Abstract
La0.75Sr0.25Mn1-xMgxO3-δ (LSMMg) perovskite material was produced at x=0-0.8 by solution combustion method using tartaric acid as chelating agent and fuel. Perovskite material was obtained after calcination of gels in air at temperature of 800°C for 3hours. X-ray diffraction (XRD) analysis confirmed the formation of perovskite phase for all x=0-0.8. The XRD line broadening analysis showed that particle size of LSM decreased from 100nm to 28-50nm by doping of Mg from x=0-0.8. The electrochemical impedance spectroscopy of sintered pellets of LSMMg produced at x = 0-0.8 in 0.5M KOH solution represented the increased adsorption of hydroxyl ions in perovskite structure. The results suggest that LSMMg (x=0.5) perovksite is promising anode material for alkaline fuel cells as it can promote oxygen evolution reaction.
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