ELECTROCATALYTIC REDUCTION OF NITRITE AT POLYPYRROLE /CELLULOSIC ELECTRODE FROM POTABLE WATER

Abstract

Nitrite species are widely involved in environmental chemistry and public health; its role was recognized long time ago [1]. Although, naturally occurring concentrations of nitrite are usually of no health significance, wastes from fertilizers or intentional additions of nitrite for corrosion control are potential sources of contamination [2,3]. pyrrole is one of most important organic conducting polymers, which is found in wide applications in analytical chemistry. In this work, we report the simple chemical plymerization process with lron (III) chloride anhydrous (FeCl3) as an oxydant. To obtain thin film of polypyrrole (PPy) deposited onto the electrode of the cellulosic. The morphology of the surface of the PPy/cellulosic films were studied by the cyclic voltammetry (CV), electrochemical impedance spectroscopy (SIE), Fourier-transform infrared spectroscopy (FTIR), profilometer apparatus, scanning microscope (SEM) copled with energy dispersive Xray spectrometry (EDX) and X-ray diffraction (XRD). Then, from electrolysis experiments, their activity and selectivity for the nitrite electroreduction reaction will be evaluated under potentiostatic conditions.