采用热分解法制备了不同SnO2含量(Sn摩尔分数为7.7%、14.3%和20.0%)的Ti基IrO2-Ta2O5-SnO2涂层阳极(Ir与Ta的摩尔比为2∶1)，通过循环伏安法、极化曲线测试和交流阻抗谱分析了涂层的电催化活性，采用强化寿命试验测试了阳极的耐腐蚀性能。结果表明，掺杂 SnO2后，Ti 基 IrO2-Ta2O5涂层阳极的催化活性表面积增大，但是析氧电位及涂层的总电阻也增大，耐腐蚀性能降低。SnO2含量为7.7%时综合电催化性能最佳。
The Ti-based IrO2–Ta2O5–SnO2 coated anodes (molar ratio of Ir to Ta equals to 2:1) with different SnO2 contents (molar fractions of Sn are 7.7%, 14.3%, and 20.0%) were prepared by thermal decomposition method. The electrocatalytic activity of the coatings were analyzed by cyclic voltammetry, polarization curve measurement, and electrochemical AC impedance spectroscopy. The corrosion resistance of the anodes were examined by accelerated lifetime test. The results indicated that the catalytically active surface area of the Ti-based IrO2–Ta2O5 coating is increased after doping SnO2, while the oxygen evolution potential and total resistance are increased as well, and the corrosion resistance is decreased. The comprehensive electrocatalytic property is the optimal when the content of SnO2 is 7.7%.
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