Synthèse et étude du comportement électrochimique de la pérovskite La0,5Sr0,5MnO3 et des doubles pérovskites Sr2BMoO6 (B = Fe, Co) vis-à-vis de la réduction de l’oxygène

Abstract

This work focuses on the synthesis of the simple perovskite La0,5Sr0,5MnO3 and double perovskites Sr2Fe1-xCoxMoO6 (x = 0; 0,25; 0,50; 0,75 and 1) using solid state and citrate methods and the study of their electrochemical behavior for their application as oxygen electrode material in the fuel cells, in water electrolyzers and in oxygen sensors. The prepared powders were characterized by X-ray diffraction, IR spectroscopy and electrical conductivity. Their morphology was examined by scanning electron microscopy. The study of their electrochemical behavior towards oxygen reduction reaction shows that both La0,5Sr0,5MnO3/C and Sr2CoMoO6/C electrodes have a good electrocatalytic activity.