Preparation and Characterization of Titanium Based PbO2 Electrodes Doped with Some Common Elements

摘要:

采用电沉积法制备了4种钛基体PbO2电极，其中3种分别采用Fe、Ni和Ag进行掺杂。利用SEM、XRD、强化寿命测试及线性伏安扫描对所制备4种电极性质进行表征，结果表明：4种电极表面均为四方体形PbO2颗粒；非掺杂电极及Ni掺杂电极的平均颗粒直径非常接近，且要小于Fe掺杂及Ag掺杂电极；Fe掺杂电极的强化测试寿命最长（116 h），这可能是由其致密的表面所导致；Ni掺杂电极的析氧电位为4种电极中最高，并在苯酚降解实验中拥有最高的COD去除效率及平均电流效率，以及最低的能耗值

Abstract:

Four kinds of PbO2 electrodes were prepared by electrochemical deposition and three of them were doped by Fe, Ni and Ag, respectively. The characters of the electrodes were analyzed by SEM, XRD, accelerated life tests, and linear scanning voltammetry. The results show that the electrode surfaces are covered by quadrangular β-PbO2 crystals. The average grain sizes of the undoped PbO2 electrode and Ni-doped PbO2 electrode are similar and smaller than that of the Fe-doped PbO2 and Ag-doped PbO2 electrodes. The Fe-doped PbO2 electrode has the longest accelerated test life due to its dense surface. The LSV tests show that the Ni-doped PbO2 electrode possesses the highest oxygen evolution potential. From the phenol electrolysis, the Ni-doped PbO2 electrode demonstrated the best performance in COD removal efficiency, average current efficiency, and energy consumption