PPY掺杂离子对电催化脱氯Pd/PPY/Ni电极的影响

Effects of dopant ions of polypyrrole on Pd/PPY/Ni composite electrode for electrocatalytic hydrodechlorination

摘要:

为制备高效稳定的用于电催化去除氯代有机物的电极,采用扫描电子显微镜和电催化脱氯实验考察不同聚吡咯掺杂离子对Pd/PPY/Ni复合电极的形貌和电催化加氢脱氯性能的影响．将制备的电极在强吸附性阴离子存在情况下,考察其电催化性能的变化．结果表明,掺杂离子对复合电极的形貌和电催化性能有显著的影响,对甲苯磺酸掺杂的聚吡咯对应的Pd/PPY(PTS)/Ni电极有最高的电催化加氢脱氯效率(高达91.1％),高氯酸钠掺杂的聚吡咯对应的电极电催化性能最差．电催化体系中强吸附离子(ClO₄-, Cl-)的存在对电极性能有微弱影响,表明电极具有良好的稳定性,可高效去除水中的氯酚类氯代有机物．

Abstract:

Electrocatalytic hydrodechlorination (ECH) is an efficient method for dechlorination of chlorinated organic pollutants. Preparation of working electrode used in ECH is of great importance. Dopant ions doped in polypyrrole had effects on Pd/PPY/Ni composite electrode. The influences of dopant ions on morphology and ECH performance of composite electrode were investigated. The removal rates of 2,4-DCP for Pd/PPY(PTS)/Ni electrode reached 91.1％, higher than others, especially than that of Pd/PPY(NaClO₄)/Ni. The effects of strongly adsorbed anions (ClO₄-, Cl-) in catholyte on electrochemical hydrodechlorination activity of the composite electrode via removal of 2,4-DCP were studied. 