Synthesis and hydrogen sorption of MgH2 composites with TiFe and Ti3FMgH2 additives

Hydrides of magnesium composites with additions of TiFe intermetalide and Ti3Fe3O suboxide was synthesized by mechanical grinding in hydrogen. It was found that the rate of mechanochemical hydrogenation of magnesium in the presence of these additives doubles, and the temperature of hydrogen desorption decreases by 100–150°C. With the addition of graphite, the particle size of the composites decreases, and the rate of forma­tion of mag­nesium hydride during grinding and in subsequent cycles of hydrogen sorption-desorption increases. The properties of composites depending on different initial particle sizes and magnesium purity were investigated. Composites based on magnesium shavings were synthesized using a simplified method.