Electrocatalytic Study at Silver/Polypyrrole Nanowires Composite Modified Electrodes

Abstract

Silver modified composite electrodes were prepared by electrochemical

method on the polypyrrole (PPy) nanowires modified electrodes.

The surface behaviour of it was investigated by scanning electronic

microscopy and energy-dispersive X-ray analysis (EDX). The electrocatalytic

activity of it was characterized by electroreduction of nitrate

and their reduction products. The effect of solution pH, electrolytic

potentials and electrolytic current density on nitrate electrolysis and the

product were also examined. The experimental results indicate that Ag/

PPy nanowires composite modified electrodes have higher catalytic

activity toward nitrate reduction, the nitrite and ammonia in the resulted

solution products are always at low concentration. This result shows

that the electrodes have promising application in environmental

remediation.