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Updated: Jan 26, 2026

Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
Eutectic Phenomenon of LiNH₂-KH Composite in MH-NH₃ Hydrogen Storage System
Kiyotaka Goshome1, Ankur Jain2, Hiroki Miyaoka3
1Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama, Fukushima 963-0298, Japan. goshoume.kiyotaka@aist.go.jp.
Abstract:
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.
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