Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

摘要: Because of its low density, storage hydrogen in the gaseous and liquids states possess technical economic challenges. One practical solution for utilizing vehicles with proton-exchange fuel cells membranes is storing metal hydrides. Magnesium hydride (MgH2) remains best material due to high capacity cost production. Due activation energy poor sorption/desorption kinetics at moderate temperatures, pure form MgH2 usually mechanically treated by high-energy ball mills catalyzed different types catalysts. These steps are necessary destabilizing enhance behaviors. In present work, we used a small mole fractions (5 wt.%) metallic glassy Zr70Ni20Pd10 powders as new enhancement agent improve hydrogenation/dehydrogenation behaviors MgH2. This short-range ordered led lower decomposition temperature about 121 °C 51 kJ/mol, respectively. Complete processes were successfully achieved charge/discharge 6 wt.%H2 100 °C/200 °C within 1.18 min/3.8 min, addition, this nanocomposite system shows performance achieving continuous 100 charging/discharging cycles without degradation.