Garroni, Sebastiano and Milanese, Chiara and Girella, Alessandro and Marini, Amedeo and Mulas, Gabriele Raimondo Celestino and Menéndez Dalmau, Enric and Pistidda, Claudio and Dornheim, Martin and Suriñach, Santiago and Baró, Maria Dolores (2010) Sorption properties of NaBH4/MH2 (M = Mg, Ti) powder systems. International Journal of Hydrogen Energy, Vol. 35 (11), p. 5434-5441. ISSN 0360-3199. Article.
Full text not available from this repository.
The sorption properties of NaBH4/MH2 (M = Mg, Ti) powder systems prepared by high-energy ball milling have been thoroughly investigated. Concerning the systems containing MgH2, the 2:1 and 1:2 molar compositions have been studied and both lead to a multi-step desorption pathway, where the formation of MgB2 confirms the destabilization of NaBH4 induced by the presence of MgH2. A noticeable kinetic enhancement is achieved for the MgH2-rich system (composition 1:2) if compared with the NaBH4-rich system (composition 2:1). Even though full re-absorption is obtained for neither of the two compositions, fast kinetics is achieved. During absorption, the unsuspected formation of the perovskite-type hydride NaMgH3 is detected and it is showed that this ternary phase contributes to reduce the gravimetric capacity of the systems. Conversely, in the 2NaBH4/TiH2 system, there is no formation of the intermetallic compound TiB2. Furthermore, a decrease in the sorption kinetics is found in comparison with the systems based on MgH2.
I documenti depositati in UnissResearch sono protetti dalle leggi che regolano il diritto d'autore
Repository Staff Only: item control page