Hydrogen storage properties of γ–Mg(BH4)2 modified by MoO3 and TiO2. (28th September 2015)

• Record Type: Journal Article
• Authors: Saldan, I.; Frommen, C.; Llamas-Jansa, I.; Kalantzopoulos, G.N.; Hino, S.; Arstad, B.; Heyn, R.H.; Zavorotynska, O.; Deledda, S.; Sørby, M.H.; Fjellvåg, H.; Hauback, B.C.
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 36(2015)
• Page Start: 12286
• Page End: 12293
• Publication Date: 2015-09-28
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.07.082
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">The reversible hydrogen desorption–absorption of γ–Mg(BH₄)₂ ball milled with MoO₃ and TiO₂ has been investigated. No mechanochemical interaction between γ–Mg(BH₄)₂ and TiO₂ was observed while for the 1:1 M ratio with MoO₃, MoB₂ was formed. There was little difference in the properties of γ–Mg(BH₄)₂ and γ–Mg(BH₄)₂ ball–milled with 0.02 mol percent TiO₂ and MoO₃. However, mixing in the same ratio γ–Mg(BH₄)₂ with TiO₂ and MoO₃ that had previously been subjected to high energy milling provided significant effects. For these materials, the DSC peaks appeared broader and were shifted to slightly lower temperatures, while the TPD peaks were decreased by ca. 20 °C, as compared to the pure γ–Mg(BH₄)₂. Faster hydrogen desorption kinetics was observed for the γ–Mg(BH₄)₂–MoO₃ mixture. The reversible hydrogen storage capacity of γ–Mg(BH₄)₂–TiO₂ at 271 °C was found to be 2.4 wt% H₂ in the first cycle.</p> </sec> </abstract>