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Eutectic Phenomenon of LiNH?-KH Composite in MH-NH? Hydrogen Storage System.

ABSTRACT: Hydrogenation of a lithium-potassium (double-cation) amide (LiK(NH?)?), 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 (LiNH?) and KH are generated after hydrogenation at 160 °C as an intermediate. It is noteworthy that the mixture of LiH and KNH? has a much lower melting point than that of the individual melting points of LiNH? and KH, which is recognized as a eutectic phenomenon. The hydrogenation temperature of LiNH? in the mixture is found to be significantly lower than that of LiNH? itself. This improvement of reactivity must be due to kinetic modification, induced by the enhanced atomic mobility due to the eutectic interaction.

SUBMITTER: Goshome K

PROVIDER: S-EPMC6479683 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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

Goshome Kiyotaka K Jain Ankur A Miyaoka Hiroki H Yamamoto Hikaru H Kojima Yoshitsugu Y Ichikawa Takayuki T

Molecules (Basel, Switzerland) 20190405 7

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. ...[more]

PMID: 30959780

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