NASICON-based amperometric CO2 sensor using Na 2CO3-BaCO3 auxiliary phase

Ji Sun Lee, Jong Heun Lee, Seong Hyeon Hong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

An amperometric CO2 sensor was fabricated using a Pt|NASICON (Na+ conductor, Na3Zr2Si2PO 12)|Pt cell and a porous Na2CO3-BaCO 3 (1:1.7 in molar ratio) auxiliary layer. The sensor with the Na 2CO3-BaCO3 layer showed a faster response than that with the Na2CO3 layer, and the sensor signal was barely influenced by the humidity. When operated in an amperometric mode with an applied external electric field, the sensor could detect the CO2 concentration stably and precisely without the need for a reference gas or a reference electrode material, and the sensor signal was constant for extended test periods (60 days). The sensing mechanism and the long-term stability is discussed in terms of the amperometric operation of the sensor.

Original languageEnglish
Pages (from-to)663-668
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume96
Issue number3
DOIs
Publication statusPublished - 2003 Dec 1

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Amperometric sensors
sensors
Sensors
electrode materials
Atmospheric humidity
Gases
Electric fields
humidity
conductors
Electrodes
electric fields
cells
gases

Keywords

  • Amperometric CO sensing
  • NaCO -BaCO auxiliary phase
  • NASICON
  • Sensors

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

NASICON-based amperometric CO2 sensor using Na 2CO3-BaCO3 auxiliary phase. / Lee, Ji Sun; Lee, Jong Heun; Hong, Seong Hyeon.

In: Sensors and Actuators, B: Chemical, Vol. 96, No. 3, 01.12.2003, p. 663-668.

Research output: Contribution to journalArticle

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