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用电沉积法制备表面活性剂聚乙二醇(PEG)和溴化十六烷基吡啶(CPB)复配改性PbO_2电极,用SEM、XRD、电化学阻抗谱(EIS)和线性极化扫描(VA)等方法对其微结构和电化学性能进行了表征。结果表明,PEG/CPB复配改性在改善PbO_2镀层微结构中产生协同增效作用,使电极表面颗粒进一步细化均匀;复配改性电极明显提升了苯酚的催化降解活性,在2.5 h内对100 mg·L~(-1)苯酚溶液的降解率为98.7%。PEG/CPB复配改性电极电催化活性的提升与电极的活性表面积增大、电化学反应电阻减小和析氧电位的提高有关。
Electrodeposition method was used to prepare PbO_2 electrode modified with polyethylene glycol (PEG) and cetyl pyridinium bromide (CPB). SEM, XRD, EIS and linear polarization scanning (VA) and other methods of its microstructure and electrochemical properties were characterized. The results showed that PEG / CPB compound modification could improve the synergism of PbO_2 microstructure and further refine the surface of the electrode. The modified electrode significantly enhanced the catalytic activity of phenol. Within 2.5 h, The degradation rate of 100 mg · L -1 phenol solution was 98.7%. The enhancement of the electrocatalytic activity of PEG / CPB composite modified electrode is related to the increase of the active surface area of the electrode and the decrease of the electrochemical reaction resistance and the increase of oxygen evolution potential.