A novel Ti/PbO₂ electrode was synthesized through electro-codeposition technology by using dodecyl trimethyl ammonium chloride (DTAC) as an additive.Its characteristics were examined by scanning electron microscopy,X-ray diffraction,cyclic voltammetry,electrochemical impedance spectroscopy,X-ray photoelectron spectroscopy and accelerated life test etc.Electro-catalytic oxidation experiments were carried out to evaluate the effect of DTAC on the electorde's electrochemical activity.Acid red G (ARG,C₁₈H₁₃N₃Na₂O₈S₂,CAS number:3734-67-6) was chosen as the model contaminant due to its extensive industrial usage.After DTAC modification,the predominant phase of the electrode was still pure β-PbO₂.However,DTAC could refine the electrode surface leading to a high electrode specific surface area and oxygen evolution potential (OEP,1.886V) and a low electrode film impedance (55.7 ?/cm²).The ARG electrocatalytic degradation and accelerated life tests revealed that the electrocatalytic ability and stability of the modified electrode were much higher compared to that of PbO₂electrode.Among these novel electrodes,the PbO₂-DTAC (0.5) exhibited the highest electrocatalytic ability for ARG degradation with a decolorization percentage of 86.8% within 60 min.Moreover,its stability was the highest with a long accelerated service life of 232.5 h,which was more than 2 times longer than that of PbO₂ electrode (96 h).