Preparation and Electrochemical Performance of the Stainless Steel/α-PbO₂-ZrO₂/β-PbO₂-ZrO₂-CNT Composite Anode

A novel stainless steel/α-PbO2-ZrO2/β-PbO2-ZrO2 (30 g l−1)-CNT (10 g l−1) modified by carbon nanotube (CNT) and ZrO2 co-doping was prepared by pulse electrodeposition. The effect of ZrO2 and CNT concentration on the chemical composition, surface morphology, electrocatalytic activity and corrosion resistance of the composite anode materials was studied by anodic polarization curve (LSV), cyclic voltammetry curve (CV), Tafel curve, scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that the surface of the electrode modified by CNT (30 g l−1) and ZrO2 (10 g l−1) has a larger active area and smaller crystallite particles. The formed deposit is flat, dense and crack-free. The electrode has more corrosion resistance. Compared with the stainless steel/α-PbO2-ZrO2/β-PbO2 and the stainless steel/α-PbO2-ZrO2/β-PbO2-ZrO2 (30 g l−1) anode, the stainless steel/α-PbO2-ZrO2/β-PbO2-ZrO2 (30 g l−1)-CNT (10 g l−1) anode has a lower oxygen evolution potential, better electrocatalytic activity, and stronger corrosion resistance.