Characterisation of Mg–x wt.% FeTi (x = 5–30) and Mg–40 wt.% FeTiMn hydrogen absorbing materials prepared by mechanical alloying

Microstructural evolution during hydrogen sorption cycling of Mg–FeTi nanolayered composites

“…This material combines all aforementioned properties; Mg-Fe and Mg-Ti are immiscible [19] and FeTi is a well-known catalyst for hydrogen dissociation [20,21]. The activation barrier for hydrogen dissociation on Mg is around 1 eV/H 2 molecule (100 kJ mol À1 ) [4], whereas for FeTi this value is much lower, around 0.2 eV or 20 kJ/H 2 molecule [22].…”

The influence of ball milling process on hydrogenation properties of MgH2–FeTiHx composites

“…Unfortunately, large enthalpy of formation and high desorption temperature of the magnesium hydride (∼ 300 • C) exclude its usage in practical applications. However, it has been shown that compositing of MgH 2 with some intermetallic alloys can decrease the decomposition temperature of MgH 2 [1][2][3][4][5][6][7]. In this case the low temperature hydride counterpart acts as a catalyst which does not decrease dramatically a total capacity of the system.…”

Hydrogen storage in binary and ternary Mg-based alloys: A comprehensive experimental study

“…Liang et al investigated Mg-LaNi 5 composites and reported 4.1 wt% reversible capacity and good cycling stability once the composite had transformed to its equilibrium state; a mixture of Mg, Mg 2 Ni and LaH 3 [20]. Vijay et al investigated composites of Mg and FeTi and FeTiMn prepared by ball-milling and found that the resulting materials could absorb over 4 wt% hydrogen in a few seconds at 200 C and 30 bar [21]. Similar MgH 2 -5 wt% TiFeMn-5 wt% V and Mg-5 wt% LaNi 5 -5 wt% Ti composite materials were investigated by Fu et al who also performed cycle-life testing.…”