Mechanochemical synthesis and thermal decomposition of Mg(AlH4)2

被引：60

作者：

Kim, Yoonyoung

Lee, Eung-Kyu

Shim, Jae-Hyeok

Cho, Young Whan ^{[1
]}

Yoon, Kyung Byung

机构：

[1] Korea Inst Sci & Technol, Nanomat Res Ctr, Seoul 136791, South Korea

[2] Sogang Univ, Dept Chem, Seoul 121742, South Korea

[3] Sogang Univ, Ctr Microcrystal Assembly, Seoul 121742, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 422卷 / 1-2期

关键词：

magnesium alanate; complex metal hydride; hydrogen storage material; thermal decomposition;

D O I：

10.1016/j.jallcom.2005.11.063

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnesium alanate Mg(AlH4)(2) has been synthesized by mechanochemically activated metathesis reaction between NaAlH4 and MgCl2 without solvent, this metathesis reaction proceeded completely. The thermal decomposition behavior of solvent-free Mg(AlH4)(2) has been analyzed by TG/MS and DSC. It has been confirmed that Mg(AlH4)(2) decomposes in two steps: the first decomposition reaction Mg(AlH4)(2) -> MgH2 + 2Al + 3H(2) is exothermic and starts at about 115 degrees C. The second one MgH2 + 2Al -> 1/2Al(3)Mg(2) + 1/2Al + H-2 is endothermic in total and starts at about 240 degrees C, although the formation reaction of Al3Mg2 (3Al + 2Mg -> Al3Mg2) is exothermic. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：283 / 287

页数：5

共 23 条

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