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In this study, Ti substrate was coated by three different mixed oxides (SnO 2 -Sb 2 O 5 , RuO 2 -TiO 2 , IrO 2 -Ta 2 O 5 ), then PbO 2 was electrodeposited on them to prepare PbO 2 electrode. The microstructure of the solid solution interlayers and PbO 2 coatings was characterized by scanning electronic microscopy and X-ray diffraction. The results indicated that the above oxides interlayer exited in the form of solid solution and the interlayer covered the Ti substrate largely. Accelerated life test proved that the presence of solid solution interlayer can increase the stability of PbO 2 electrodes in electrolysis. Cyclic voltammogram indicated that the PbO 2 electrode with the solid solution interlayer have more active surface area in sulfuric acid solution. Linear scanning voltammograms showed that the over potentials of the oxygen evolution are decreased with the addition of the solid solution interlayer. Electrochemical impedance spectroscopy showed that the presence of interlayer can increase the electrochemical activity of oxygen evolution reaction and electrical conductivity.

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The lead dioxide electrode (PbO 2 ) with Ti substrate and SnO 2 -Sb 2 O 5 intermediate layer was doped by Fion through the potentiostatic anode co-deposition method. The content of F in the coating can be controlled by adjusting deposition potential. The effect of Fdoping on the composition, surface morphology and electrochemical properties of the PbO 2 electrode was characterized by X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy and electrochemical measurement methods. The results have confirmed that the content of b-PbO 2 increases with increasing that of F, and the doping can make the b-PbO 2 grains become fine and the electrode surface become smooth; the specific surface areas and conductivity increase, and the initial potential of oxygen evolution shifts toward positive direction compared with the free-doped PbO 2 electrode; the oxygen evolution potential increases with the increasing of the Fcontent in the PbO 2 film electrode. The bulk electrolysis result demonstrated that the performances of the F-PbO 2 electrode for anodic oxidation aniline have been improved to some extent.