Catalytic effect of Ge on hydrogen desorption from MgH2
Catalytic effect of Ge on hydrogen desorption from MgH2
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DOI：
10.1016/s0925-8388(01)01786-8
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发表时间：
2002-02-28
影响因子：
6.2
通讯作者：
Meyer, G
中科院分区：
文献类型：
--
作者：
Gennari, FC;Castro, FJ;Meyer, G
研究了室温下机械合金化制备的MgH_2在氢气氛中的放氢行为。通过X射线衍射、差示扫描量热法、热脱附光谱和扫描电子显微镜对产物的结构和形态特征以及脱附动力学进行了研究。Mg-Ge混合物在氢气下的机械研磨导致Mg 2Ge和MgH 2的形成。Ge的存在使氢化物分解温度在50至150 ℃的范围内降低，这取决于Ge的量。相反，Mg_2Ge对氢的脱附没有任何影响。(C)2002 Elsevier Science B. V.保留所有权利。
We studied the influence of Ge on hydrogen desorption from MgH2 produced by mechanical alloying at room temperature under a hydrogen atmosphere. The structural and morphological properties, and the desorption kinetics of the products were examined by X-ray diffraction, differential scanning calorimetry, thermal desorption spectroscopy and scanning electron microscopy. The mechanical milling of Mg-Ge mixtures under hydrogen leads to the formation of Mg2Ge and MgH2. The presence of Ge decreases the hydride decomposition temperature in a range from 50 to 150degreesC, depending on the Ge amount. On the contrary, Mg2Ge does not show any effect on hydrogen desorption. (C) 2002 Elsevier Science B.V. All rights reserved.