Hydrogen storage property of sandwiched magnesium hydride nanoparticle thin film

摘要

Hydrogen sorption property of magnesium (Mg) in the form of sandwiched Pd/Mg/Pd films is investigated. Pulsed laser deposition method was applied to deposit the samples consisting of films of nanoparticles. The enthalpy of formation of MgH_2 was found to be -68 kJ/ mol H_2 for films with nanoparticle size on the order of 50 nm, which is smaller than the value for bulk MgH_2 and may be explained by the concept of excess volume.