The electric and electrochemical properties of electrode perovskite La1−xSrxCoO3

The behaviour of perovskites La_1?xSr_xCoO₃ (x = 0.02?0.04) was studied at pH = 5. The oxygen evolution is controlled by the chemical reaction of adsorbed O_ads. The simultaneous presence of strong oxidants increases the concentration of active intermediates and accelerates the evolution of oxygen. La_1?xSr_xCoO₃ is a P-type semiconductor with a narrow gap (0.27–0.07 eV) and high acceptor concentration. Neither photoelectrochemical effect nor Mott-Schottky barrier were observed in electrolytes; however, rectifying effect was observed on contact of metals with low-substituted cobaltate perovskites.