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Open AccessFeature PaperArticle

Eutectic Phenomenon of LiNH2-KH Composite in MH-NH3 Hydrogen Storage System

1
Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama, Fukushima 963-0298, Japan
2
Natural Science Center for Basic Research and Development, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, Japan
3
Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, Japan
4
Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
*
Authors to whom correspondence should be addressed.
Molecules 2019, 24(7), 1348; https://doi.org/10.3390/molecules24071348
Received: 20 February 2019 / Revised: 28 March 2019 / Accepted: 4 April 2019 / Published: 5 April 2019
(This article belongs to the Special Issue Advances in Hydrogen Storage Materials Research)
Hydrogenation of a lithium-potassium (double-cation) amide (LiK(NH2)2), which is generated as a product by ammonolysis of litium hydride and potassium hydride (LiH-KH) composite, is investigated in details. As a result, lithium amide (LiNH2) and KH are generated after hydrogenation at 160 °C as an intermediate. It is noteworthy that the mixture of LiH and KNH2 has a much lower melting point than that of the individual melting points of LiNH2 and KH, which is recognized as a eutectic phenomenon. The hydrogenation temperature of LiNH2 in the mixture is found to be significantly lower than that of LiNH2 itself. This improvement of reactivity must be due to kinetic modification, induced by the enhanced atomic mobility due to the eutectic interaction. View Full-Text
Keywords: hydrogen carrier; ammonia; metal hydride; double-cation amide; eutectic melting hydrogen carrier; ammonia; metal hydride; double-cation amide; eutectic melting
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Goshome, K.; Jain, A.; Miyaoka, H.; Yamamoto, H.; Kojima, Y.; Ichikawa, T. Eutectic Phenomenon of LiNH2-KH Composite in MH-NH3 Hydrogen Storage System. Molecules 2019, 24, 1348.

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