THE INFLUENCE OF CATALYST-SUPPORTING METHODS ON ELECTROCHEMICAL ACTIVITY AND THE RESULTANT STABILITY OF AIR ELECTRODES ACTIVATED WITH IRON PHTHALOCYANINE

To improve the performance of air electrodes, the dependence of iron phthalocyanine (FePc) catalytic effects on preparation methods was examined. The methods used were mixture (Electrode 1), impregnation (Electrode 2) and direct synthesis (Electrode 3). Electrodes 2 and 3 showed higher potentials during cathodic polarization up to 10 mA cm** minus **2 than Electrode 1. The rate of chemical destruction of H//2O//2 decreased in the order Electrodes 3 greater than Electrode 2 greater than Electrode 1. Electrode 3 showed the smallest potential drop for a discharge at 10 mA cm** minus **2, 0. 09 V after 50 h. However, the potential of Electrode 2 decreased with discharge, becoming 0. 09 V lower than that of Electrode 3 after a 50 h discharge at 10 mA cm** minus **2. Once the potential drop occurred, the potential was not recovered by resting or by drying the electrode.