Nanostructured Ti/IrO2-Ta2O5-SnO2 oxide anodes with different Sn content were prepared by Pechini method. The surface morphology and microstructure were analyzed by SEM, EDX and XRD. The electrochemical activity and stability were investigated by electrochemical testing including oxygen evolving potential measurement, cyclic voltammetry, and accelerated life test. The results indicate that the oxide coatings are composed of (IrSn)O2 solid solution and amorphous Ta2O5, with the composition close to the nominal one. With the increase of Sn content, more microcracks appear on the anode surface. The addition of Sn into the IrO2-Ta2O5-SnO2 oxide coating increases the oxygen evolving potential and lowers the electrochemical stability