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

Ji Sun Lee; Jong Heun Lee; Seong Hyeon Hong

doi:10.1016/j.snb.2003.08.001

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

Ji Sun Lee, Jong Heun Lee, Seong Hyeon Hong

Research output: Contribution to journal › Article › peer-review

22 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 language	English
Pages (from-to)	663-668
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	96
Issue number	3
DOIs	https://doi.org/10.1016/j.snb.2003.08.001
Publication status	Published - 2003 Dec 1

Bibliographical note

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

Keywords

Amperometric CO sensing
NASICON
NaCO -BaCO auxiliary phase
Sensors

ASJC Scopus subject areas

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

Access to Document

10.1016/j.snb.2003.08.001

Cite this

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title = "NASICON-based amperometric CO2 sensor using Na 2CO3-BaCO3 auxiliary phase",

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.",

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