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Lithium Hydrazinidoborane Ammoniate LiN2H3BH3·0.25NH3, a Derivative of Hydrazine Borane

IEM (Institut Europeen des Membranes), UMR5635 (CNRS, ENSCM, UM), Universite de Montpellier, Place Eugene Bataillon, CC047, F-34095 Montpellier, France
ICGM (Institut Charles Gerhardt Montpellier), UMR 5253 (CNRS UM ENSCM), Université de Montpellier, CC 15005, Place Eugène Bataillon, F-34095 Montpellier cedex 05, France
Univ Lyon, Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces UMR CNRS 5615, LMI, F-69622 Villeurbanne, France
Author to whom correspondence should be addressed.
Materials 2017, 10(7), 750;
Received: 14 June 2017 / Revised: 27 June 2017 / Accepted: 29 June 2017 / Published: 5 July 2017
(This article belongs to the Section Energy Materials)
PDF [1632 KB, uploaded 5 July 2017]


Boron- and nitrogen-based materials have shown to be attractive for solid-state chemical hydrogen storage owing to gravimetric hydrogen densities higher than 10 wt% H. Herein, we report a new derivative of hydrazine borane N2H4BH3, namely lithium hydrazinidoborane ammoniate LiN2H3BH3·0.25NH3. It is easily obtained in ambient conditions by ball-milling N2H4BH3 and lithium amide LiNH2 taken in equimolar amounts. Both compounds react without loss of any H atoms. The molecular and crystallographic structures of our new compound have been confirmed by NMR/FTIR spectroscopy and powder X-ray diffraction. The complexation of the entity LiN2H3BH3 by some NH3 has been also established by thermogravimetric and calorimetric analyses. In our conditions, LiN2H3BH3·0.25NH3 has been shown to be able to release H2 at temperatures lower than the parent N2H4BH3 or the counterpart LiN2H3BH3. It also liberates non-negligible amounts of NH3 at temperatures lower than 100 °C. This is actually quite detrimental for chemical H storage, but alternatively LiN2H3BH3·0.25NH3 might be seen as a potential NH3 carrier. View Full-Text
Keywords: ammonia carrier; ammoniate; borane; hydrazine borane; hydrazinidoborane; chemical hydrogen storage ammonia carrier; ammoniate; borane; hydrazine borane; hydrazinidoborane; chemical hydrogen storage

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Ould-Amara, S.; Granier, D.; Chiriac, R.; Toche, F.; Yot, P.G.; Demirci, U.B. Lithium Hydrazinidoborane Ammoniate LiN2H3BH3·0.25NH3, a Derivative of Hydrazine Borane. Materials 2017, 10, 750.

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