Rapid Microwave Synthesis, Characterization and Reactivity of Lithium Nitride Hydride, Li4NH
| Autor: | Nuria Tapia-Ruiz, Tuan K. A. Hoang, Nicolas Vaché, Natalie Sorbie, Duncan H. Gregory |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
synthesis
Inorganic chemistry diffraction Lithium imide hydride 02 engineering and technology Nitride 010402 general chemistry 01 natural sciences lcsh:Technology Lithium hydroxide microwaves hydrogen storage chemistry.chemical_compound Hydrogen storage General Materials Science structure nitride thermal analysis reactivity Lithium nitride lcsh:Microscopy lcsh:QC120-168.85 lcsh:QH201-278.5 Hydride lcsh:T Lithium carbonate 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Lithium hydride lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 |
| Zdroj: | Materials; Volume 6; Issue 11; Pages: 5410-5426 Materials, Vol 6, Iss 11, Pp 5410-5426 (2013) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma6115410 |
| Popis: | Lithium nitride hydride, Li4NH, 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 I41/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. Li4NH undergoes no dehydrogenation or decomposition [under Ar(g)] 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 N3− and H− ions disordered on the 4a sites. Thermal treatment of Li4NH under nitrogen yields a stoichiometric mixture of lithium nitride and lithium imide (Li3N and Li2NH respectively). |
| Databáze: | OpenAIRE |
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