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Solid Electrolyte CO2 Sensor Using Binary Carbonate Electrode
Yao, Shimizu, Miura and 1 other
Chemistry Letters1 Nov 1990
Solid Electrolyte CO2 Sensor Using Binary Carbonate Electrode
Yao, Shimizu, Miura and 1 other · Chemistry Letters · 1990 · Subscription
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Abstract
Abstract A simple potentiometric CO2 sensor based upon a Na+-conducting solid electrolyte (NASICON) was found to be greatly improved in response time and water vapor-resistance by using a binary carbonate electrode of BaCO3–Na2CO3. For a wide range of CO2 concentration from 4 to 400000 ppm, the electromotive force examined at 823 K followed a Nernst’s equation excellently, with a 90% response time of as short as 8 s. Water vapor hardly affected the sensor characteristics, in contrast to the case of a pure Na2CO3 electrode.