Hydrogen desorption mechanism of 2NaBH4 + MgH2 composite prepared by high-energy ball milling

被引：70
|
作者：
Garroni, S. [1 ]
Pistidda, C. [2 ]
Brunelli, M. [3 ]
Vaughan, G. B. M. [3 ]
Surinach, S. [1 ]
Baro, M. D. [1 ]
机构：
[1] Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Spain
[2] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany
[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France
来源：
SCRIPTA MATERIALIA | 2009年 / 60卷 / 12期
关键词：
Mechanical milling; Scanning electron microscopy (SEM); Synchrotron radiation; X-ray diffraction (XRD); Hydrogen storage; MAGNESIUM; HYDRIDE; STORAGE; MGB2;
D O I：
10.1016/j.scriptamat.2009.02.059
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The desorption mechanism of 2NaBH(4) + MgH2 Composite has been investigated. The results show that the chemical interaction between MgH2 and NaBH4 is capable of decreasing the dehydrogenation temperature with respect to the single compounds. The dehydriding reaction starts at around 320 degrees C with the desorption of the MgH2 to Mg and proceeds via the chemical dismutation of NaBH4 in NaH and an intermediate specie. In situ synchrotron X-ray powder diffraction indicates that MgB2 is one of the final reaction products. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1129 / 1132
页数：4
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