Abstract - Pracownia Elektrochemicznych Źródeł Energii

Thin layers of Pd and its alloys with Pt, Au and Rh were prepared by electrodeposition on Au substrate. Hydrogen electrosorption in the obtained electrodes was studied in 0.5 H2SO4 aq using cyclic voltammetry and chronoamperometry. The influence of alloying process on selected thermodynamic (the amount of absorbed hydrogen, the stability of the beta-phase, the extent of absorption/desorption hysteresis) and kinetic aspects (the rate of hydrogen absorption and absorbed hydrogen oxidation) of hydrogen absorption and desorption was examined. It was found that the addition of the non-absorbing elements to Pd results in faster kinetics of hydorgen electrosorption process and smaller absorption/desorption hysteresis.