Probing the reaction pathway of dehydrogenation of the LiNH2+LiHmixture using in situ 1H NMR spectroscopy

被引：21

作者：

Hu, Jian Zhi ^{[1
]}

Kwak, Ja Hun ^{[1
]}

Yang, Zhenguo ^{[1
]}

Osborn, William ^{[2
]}

Markmaitree, Tippawan ^{[2
]}

Shaw, Leon L. ^{[2
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

[2] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA

来源：

JOURNAL OF POWER SOURCES | 2008年 / 181卷 / 01期

关键词：

NMR; mechanical activation; LiNH2; LiH; hydrogen storage;

D O I：

10.1016/j.jpowsour.2008.03.034

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：

Using variable temperature in situ H-1 NMR spectroscopy on a mixture of LiNH2 + LiH that was mechanically activated using high-energy ball milling, the dehydrogenation of the LiNH2 + LiH to Li2NH + H-2 Was investigated. The analysis indicates NH3 release at a temperature as low as 30 degrees C and rapid reaction between NH3 and LiH at similar to 150 degrees C. The transition from NH3 release to H-2 appearance accompanied by disappearance of NH3 confirms unambiguously the two-step elementary reaction pathway proposed by other workers. (C) 2008 Elsevier B.V. All rights reserved.

引用

收藏

页码：116 / 119

页数：4

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