Electrochemical reactivity of magnesium hydride toward lithium: New synthesis route of nano-particles suitable for hydrogen storage

Electrochemical conversion reaction of MgH2 with Li ion enables the production of in-situ nanometric Mg and MgH2 particles so-called (nano-Mg) INSITU and [(nano-MgH2)INSITU] showing interesting hydrogen sorption properties with hydrogen absorption at 100 °C under 10 bars of hydrogen pressure (PH2) and desorption at 200 °C under primary vacuum, respectively. Differential Scanning Calorimetry (DSC) measurements of MgH2 electrochemically prepared confirmed a decrease in the desorption temperature from 416 °C to 295 °C and in the heat of formation from −74 kJ mole mol−1 (H2)−1 to −56 kJ mol−1 (H2)−1 for commercial (particle size diameter: 10 μm-100 μm) and as prepared MgH2 hydride (particle size: 10 nm-40 nm), respectively.