中文摘要：

以溶胶-凝胶法制备La1-xSrxCoO3电极材料，通过循环伏安和恒流充放电等方法研究了La1-xSrxCoO3催化H2O2电还原的性能。结果表明当X=0．4时，在3mol／LKOH溶液中。粉末电极电催化还原H2O2的活性最高。电极电势为-0．4V时。电流密度达到-123mA／cm2。不同的H2O2浓度下电极性能测试的结果表明，H2O2浓度为0．6mol／L时，电流密度最大。计时电流法测试表明La0.4Sr0.6CoO3粉末电极在碱性溶液中稳定性良好。

英文摘要：

La1-xSrxCoO3 powder electrodes were synthesized by a sol-gel method, The electrochemical performance was studied by cyclic voltammetry （CV） and chronopotentiometry（CP）. The results reveals that La1-xSrxCoO3 with x= 0.4 power electrodes exhibits highest activity for electrocatalytic reduction of H2O2 in 3 mol/L KOH solution. The current density reaches 123 mNcm2 when the electrode potential is -0.4 V. The electrode performance of different H202 concentration indicates that the current density is at the most with the H2O2 concentration of 0.6 mol/L. Chronoamperometry test shows that La0.6Sr0.4CoO3powder electrode has a better stability in alkaline solution.