交流阻抗法研究苯酚在Sb^(3+),Ce^(3+)掺杂SnO_2/C/Ti系列电极上的电化学行为

Electrochemical Behavior of Phenol on Sb^(3+),Ce^(3+)-Doped SnO_2/C/Ti Anodes by AC Impedance Method

采用溶胶-凝胶法合成Sb3+,Ce3+掺杂SnO2胶体前驱体,分别经XC-72R碳黑吸附后制备出一系列碳载氧化物复合电催化剂.利用电化学交流阻抗法(EIS)测试Sb3+,Ce3+掺杂SnO2/C/Ti系列电极的交流阻抗值及随电位和不同苯酚浓度的变化情况.实验结果表明,随着施加在工作电极的电位升高,苯酚氧化的阻力减小;苯酚浓度越大,钝化膜越厚,苯酚氧化的阻力越大.

Carbon supported oxide composite electrocatalysts were prepared through the absorption of Vulcan XC-72R carbon on Sb3＋,Ce3＋-doped SnO2 precursors which were obtained by sol-gel method.The changes of impedance values of Sb3＋ and Ce3＋-doped SnO2/C electrodes under the different potential and Phenol concentration were measured by electrochemical impedance spectroscopy（EIS）.The results indicate that the reaction resistance becomes lower with the increasing voltage and has higher impedance with the increasing concentrations.