Abstract
The fabrication of an electrochemical sensor based on novel poly(pyrrole-co-3acetyl pyrrole)-WO3 nanocomposites modified gold electrode (PPAP-WO3-AuE) and its electrocatalytic oxidation and reduction of hydrogen peroxide is described here. The PPAP-WO3 nanocomposites were synthesized by chemical method and characterized by different techniques. The WO3 nanoparticles incorporated with PPAP were confirmed by x-ray diffraction pattern, scanning electron microscopy and transmission electron microscope micrograph. The electrochemical behaviour of PPAP-WO3-AuE towards the electro catalytic oxidation and reduction of hydrogen peroxide was investigated by cyclic voltammetry, differential pulse voltammetry and square wave voltammetry. The observed DPVs and SWVs response depend linearly on concentration of hydrogen peroxide in the range of 1-10 mM and with limit of detection (LOD) is 1×10-4 M. The correlation coefficients were found as 0.991, 0.930 and sensitivity observed was 47.64 mA/mM.cm2 and 8.31mA/mM.cm2. These results indicate the PPAP-WO3-AuE exhibited good platform and could be used for electrochemical determination of hydrogen peroxide.
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