Solid redox polymer electrolyte-based amperometric sensors for the direct monitoring of ozone in gas phase

• Published in: Electrochemistry communications Vol. 11; no. 11; pp. 2113 - 2116
• Main Authors: Stergiou, Dimitrios V., Stergiopoulos, Thomas, Falaras, Polycarpos, Prodromidis, Mamas I.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.11.2009; Amsterdam Elsevier; New York, NY
• Subjects: Analytical chemistry; Chemistry; Electrochemical methods; Electrochemical sensors; Exact sciences and technology; Iodide/iodine; On-line monitoring of ozone; Polyethylene oxide; Solid redox polymer electrolytes; On-line monitoring of ozone; Solid redox polymer electrolytes; Iodide/iodine; Polyethylene oxide; Electrochemical sensors; Polymer solid electrolyte; Ozone; Redox polymer; Electrochemical detector; Ethylene oxide polymer; Amperometry; Lithium Iodides; Rubidium Iodides; Gas phase; Monitoring; Iodine
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2009.09.007

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.