Magnesium Composites with Additions of Oxygen-Stabilized η-Zr₄Fe₂O_0,5 for Effective Hydrogen Accumulation

Abstract

The advantages of reactive ball milling for preparation of new efficient Mg-based hydrogen storage materials are discussed. Mg-based nanocomposites were synthesized with additions of the η-Zr₄Fe₂O_0,5 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 compound composites was observed. It was shown that fourfold increase of the reaction rate during mechanochemical synthesis of MgH₂ and decrease of hydrogen desorption temperature by 80 °C were caused by catalytic additions.