Résumé
In the beginning of the 2000s, a big interest has been given to ammonia borane (NH3BH3), in the field of solid-state hydrogen storage by the fact that it contains three hydridic hydrogens (3 Hδ-) and three protic hydrogens (3 Hδ+). It has high gravimetric hydrogen with 19.6 wt% H: this has attracted a flurry of recent investigations focusing on hydrogen release from it [1]. In this dynamic context, other nitrogen-containing boranes have been considered. One of these materials is hydrazine borane (N2H4BH3) prepared from sodium borohydride and hydrazine hemisulfate. Like ammonia borane, it has high gravimetric capacity hydrogen, with 15.4 wt%, owing to 4 Hδ+ and 3 Hδ- [2]. Under heating, its dehydrogenation starts at 60°C, but high amounts of the unwanted and toxic hydrazine N2H4 are released. Alternatives have thus been searched for with the objective to propose materials that produces pure hydrogen. The alkali hydrazinidoboranes (MN2H3BH3) are indeed potential candidates for chemical hydrogen storage. When reacted with an alkali hydride MH (M = Li, Na, K), hydrazine borane transforms to such hydrazinidoborane derivative [3]. Another strategy is to make hydrazine borane react with an alkali amide. We have considered both approaches, the latter being the newer. Recently, we used the hydrogen-rich rich lithium amide LiNH2 (8.7 wt% H) to make it react with the borane (ball-milling) and get a new material. The as-obtained samples were fully characterized. They were especially scrutinized by XRD while using tools dedicated to crystallography and to solve the structures. The IDHEA 2016 meeting will thus be a great opportunity to present, for the first time, our results about the aforementioned novel material intended to be considered as potential solidstate chemical hydrogen storage material.References:[1] (a) P.V. Ramachandran, P.D. Gagare, Inorg. Chem. 46 (2007) 7810-7817; (b) F.H. Stephens, V. Pons, R.T.Baker, Dalton Trans. 25 (2007) 2613-2626; (c) A. Kantürk Figen, M.B. Pişkin, B. Coşkuner, V. İmamoğlu, Int.J. Hydrogen Energy 36 (2013) 16215-16228.[2] R. Moury, G. Moussa , U.B. Demirci, J. Hannauer, S. Bernard, E. Petit, A. van der Lee, P. Miele. Phys.Chem. Chem. Phys. 14 (2012) 1768-1777.[3] (a) H. Wu, W. Zhou, F. E. Pinkerton, T. J. Udovic, T. Yildirim, J.J. Rush, Energy Environ. Sci. 5 (2012)7531-7535; (b) R. Moury, U.B. Demirci, V. Ban, Y. Filinchuk, T. Ichikawa, L. Zeng, K. Goshome, P. Miele,Chem. Mater. 26 (2014) 3249-3255; (c) G. Moussa, R. Moury, U.B. Demirci, T. Sener, P. Miele, Int. J. EnergyRes. 37 (2013) 825-842; (d) R. Moury, U.B. Demirci, T. Ichikawa, Y. Filinchuk, R. Chiriac, A. Van der Lee, P.Miele, Chem. Sus. Chem. 6 2013 667-673.