Transition metal ion-substituted polyoxometalates entrapped into polypyrrole as electrochemical sensor for hydrogen peroxide

Anwar, Nargis and Vagin, Mikhail and Laffir, Fathima and Armstrong, Gordon and Dickinson, Calum and McCormac, Timothy (2011) Transition metal ion-substituted polyoxometalates entrapped into polypyrrole as electrochemical sensor for hydrogen peroxide. Analyst. (Submitted)

Preview

PDF - Accepted Version Download (759kB) | Preview

Abstract

A conducting polymer was used for the immobilization of various transition metal ion-substituted Dawson-type polyoxometalates (POMs) onto glassy carbon electrodes. Voltammetric responses of films of different thicknesses were stable within the pH domain 2-7 and reveal redox processes associated with the conducting polymer, the entrapped POMs and incorporated metal ions. The resulting POM doped 10 polypyrrole films were found to be extremely stable towards redox switching between the various redox states associated with the incorporated POM. An amperometric sensor for hydrogen peroxide detection based upon the POM doped polymer films was investigated. The detection limits were 0.3 and 0.6 uM, for the Cu 2+ - and Fe 3+ -substituted POM-doped polypyrrole films respectively, with a linear region from 0.1 up to 2mM H 2 O 2 . Surface characterization of the polymer films was carried out using atomic force 15 microscopy, x-ray photoelectron spectroscopy and scanning electron microscopy.

Item Type:	Article
Uncontrolled Keywords:	Electrochemistry; Polyoxometalates (POMs); Hydrogen peroxide detection; Polymer film
Subjects:	Science
Research Centres:	Electrochemistry Research Group
Depositing User:	Concepta Woods
Date Deposited:	26 Nov 2011 13:28
Last Modified:	11 Nov 2014 16:10
URI:	https://eprints.dkit.ie/id/eprint/71

Actions (login required)

View Item

Downloads