In this study titanium dioxide nanotube arrays(TNTs) were prepared by an anodic oxidation process.And then the palladium nanoparticles supported on them (Pd-TiO2/Ti) were prepared by electrophoretic deposition method.The loading of palladium was controlled by the power consumption.In order to evaluate the effect of crystal form of titanium dioxide nanotube on the performance of the as-prepared catalyst,a post-calcination treatment was carried out.The morphology and structure of the TNTs and the Pd-TiO2/Ti were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD),respectively.Electrocatalytic activity of the Pd-TiO2/Ti catalyst was evaluated in terms of the oxidation of ethanol in 1M ethanol + 1M KOH aqueous solution by cyclic voltammetry technique.The XRD and SEM results both showed that the presence of palladium nanoparticales on nanotubular TiO2.The electrocatalytic activity of the Pd-TiO2/Ti catalyst enhanced during the electro-oxidation of ethanol when annealed to anatase.The large specific surface area,high pore volume,and optimal tube length would be important factors to achieve the good performance of Pd-TiO2/Ti catalyst.Moreover,the loading of Pd also had an optimal value.