Materials for Electrochemical Gas Sensors with Liquid and Polymer Electrolytes

Materials for Electrochemical Gas Sensors with Liquid and Polymer Electrolytes 

In previous chapters we mainly discussed solid electrolyte gas sensors designed for application at increased temperature. In the present chapter our attention will be focused on the ambient-temperature liquid and polymer electrolyte gas sensors which are used mostly for medical and industrial hygiene applications. As shown in Chap. 1 (Vol. 1), electrochemical gas sensors usually include filter, man-brane (or capillary), electrolyte solution - in which the two or three electrodes (working or sensing electrode, WE, reference electrode, RE, and counter electrode, CE) are immersed, and manbrane. The electrochemical gas sensor produces a current or voltage when exposed to a gas/vapor containing an electroactive analyte because the analyte diffuses into the electrochemical cell, to the working electrode surface, and thereon participates in an electrochanical reaction that either prodnces or consumes electrons (i.e., a redox reaction) (Stetter et al. 2011). 

Korotcenkov, Handbook of Gas Sensor Materials Properties, Advantages and Shortcomings for Applications Volume 1 Conventional Approaches, Integrated Analytical Systems, 

Gas Electrolyte Membrane Electrode material Sens, type LOD (H,) Upper rtuige 

PVA polyvinyl alcohol, PBI Polybenzimidazole, A amperometric, P pote Korotcenkov et al. (2009). Copyright 2009 American Chemical Society 

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