Double-cell carbon dioxide sensor based on Li-K molten carbonate with electrochemically-supplied CO2-O2 reference

Hiroshige Matsumoto, Makoto Kuribayashi, Koji Katahira, Hiroyasu Iwahara

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3 Citations (Scopus)


A carbon dioxide sensor using molten carbonate electrolyte with double-cell structure was examined; one cell was employed for electrochemical pumping of CO2 and O2 from ambient atmosphere and the other was used for sensing of the ambient CO2 with the pumped CO2-O2 mixture as a reference gas. The sensor was operated at 600 °C for the sensing of CO2-containing air. By sending appropriate current, the pumping cell could provide CO2 and O2 at 2/3 and 1/3 of the atmospheric pressure, respectively. The sensing cell showed EMF with respect to the CO2 and O2 partial pressures against the pumped CO2-O2 reference gas. The sensor could determine the partial pressure of CO2 in the examined range of 26 to 1×104 Pa (260-100,000 ppm).

Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalSensors and Actuators, B: Chemical
Issue number2-3
Publication statusPublished - Mar 10 2001
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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