title: Facile formation of thermodynamically unstable novel borohydride materials by a wet chemistry route.
abstract: A novel wet synthetic method utilizing weakly coordinating anions that yields LiCl-free Zn-based materials for hydrogen storage has recently been reported. Here we show that this method may also be applied for the synthesis of the pure yttrium derivatives, M[Y(BH4)4] (M = K, Rb, Cs). Moreover, it can be extended to the preparation of previously unknown thermodynamically unstable derivatives, Li[Y(BH4)4] and Na[Y(BH4)4]. Importantly, these two H-rich phases cannot be accessed by standard dry (mechanochemical) or solid/gas synthetic methods due to the thermodynamic obstacles. Here we describe their crystal structures and selected important physicochemical properties.
authors: Center of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02-089 Warsaw (Poland). tjaron@uw.edu.pl.
authors: Tomasz
authors: T
authors: Jaroń
authors: Wojciech
authors: W
authors: Wegner
authors: Karol J
authors: KJ
authors: Fijałkowski
authors: Piotr J
authors: PJ
authors: Leszczyński
authors: Wojciech
authors: W
authors: Grochala
keywords: borohydrides; hydrogen storage materials; weakly coordinating anions; wet chemistry; yttrium