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为了提升镍阳极析氧活性,降低氧析出过电位,通过电镀技术在室温条件下制备了不同电流密度的二氧化铅镀层阳极。采用扫描电镜和X射线衍射对镀层的表面形貌和晶体结构进行了表征。运用循环伏安(CV)和线性扫描(LSV)技术分析比较了不同电流密度条件下的二氧化铅镀层的化学性质。并测试了所制阳极的镀锌槽电压的大小。研究表明,电流密度为20m A/cm2时,镀PbO_2层效果最好,β-PbO_2电极可促进阳极析氧反应的动力学过程,降低镍基阳极的析氧电位,β-PbO_2电极可通过降低析氧电位来降低电沉积金属锌的槽电压。
In order to enhance the oxygen evolution activity of nickel anodes and reduce the over-potential of oxygen evolution, lead dioxide coated anodes with different current densities were prepared by plating at room temperature. The surface morphology and crystal structure of the coating were characterized by scanning electron microscopy and X-ray diffraction. The chemical properties of lead dioxide coatings at different current densities were analyzed by cyclic voltammetry (CV) and linear sweep (LSV) techniques. The size of the anode zinc plating bath was also tested. The results show that the PbO_2 layer is best when the current density is 20m A / cm2 and the β-PbO_2 electrode can promote the kinetics of anodic oxygen evolution reaction, which can reduce the oxygen evolution potential of the nickel-based anode. Oxygen evolution potential to reduce electrodeposition of zinc metal tank voltage.