(1. 兰州交通大学 环境与市政工程学院，兰州 730070；
2. 寒旱区水资源综合利用教育部工程研究中心，兰州 730070)
摘 要: 采用溶胶凝胶法在400 ℃条件下制备不同Ce含量的Ti/IrO2+MnO2+CeO2电极，并运用SEM、循环伏安、析氧极化曲线、交流阻抗实验分析Ce掺杂量对Ti/IrO2+MnO2+CeO2电极的微观结构和电化学性能的影响。结果表明：各涂层表面都是由带有裂纹的低洼区和致密的高隆区组成，当涂层中Ce含量为10%时，可以明显改善涂层电极的表面形貌与结构，增加比表面积。在电化学性能方面，相比不含Ce的IrMn电极，适量CeO2可以提高Ti/IrO2+MnO2+CeO2电极的电催化性能，并在10%的Ce含量时，Ti/IrO2+MnO2+CeO2电极的电化学活性达到最大。
关键字: Ti/IrO2+MnO2+CeO2；溶胶凝胶法；钛阳极；电化学活性
（1. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
2. Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou 730070, China）
Abstract:Ti/IrO2+MnO2+CeO2 electrodes with different Ce contents were prepared by sol-gel method at 400 ℃. The effects of the Ce content to Ti/IrO2+MnO2+CeO2 electrode on microstructure and electrochemical properties was analyzed by SEM, cyclic voltammetry, oxygen evolution polarization curve and AC impedance test. The results show that the surface of each coating is composed of cracked low-lying areas and dense high-long areas, when the content of Ce in the coating is 10%, the surface morphology and structure of the coated electrode can be significantly improved, and the specific surface area increases. In terms of electrochemical performance, moderate CeO2 can increase the electro-catalytic performance of Ti/IrO2+MnO2+CeO2 electrode compared to the Ce-free IrMn electrode, and the Ti/IrO2+MnO2+CeO2 electrode with the Ce content of 10% has the highest electrochemical activity.
Key words: Ti/IrO2+MnO2+CeO2; sol-gel method; titanium anode; electrochemical activity
