Electrochemical Properties of Low Bi Doped La0.60Dy0.10Sr0.30Mn(1-x)BixO3 Perovskite Magneticaloric Materials

Developing low-cost, high-durability and high-performance electrocatalytic materials are needed for hydrogen/oxygen evolution (HER/OER) oxygen reduction reactions (ORR) which crucial steps regenerative fuel cells. Although Pt-based, RuO2 IrO2 widely used these purposes, other alternative required with desired properties. In this regard, we studied the electrochemical properties of lanthanum-based perovskites were synthesized by sol-gel method. We investigated addition 10% Dy 30% Sr into A site a small amount Bi (x: 0, 0.03 0.1) added B La0.60Dy0.10Sr0.30Mn(1-x)BixO3 on HER, OER ORR in 1 M KOH alkaline media at room temperature. While 0% 3% exhibited poor HER activities, effect structure enhanced activities lowering onset potential from -1.389 V to -1.036 (vs. Ag/AgCl) increasing specific current density -1.4 -13.3 mA cm-2 -121.8 cm-2. Similarly, activity was also improved due found be 0.758 88.3 cm-2, respectively. The large Tafel slopes indicate that mechanism is possible but slow rate. resulted very high resistance 19.3 kΩ it reduced value 3.5 ion conducting paths developed catalysts.