Hydrogen uptake in Mg thin film alloys

Abstract

The work is focused on the study of the possibility to reduce the binding energy of hydride formation by alloying metal magnesium with palladium and chromium. Hydrogen uptake in Mg-Pd and Mg-Cr films was investigated by in-situ resistance measurements. Experimental data were used to calculate the dependence of the p-ΔR-T and isotherms showing the enthalpy and entropy change were drawn. The data were then compared with bulk values for MgH2 and MgPd0.6. As a result, the conclusion is made that the enthalpy change or binding energy was reduced from -0.77 eV/H2 down to -0.65 ÷-0.5 eV/H2.