[Introduction]The electrochemical performance of Ti-based MnO2 coated electrode for electrodeposition needs to be improved.[Method]Ti-based MnO2 electrodes doped with different amounts of Ce (Ti/SnO2/MnO2+CeO2) were prepared with SnO2 as intermediate layer by thermal decomposition at 450 ℃. The morphology and electrochemical behavior of the active layer of the electrodes were analyzed by field-emission scanning electron microscopy and electrochemical methods such as cyclic voltammetry,electrochemical impedance spectroscopy,oxygen evolution polarization curve measurement,and accelerated life test.[Result]The doping of Ce significantly changed the morphology of the active layer and formed a uniform and compact structure on the electrode surface which were composed of a large number of spherical grains. The electrode doped with 4％ of Ce had the smoothest active surface layer,a voltammetric charge about 6 times that of the undoped electrode,and an accelerated lifetime about 1.8 times that of the undoped one.[Conclusion]Appropriate doping of cerium can improve the electrocatalytic activity of Ti-based MnO2 coated electrode and prolong its service life.
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