One-Pot Facile Synthesis of La0.5Sr0.5CoO3/C by Sol-Microwave Method and Its Electrocatalytic Activity for Oxygen Evolution Reaction

The La 0.5 Sr 0.5 CoO 3 /C was synthesized by sol-microwave process, which has globular particle with size range of 15–25 nm and distributed evenly. The electrode prepared with this catalyst has a current density of 141 mA·cm −2 at 0.7 V (vs. Hg/HgO) in an alkaline medium (6 mol·L −1 KOH). La 0.5 Sr 0.5 CoO 3 /C has excellent catalytic performance for oxygen evolution, which is superior to RuO 2 /C catalyst and can replace noble metal catalytic materials. Graphical Abstract The polarization curves of oxygen evolution for La 0.5 Sr 0.5 CoO 3 /C electrode and RuO 2 (20%)/C electrode are shown. At 0.7 V (vs. Hg/HgO), the oxygen evolution current density is 141 and 135 mA·cm −2 , respectively. The results show that perovskite-type oxide La 0.5 Sr 0.5 CoO 3 /C prepared by sol-microwave method has better catalytic performance than RuO 2 (20%)/C.