Supercritical fluid chemical deposition of Pd nanoparticles on magnesium–scandium alloy for hydrogen storage

摘要: Abstract The deposition of Pd nanoparticles on the binary compound Mg 0.65 Sc 0.35 using Supercritical Fluid Chemical Deposition (SFCD) method was performed. There, SFCD operating parameters (co-solvent, temperature, CO 2 and hydrogen pressure, reaction time) have been optimized to obtain homogeneous (around 10 nm). hydrogenation properties Pd@Mg material were determined compared those 0.024 . latter forms at 300 °C 1 MPa H a hydride that crystallizes in fluorite structure, absorbs reversibly 1.5 wt.% exhibits fast kinetics. In contrast, decomposes into ScH MgH during absorption under same conditions. However, reversible sorption reaches 3.3 wt.% while keeping good possible roles hydrogen-induced alloy decomposition are discussed.