New Metal−N−H System Composed of Mg(NH2)2 and LiH for Hydrogen Storage
New Metal−N−H System Composed of Mg(NH2)2 and LiH for Hydrogen Storage
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DOI：
10.1021/jp048002j
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发表时间：
2004-06
影响因子：
3.3
通讯作者：
H. Leng;T. Ichikawa;S. Hino;Nobuko Hanada;S. Isobe;H. Fujii
中科院分区：
文献类型：
--
作者：
H. Leng;T. Ichikawa;S. Hino;Nobuko Hanada;S. Isobe;H. Fujii
本文研究了在室温下通过球磨MgH_2合成Mg（NH_2）_2后，球磨3 Mg（NH_2）_2和8LiH混合物的储氢性能。不含任何催化剂的混合物的热脱附质谱表明，在5 °C/min的加热速率下，从140 °C开始脱附了大量氢（0.7wt%），脱附峰值为0.190 °C，几乎没有氨排放。此外，氢吸收/解吸反应的可逆性被证实是完全的。上述结果表明，该体系是一种很有前途的金属-N-H储氢体系。
We have investigated the hydrogen storage properties of a ball-milled mixture of 3Mg(NH2)2 and 8LiH after first synthesizing Mg(NH2)2 by ball milling MgH2 under an atmosphere of NH3 gas at room temperature. The thermal desorption mass spectra of the mixture without any catalysts indicated that a large amount of hydrogen (∼7 wt %) was desorbed from 140 °C, and the desorption peaked at ∼190 °C under a heating rate of 5 °C/min with almost no ammonia emission. Moreover, the reversibility of the hydrogen absorption/desorption reactions was confirmed to be complete. The above results indicate that this system is one of the promising metal−N−H systems for hydrogen storage.