;Zhu, M.
采用x射线衍射仪（XRD）、能量色散x射线能谱仪（EDX）和压力-成分等温线（PCIs）测量方法研究了感应熔炼法制备的Mg-Mm （Mm是misch metal的缩写）和Mg-Mm- ni合金的储氢性能、组成和相结构。研究发现，具有D0(3)结构的Mg3MM化合物在室温下具有快速的氢化动力学。氢对Mg(3)Mm和Mg(3)MmNi（0.1）的解吸。合金在281℃和250℃下生成，可逆储氢量分别达到2.91%和2.51%。用范霍夫图测定了Mg(3)Mm-H脱氢反应的焓H和熵S。测定了Mg(3)Mm合金在室温下的吸氢动力学，用Avrami-Erofeev方程可以很好地拟合实验曲线。(D 2007 Elsevier B.V.版权所有
Hydrogen storage properties, composition and phase structures of the Mg-Mm (Mm is abbreviated for misch metal) and Mg-Mm-Ni alloys prepared by induction melting were investigated by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and pressure-composition-isotherms (PCIs) measurement. It has been found that the Mg3MM Compound with the D0(3) structure can absorb hydrogen at room temperature with rapid hydriding kinetics. The desorption of hydrogen Of Mg(3)Mm and Mg(3)MmNi(0.1). alloys takes place at 281 and 250 degrees C and the reversible hydrogen storage capacities reach 2.91 and 2.51 wt.%, respectively. The enthalpy (Delta H) and entropy (Delta S) Of Mg(3)Mm-H dehydriding reaction were determined by using, van't Hoff plot. Hydrogen absorption kinetics of the Mg(3)Mm alloy at room temperature was also measured and the experimental curves can be well fitted by using Avrami-Erofeev equation. (D 2007 Elsevier B.V. All rights reserved.