The La0.5Sr0.5CoO3/C was synthesized by sol-microwave process, which has globular particle with size range of 15-25nm and distributed evenly. The electrode prepared with this catalyst has a current density of 141 mAcm(-2) at 0.7V (vs. Hg/HgO) in an alkaline medium (6 molL(-1) KOH). La0.5Sr0.5CoO3/C has excellent catalytic performance for oxygen evolution, which is superior to RuO2/C catalyst and can replace noble metal catalytic materials.Graphical AbstractThe polarization curves of oxygen evolution for La0.5Sr0.5CoO3/C electrode and RuO2 (20%)/C electrode are shown. At 0.7V (vs. Hg/HgO), the oxygen evolution current density is 141 and 135 mAcm(-2), respectively. The results show that perovskite-type oxide La0.5Sr0.5CoO3/C prepared by sol-microwave method has better catalytic performance than RuO2(20%)/C. [GRAPHICS] .