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3 mol/L KOH溶液中,粉末电极电催化还原H2O2的活性最高。电极电势为-0.4 V时,电流密度达到-123 mA/cm2。不同的H2O2浓度下电极性能测试的结果表明,H2O2浓度为0.6 mol/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。
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.
出处
《电源技术》
CAS
CSCD
北大核心
2013年第9期1544-1545,1598,共3页
Chinese Journal of Power Sources
基金
国家自然科学基金资助项目(20973048)
关键词
钙钛矿
阴极催化剂
H2O2电还原
碱性介质
perovskite
cathode catalyst
H2O22 electroreduction
alkaline electrolytes
