Solid redox polymer electrolyte-based amperometric sensors for the direct monitoring of ozone in gas phase
(EN)
Stergiou, D. V.
(EN)
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
(EL)
Stergiou, D. V.
(EN)
The response of solid redox polymer electrolytes of the type polyethylene oxide (PEO)XI/I(2) (X: Li, Rb) towards O(3) in gas phase is reported for the first time. The proposed approach is based on the current recorded at a redox polymer electrolyte-modified two-gold-surface electrode assembly poised at +300 mV. Ozone reacts with the iodide species in the bulk electrolyte producing triiodides. This results in the increase of the diffusion rate of I(3)(-) to the cathode where I(3)(-) are reduced to iodides, giving thus rise to the production of a faradic response. Various experimental parameters were optimized and the best results were obtained for the PEO/RbI/I(2) redox polymer, which is successfully used for the on-line monitoring of O(3) in synthetic air samples in ambient conditions. (C) 2009 Elsevier B.V. All rights reserved.
(EN)
