Rapid microwave synthesis, characterization and reactivity of lithium nitride hydride, Li4NH

Tapia-Ruiz, N., Sorbie, N., Vaché, N., Hoang, T. K.A. and Gregory, D. H. (2013) Rapid microwave synthesis, characterization and reactivity of lithium nitride hydride, Li4NH. Materials, 6(11), pp. 5410-5426. (doi: 10.3390/ma6115410)

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Publisher's URL: http://dx.doi.org/10.3390/ma6115410

Abstract

Lithium nitride hydride, Li<sub>4</sub>NH, was synthesised from lithium nitride and lithium hydride over minute timescales, using microwave synthesis methods in the solid state for the first time. The structure of the microwave-synthesised powders was confirmed by powder X-ray diffraction [tetragonal space group I4<sub>1</sub>/a; a = 4.8864(1) Å, c = 9.9183(2) Å] and the nitride hydride reacts with moist air under ambient conditions to produce lithium hydroxide and subsequently lithium carbonate. Li<sub>4</sub>NH undergoes no dehydrogenation or decomposition [under Ar<sub>(g)</sub>] below 773 K. A tetragonal–cubic phase transition, however, occurs for the compound at ca. 770 K. The new high temperature (HT) phase adopts an anti-fluorite structure (space group Fm 3̅ m; a = 4.9462(3) Å) with N<sup>3−</sup> and H<sup>−</sup> ions disordered on the 4a sites. Thermal treatment of Li4NH under nitrogen yields a stoichiometric mixture of lithium nitride and lithium imide (Li<sub>3</sub>N and Li<sub>2</sub>NH respectively).

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Tapia, Miss Nuria and Hoang, Dr Tuan and Sorbie, Miss Natalie and Gregory, Professor Duncan
Authors: Tapia-Ruiz, N., Sorbie, N., Vaché, N., Hoang, T. K.A., and Gregory, D. H.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Materials
Publisher:MDPI
ISSN:1996-1944
ISSN (Online):1996-1944
Copyright Holders:Copyright © 2013 The Authors
First Published:First published in Materials 6(11):5410-5426
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
557701Crossing Boundaries in Energy StorageDuncan GregoryEngineering & Physical Sciences Research Council (EPSRC)EP/I022570/1CHEM - CHEMISTRY