Synthesis and dehydriding studies of Mg–N–H systems
Synthesis and dehydriding studies of Mg–N–H systems
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DOI：
10.1016/j.jpowsour.2004.06.026
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发表时间：
2004-11
影响因子：
9.2
通讯作者：
Y. Nakamori;G. Kitahara;S. Orimo
中科院分区：
文献类型：
--
作者：
Y. Nakamori;G. Kitahara;S. Orimo
近年来，轻元素酰胺和酰亚胺被认为是高性能储氢材料的潜在候选者。本研究利用氢氧化镁与氨气在613K和653K下的固气反应，成功地合成了单相的氨基镁(Mg(NH2)2)和亚胺镁(MgNH)。随后，将氢氧化镁与不同摩尔分数的氢氧化镁或氢化锂混合，系统地研究了氢氧化镁的脱水性能。随着温度的升高，Mg(NH_2)_2和Mg_2O_2的混合物在约630K时解吸氨，类似于单独的Mg(NH_2)_2的分解反应。另一方面，与氢化镁不同，氢化锂和4M氢化锂的混合物在加热过程中只解吸氢气，因为氢化锂与氢化镁中的氨发生了“超快”反应。
Light-elemental amides and imides are recently regarded as potential candidates for high-performance hydrogen storage materials. In this studies, the single phases magnesium amide (Mg(NH2)2) and magnesium imide (MgNH) were successfully prepared by solid–gas reactions of MgH2with ammonia at 613K and 653K, respectively. Subsequently, Mg(NH2)2was mixed with different molars of MgH2or LiH in order to systematically investigate the dehydriding properties. With increasing temperature, the mixtures of Mg(NH2)2and MgH2desorb ammonia at approximately 630K, similar to the decomposition reaction of Mg(NH2)2alone. On the other hand, the mixture of Mg(NH2)2and 4M of LiH desorbs only hydrogen during heating because of the “ultra-fast” reaction of LiH with ammonia from Mg(NH2)2, unlike MgH2.