Preparation of Pd/PPy/Foam-Ni Electrode and its Electrocatalytic Hydrodechlorination of Dichlorophenols

Based on mechanism of ECH (Electrocatalytic Hydrogenation),the Pa/PPy/Foam-Ni (Pd/PPY/Ni) prepared by electrical depositing was used as cathode to detoxifythree kinds of dichlorophenol (DCP) and improve their biodegradability. According to the dechloridation ability of electrodes prepared under different conditions, the factors were optimized. The removal efficiency of 2,4-dichlorophenol（2,4-DCP）reaches 64.45% when the supporting electrolyte is p-toluenesulfonic acid and the voltage is 0.6V and polymerizing time is 20mins. Analyzing the photograph from SEM (Scanning Electron Microscope), it shows that PPy (PolyPyrrole) changes depositing properties of Pa on foam-Ni substrate, which increases specific surface area and special ductility so as to benefit Pd to deposite on Ni substrate and improve ECH.