The best H2 storage oxides such as Fe3O4, GeO2, MoO2, SnO2, ZnO, and WO3 are supported with Al2O3, TiO2, Cr2O3, MnO, and MgO. 118 Ti4M2Oy mixed oxides (Ti4Fe2O, Ti4Ni2O) have demonstrated good hydrogen storage properties at room-temperature. 119 Also hybrid ceramics, such as NiCo2O4/TiO2, are an efficient and novel hydrogen storage material. Metal oxides, especially transition metal oxides, are universally used as hydrogenation and/or dehydrogenation catalysts. For example, TiO2 supported on multi-walled carbon nanotubes improves both hydrogenation and dehydrogenation of a Mg-Ni alloy (absorbs 5.60 wt% H2 at 373 K and releases 6.08 wt% H2 at 553 K). The addition of TiO2 to a Mg80Ni10La7Ce3 alloy significantly improves its dehydrogenation. Metal oxide nanoparticles produced by ball milling have a superior effect on the hydrogenation and/or dehydrogenation of MgH2. Thus, Ni@TiO2 core-shell nanoparticles significantly improve hydrogen desorption from MgH2. 123 Nb2O5 milled with MgH2 catalyzes the hydrogenation of MgH2. The catalytic effect of a VNbO5 ternary oxide on MgH2 dehydrogenation is also remarkable. Recently solid oxides with ABO3 perovskite structures became key substances for enhancing hydrogen storage properties. It was shown that porous NiTiO3 and CoTiO3 nanorods can decrease the dehydrogenation temperature of MgH2 and provide faster hydrogen desorption (Tdes = 261.5•C and Tdes = 298•C for NiTiO3 and CoTiO3, respectively). Other mixed oxides such as NiMoO4 and CoMoO4 nanorods similarly enhance the non-isothermal and the isothermal desorption performance of magnesium hydride. 128