Behavior of Lithium Amide Under Argon Plasma

Alkali and alkaline earth metal amides are a type of functional materials for hydrogen storage, thermal energy storage, ion conduction, and chemical transformations such as ammonia synthesis and decomposition. The thermal chemistry of lithium amide (LiNH2), as a simple but representative alkali or a...

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Bibliographic Details
Published in:ChemSusChem 2024-09, Vol.17 (18), p.e202400221-n/a
Main Authors: Wen, Jiaqi, Wen, Hong, Wu, Han, Yang, Liang, Guan, Yeqin, Cai, Yongli, Gao, Wenbo, Wang, Qianru, Zhang, Shaoqian, Guo, Jianping, Chen, Ping
Format: Article
Language:English
Subjects:
Alkaline earth metals
Ambient temperature
Amides
Ammonia
ammonia decomposition
Argon plasma
chemical looping
Chemical synthesis
Colloiding
Decomposition reactions
Functional materials
Heat treatment
Hydrogen storage
Lithium
lithium amide
lithium colloids
Nitrogen plasma
Plasma
Reaction products
Thermal energy
Thermal transformations
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Summary:Alkali and alkaline earth metal amides are a type of functional materials for hydrogen storage, thermal energy storage, ion conduction, and chemical transformations such as ammonia synthesis and decomposition. The thermal chemistry of lithium amide (LiNH2), as a simple but representative alkali or alkaline earth metal amide, has been well studied previously encouraged by its potentials in hydrogen storage. In comparison, little is known about the interaction of plasma and LiNH2. Herein, we report that the plasma treatment of LiNH2 in an Ar flow under ambient temperature and pressure gives rise to distinctly different reaction products and reaction pathway from that of the thermal process. We found that plasma treatment of LiNH2 leads to the formation of Li colloids, N2, and H2 as observed by UV‐vis absorption, EPR, and gas products analysis. Inspired by this very unique interaction between plasma and LiNH2, a chemical loop for ammonia decomposition to N2 and H2 mediated by LiNH2 was proposed and demonstrated. LiNH2 under Argon plasma gives rise to the formation of Li colloids, N2, and H2, which is distinctly different from that of the thermal decomposition process in terms of products and reaction pathway. Inspired by this very unique behavior, a chemical loop for ammonia decomposition to N2 and H2 mediated by LiNH2 is proposed.
ISSN:1864-5631
1864-564X
1864-564X
DOI:10.1002/cssc.202400221