Eutectic Phenomenon of LiNH(2)-KH Composite in MH-NH(3) Hydrogen Storage System

Hydrogenation of a lithium-potassium (double-cation) amide (LiK(NH(2))(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 (LiNH(2)) and KH are generated after hydrogenation at 160 °C a...

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Detalles Bibliográficos
Autores principales: Goshome, Kiyotaka, Jain, Ankur, Miyaoka, Hiroki, Yamamoto, Hikaru, Kojima, Yoshitsugu, Ichikawa, Takayuki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6479683/
https://www.ncbi.nlm.nih.gov/pubmed/30959780
http://dx.doi.org/10.3390/molecules24071348
Descripción
Sumario:Hydrogenation of a lithium-potassium (double-cation) amide (LiK(NH(2))(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 (LiNH(2)) and KH are generated after hydrogenation at 160 °C as an intermediate. It is noteworthy that the mixture of LiH and KNH(2) has a much lower melting point than that of the individual melting points of LiNH(2) and KH, which is recognized as a eutectic phenomenon. The hydrogenation temperature of LiNH(2) in the mixture is found to be significantly lower than that of LiNH(2) 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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