Magnesium Composites with Additions of Oxygen-Stabilized η-Zr4Fe2O0.5 for Effective Hydrogen Accumulation

The advantages of reactive ball grinding for preparation of new efficient Mg-based hydrogen storage materials are discussed. Magnesium-based nanocomposites were synthesized with additions of η-Zr4Fe2O0.5 intermetallic compound, which is characterized by enhanced resistance to disproportionation in hydrogen and can prolong the cyclic life of materials. The improvement of hydrogen absorption parameters for Mg–intermetallic composites was observed. It was shown that fourfold increase in the reaction rate during mechanochemical synthesis of MgH2 and decrease in hydrogen desorption temperature by 80°C were induced by catalytic additions.