纳米碳管-钙钛石复合催化剂氧电极交换电流密度的测试与分析  

The test and analysis of the exchange current density of the carbon nanotube and perovskite compound oxygen electrodes

作　　者：邵晨[1] 冯辉[1] 卫应亮[1] 申玉江[1] 冯硕[1] 陈玉磊[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002

出　　处：《郑州轻工业学院学报（自然科学版）》2006年第4期8-11,共4页Journal of Zhengzhou University of Light Industry:Natural Science

基　　金：河南省科技攻关项目(0324210004);郑州轻工业学院大学生科技课题资助项目

摘　　要：以纳米碳管与钙钛石制备了复合催化剂氧电极,分析了电极中氧还原的催化机理,利用稳态阴极极化测试法,测试并分析了所制氧电极的交换电流密度.结果表明:复合催化剂催化能力优于单一催化剂;不同种类钙钛石催化能力大小顺序为:La0.8Sr0.2CoO3>La0.6Ca0.4CoO3>La0.6Ni0.4CoO3>La0.8Sr0.2MnO3,正交试验确定的最佳氧电极催化剂配比为:纳米碳管0.1 g,La0.6Sr0.4CoO30.02 g,Na2SO40.1 g,PTFE 0.5 mL,此时,交换电流密度最大,达0.1441 mA/cm2;单因素试验结果显示,复合催化剂中w(La0.8Sr0.2CoO3)=9.09%,w(Na2SO4)=45.45%时电极的阴极极化程度最小.The compound oxygen electrodes with carbon nanotube and perovskite were prepared, the catalysis mechanism of oxygen reduce was analyzed. With the method of cathode polazation curves, the exchange current densities of the oxygen electrodes were tested. The results show that：The compound catalyst ability is superior to singie catalyst. The catalyze ability of different kinds perovskite is La0.8 Sr0.2 CoO3 〉 La0.6 Ca0.4 CoO3 〉 La0.6Ni0.4CoO3 〉 La0.8Sr0.2MnO3. The best proportion of compound catalyzer is 0.1 g carbon nanotube and 0.1 g Na2SO4 and 0.02 g La0.6Sr0.4CoO3 and 0.5 mL PTFE by exchange current density is biggest 0. 1441 mA/cm^2. The experi orthogonal experiment. Under this condition, mental result of single factor shows that：The electric pole cathode polarization is minimum when La0.8Sr0.2CoO3 content is 9.09% and Na2SO4 content is 45.45 %.

关 键 词：交换电流密度 纳米碳管 钙钛石 氧电极 

分 类 号：O646[理学—物理化学] TM911[理学—化学]