Effect of Nb2O5 content on hydrogen reaction kinetics of Mg

Effects of BaRuO3 addition on hydrogen desorption in MgH2

“…A number of techniques has been applied to improve the ab/desorption kinetics of MgH 2 , for example, ball-milling [9][10][11] with different additives e.g., transition metals (TM) [12][13][14] and transition metal oxides (TMO) [15][16][17][18][19][20]. The addition of niobia (Nb 2 O 5 ), in particular, has demonstrated an increase of reactivity in MgH 2 with respect to H 2 uptake/release [9,[21][22][23][24][25]. Recently, the interaction of hydrogen with MgH 2 in presence of ternary Mg-Nb oxides has been studied [26], suggesting a prominent effect for the system Mg 3 Nb 6 O 11 .…”

Correlation between kinetics and chemical bonding state of catalyst surface in catalyzed magnesium hydride

“…Many kinds of hydrogen absorbing materials have been studied in order to store hydrogen, such as sodium alanates [1], [2], metal nitrides [3], [4], as well as MgH 2 [5], [6], which is one candidate because of its high hydrogen capacity (7.6 mass%).…”

Small-angle scattering investigations of magnesium hydride used as a hydrogen storage material

“…One of the most interesting materials is magnesium hydride, which exhibits a high hydrogen storage capacity of 7.6 wt%. Absorption and desorption kinetics of hydrogen on MgH 2 are well known (Barkhordarian et al, 2003(Barkhordarian et al, , 2004Oelerich et al, 2001) as well as cycling and thermal stability (Huhn et al, 2005). The sorption properties are distinctly enhanced by high-energy ball milling and the addition of metal oxide additives, like Fe 2 O 3 , Nb 2 O 5 , TiO 2 and Cr 2 O 3 .…”