Activation of oxygen reaction by praseodymium oxide film on platinum electrode in contact with YSZ electrolyte

The method of impedancemetry is used to study electrochemical activity of platinum electrodes in contact with the solid electrolyte of YSZ (ZrO2+10 mol % Y₂O₃). Electrodes are activated by small additives of pradeodymium oxide PrO _x (0.1–0.3 mg/cm²) by their impregnation by praseodymium nitrate solution with the further thermal treatment at 850°C and are studied in the cases when PrO _x forms a film on the electrolyte and when no activator film is formed. The effect of the number of electrode activations on the electrochemical activity of platinum electrodes is studied.