The Electroreductive Dechlorination Reaction of 2,3-Dichlorophenol on Pd/Ag/Cu

Pd/Ag/Cu electrode was successfully prepared on Ag dendrites with Cu substrate (Ag/Cu) by galvanic replacement reactions, and was characterized by scanning electron microscopy, X-ray diffraction and transmission electron microscopy. The electroreductive dechlorination reaction of 2,3-dichlorophenol on Pd/Ag/Cu electrode was investigated by cyclic voltammetry and in situ FTIR techniques. Compared with Pd/Cu, Ag/Cu and Cu electrodes, Pd/Ag/Cu electrode exhibited the highest electrocatalytic activity for electroreductive reaction of 2,3-dichlorophenol. C-Cl bond was broken by reaction of adsorbed 2,3-dichlorophenolate with (H) ads Pd on Pd/Ag/Cu electrode surface. The main intermediate was 2-chlorophenolate, and the final product was phenolate.