ELECTROCHEMICAL GAS SENSORS WITH HYDROPHILIC POLYMER ELECTROLYTE

The functional properties of electrochemical gas sensors with hydrophi lic polymer electrolyte were analyzed by comparing them with those of sensors with free electrolyte, and also with hydrophobic polymer elect rolyte. Two model reactions (oxygen electroreduction and hydrogen elec trooxidation) were used to show how they proceeded at the interface be tween a platinum electrode and a polyvinyl alcohol-based hydrophilic p olymer electrolyte. Some metrological parameters of oxygen and hydroge n sensors with hydrophilic polymer electrolyte are presented: the depe ndence of the sensor signal on the concentration of the measured gas c omponent, fast response, and operating life.