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Solid electrolyte carbon dioxide sensor using sodium ionic conductor and lithium carbonate-based auxiliary phase

  • Solid-State Ionics
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Abstract

A solid electrolyte CO2 sensor using a sodium ionic conductor and a lithium carbonate-based auxiliary phase was investigated. The sensor responded excellently to CO2 in the temperature range of 350–600° C, without being affected by coexistent water vapor. The EMF responses to varying partial pressures of CO2 (P CO 2) followed a 2-electron reaction of CO2 under fixed P O 2. Under fixed P CO 2 (2×10−3 atm), the EMF was found to be almost independent of P O 2 at temperatures above 450° C, while it depended on P O 2 following a 2-electron reaction of O2 at 305° C and below. Two alternative sensing electrode reactions were proposed to take place depending on the working temperature.

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Yao, S., Shimizu, Y., Miura, N. et al. Solid electrolyte carbon dioxide sensor using sodium ionic conductor and lithium carbonate-based auxiliary phase. Appl. Phys. A 57, 25–29 (1993). https://doi.org/10.1007/BF00331212

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  • DOI: https://doi.org/10.1007/BF00331212

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