An Ag-ZSM-5/SS zeolite modified electrode has been prepared by a facile one-step method, during which Ag nanoparticles were formed in situ with a ZSM-5 film grown on a stainless steel substrate. The morphology and composition were characterized by XRD, SEM, TEM, EDX, H₂-TPR, XPS, etc. Ag-ZSM-5/SS possessed much higher catalytic activity towards the electroreduction and electrocarboxylation of PhCH₂Cl compared with an Ag bulk electrode.