Stability and interfacial structure of a NASICON-Based CO2 Sensor Fitted with a Solid-Reference electrode

Tetsuya Kida, Shotaro Kishi, Noboru Yamazoe, Kengo Shimanoe

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We investigated the stability of a NASICON (Na3Zr 2Si2PO12)-based potentiometric CO2 sensor fitted with a composite of BiCuVOx (Bi2Cu0.1V 0.9O5.35) and perovskite-type-oxide (La 0.6Sr0.4Co0.78Ni0.02Fe 0.2O3) as a solid-reference electrode. The sensor showed stable electromotive force (EMF) responses to changes in CO2 concentration (400-2000 ppm) at 400 °C in high humid air (100% RH at 45 °C). Notably, no significant fluctuation in the potential of the solidreference electrode was observed even after the sensor device was kept under high humid conditions at room temperature for a long period (1-2 days). SEM (scanning electron spectroscopy)-EDX (energy dispersive X-ray spectroscopy) analysis revealed the presence of a thick interfacial layer between NASICON and the solid-reference electrode that may prevent NASICON from reacting with water and CO2.

Original languageEnglish
Pages (from-to)288-293
Number of pages6
JournalSensor Letters
Volume9
Issue number1
DOIs
Publication statusPublished - Dec 15 2011

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Electrodes
electrodes
sensors
Sensors
Potentiometric sensors
Electromotive force
electromotive forces
Electron spectroscopy
Perovskite
electron spectroscopy
Energy dispersive spectroscopy
Scanning
Scanning electron microscopy
scanning electron microscopy
Oxides
scanning
composite materials
oxides
air
Composite materials

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Stability and interfacial structure of a NASICON-Based CO2 Sensor Fitted with a Solid-Reference electrode. / Kida, Tetsuya; Kishi, Shotaro; Yamazoe, Noboru; Shimanoe, Kengo.

In: Sensor Letters, Vol. 9, No. 1, 15.12.2011, p. 288-293.

Research output: Contribution to journalArticle

Kida, Tetsuya ; Kishi, Shotaro ; Yamazoe, Noboru ; Shimanoe, Kengo. / Stability and interfacial structure of a NASICON-Based CO2 Sensor Fitted with a Solid-Reference electrode. In: Sensor Letters. 2011 ; Vol. 9, No. 1. pp. 288-293.
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