采用溶胶-凝胶法合成Sb、Ce共掺杂SnO2/C/Ti电极,经XC-72R炭黑吸附后得到钛基炭载金属氧化物SnO2-Sb (2.5％(质量分数,下同))-Ce(2.5％)/C/Ti电极,利用电化学交流阻抗法(EIS)测试电极的交流阻抗值随电位和不同浓度苯酚的变化情况.结果表明,在不同电位(0.10、0.95、1.01 V)时,SnO2-Sb(2.5％)-Ce(2.5 ％)/C/Ti电极的膜电阻、电化学电阻、总电阻和苯酚氧化阻力随着电位的增加而减小;此外,在恒电位(0.95 V)、不同质量浓度(100、200、300mg/L)苯酚溶液的条件下,电极的膜电阻、电化学电阻、总电阻和苯酚氧化阻力随着苯酚浓度的增加而增大.电极在反应过程中表现良好的活性,对苯酚的催化氧化较彻底.%Carbon supported oxide composite electrocatalysts SnO2-Sb(2. 5%)-Ce(2. 5%)/C/Ti were prepared through the absorption of XC-72 carbon on Sb,Ce co-doped SnO2/C/Ti which were obtained by sol-gel method. The changes of impedance values of Sb,Ce co-doped SnO2/C/Ti electrodes under the different potential and phenol concentration were measured by electrochemical impedance spectroscopy (EIS). The results shows that under different potentials (0. 10,0. 95,1. 01 V) ,the membrane resistance,electrochemistry resistance,total resistance and the resistance of phenol oxidizing of SnO2-Sb(2. 5%)-Ce(2. 5%)/C/Ti electrode decreases as potential increases. Moreover, under the constant potentials (0. 95 V),the membrane resistance,electrochemistry resistance,total resistance and the resistance of phenol oxidizing of SnO2-Sb(2. 5%)-Ce(2. 5%)/C/Ti electrode increases as the concentration of phenol increases. During the reaction,electrodes show a high activity to electrocatalytic oxidation of phenol.
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