Electrochemical dechlorination of chloroform in aqueous solution on glassy carbon electrode modified with palladium-nickel /polymeric pyrrole electrodes

摘要

The study of the electrocatalytic activity of Pd-Ni/PPy/GC eletrodes for the electrocatalytic reductive dechlorination of chloroform was carried out in aqueous solution, The Pd-Ni microparticles were uniformly dispersed on a polypyrrole (PPy) film which was previously electrodeposited on the glassy carbon(GC) electrode. The Pd/Ni/PPy/GC electrode was characterized by scanning electron microscopy (SEM) and cyclic voltammetry (CV). The results indicate that PPy film formed on electrodes made the distribution of Pd-Ni microparticles more dispersive. Electrocatalytic reductive of chloroform was performed in a two-compartment cell separated by cation-exchange membrane. It is found that the removal efficiency of chloroform and current efficiency on Pd/Ni/PPy/GC electrode could be up to 35.1% and 31.49% at dechlorination current of 0.1 mA and dechlorination time of 180 min.