论文部分内容阅读
本文利用电沉积制得ZrO2掺杂铌基二氧化铅电极,通过扫描电镜(SEM)和X射线衍射(XRD)观察表征了Nb/ZrO2+PbO2电极表面形貌特征及组成.用线性伏安曲线、电化学交流阻抗和循环伏安曲线测试了Nb/ZrO2+PbO2电极电化学性能,及其甲基橙(MO)的降解电催化效果.结果表明,ZrO2掺杂使Nb/PbO2电极表面更致密、粗糙,结晶尺寸更小,增大了电极比表面积,提高了电极电催化活性.Nb/ZrO2+PbO2电极活性层主要由β-PbO2和少量的α-PbO2以及部分ZrO2共沉积而成.有较高的析氧电位、吸附电容和较低的电荷转移电阻,其甲基橙(MO)降解电催化活性更佳,降解过程受扩散控制.
In this paper, ZrO2-doped niobium-based lead dioxide electrode was prepared by electrodeposition, and the surface morphology and composition of Nb / ZrO2 + PbO2 electrode were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) , Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to test the electrochemical performance of Nb / ZrO2 + PbO2 electrode and the degradation electrocatalytic activity of methyl orange (MO). The results show that the surface of Nb / , Coarse and the size of crystal is smaller, which increases the specific surface area of the electrode and enhances the electrocatalytic activity of the electrode.Nb / ZrO2 + PbO2 electrode active layer is mainly composed of β-PbO2 and a small amount of α-PbO2 and some ZrO2 co-deposition Higher oxygen evolution potentials, adsorption capacities and lower charge transfer resistances led to better electrocatalytic activity of methyl orange (MO) degradation and controlled diffusion process.