Hydrogen release from Mg(NH2)2-MgH2 through mechanochemical reaction

被引：93

作者：

Hu, Jianjiang

Wu, Guotao

Liu, Yongfeng

Xiong, Zhitao

Chen, Ping ^{[1
]}

Murata, Kenji

Sakata, Ko

Wolf, Gerd

机构：

[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[2] Inst Appl Energy, Tokyo, Japan

[3] Inst Phys Chem, D-09596 Freiberg, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 30期

关键词：

D O I：

10.1021/jp061279u

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：

A total of 7.4 wt % of hydrogen was released from the mixture of magnesium amide and magnesium hydride at a molar ratio of 1:2 by mechanical ball milling. Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD) characterizations along with the amount of hydrogen released at different stages of ball milling reveal that magnesium imide was first formed in the reaction. The imide then reacted continuously with magnesium hydride and was converted to magnesium nitride and hydrogen. Thermodynamic calculation shows that the hydrogen desorption is a mild endothermic reaction with the standard enthalpy change of about 3.5 kJ/mol of H-2.

引用

页码：14688 / 14692

页数：5

共 21 条

[1]

Aylward G. H., 1998, SI CHEM DATA

[2] Ti-doped alkali metal aluminium hydrides as potential novel reversible hydrogen storage materials [J].