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 MgH 2 with ammonia at 613 K and 653 K, respectively. Subsequently, Mg(NH2)2 was mixed with different molars of MgH 2 or LiH in order to systematically investigate the dehydriding properties. With increasing temperature, the mixtures of Mg(NH2) 2 and MgH2 desorb ammonia at approximately 630 K, similar to the decomposition reaction of Mg(NH2)2 alone. On the other hand, the mixture of Mg(NH2)2 and 4 M of LiH desorbs only hydrogen during heating because of the "ultra-fast" reaction of LiH with ammonia from Mg(NH2)2, unlike MgH2.
- Hydrogen storage
- Solid-gas reaction
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering