Study on composite coating of α-PbO2-Co3O4-CeO2 on stainless steel

摘要

The anodic coating of α-PbO2-Co3O4-CeO2 on stainless steel was prepared by DC deposition in this paper.The effect of different conditions and solid particles on the binding,appearance and deposition rate of the composite was researched.The optimum conditions for electrode preparations were obtained as follows:the current density 1.5 A/dm2,electroplating time 2 h,temperature 40 °C,Co3O4 30 g/L and CeO2 15 g/L.On this condition,the α-PbO2-5.43wt％ Co3O4-4.64wt％CeO2 composite coating can be obtained.SEM and linear sweep voltammeter were used for the analysis of the surface structure and oxygen evolution potential.The results showed that the doping particles can not only improve electrode surface area but also reduce the granularity of pellet.The α-PbO2-5.43wt％Co3O4-4.64wt％CeO2 electrode has a lower oxygen evolution potential and higher electrocatalytic activity than pure α-PbO2 electrode.