Synthesis and electrochemical performance of multicomponent oxide materials toward oxygen reduction reaction

Abstract

Low cost and highly active electrocatalysts for the oxygen reduction reaction (ORR) are necessary for the development of fuel cells and metal air batteries. Currently, Pt based electrodes have the best catalytic performance but due to is high cost its employment on a significant scale is limmited. Perovskite materials would be a good alternative because of is abundant supply, envronmental benignity, electronic structure, ionic conductivity and redox behavior. Therefore, the aim of this work is synthesis and characterzation of Lanthanum cobalt oxide (LaCoO3) powders doped with Manganese (Mn) - LMCO or Strontium (Sr) - LSCO, as promissing candidates for energy storage and conversion devices. Ultrasonic spray pyrolisis (USP) was used to successfully synthsize spherical sub-microm-m-szed of Lai0.6Sr0.4CoO3 and La0.6Mn0.4CoO3 perovskite type materials. Detailed microscopic analysis (SEM-EDX, TEM, XRD) as well as electrochemical characterization by CV, LSV and EIS technique has been conducted.