Solid-state amperometric sensor based on a sodium ion conductor for detection of total NO x in an atmospheric environment

Masaki Ono; Kengo Shimanoe; Norio Miura; Noboru Yamazoe

doi:10.1149/1.1390833

Solid-state amperometric sensor based on a sodium ion conductor for detection of total NO _x in an atmospheric environment

Masaki Ono, Kengo Shimanoe, Norio Miura, Noboru Yamazoe

Functional Materials Science

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

7 Citations (Scopus)

Abstract

An Na ⁺ conductor-based amperometric sensor was designed for the detection of total NO _x (NO+NO ₂) in air. An original amperometric device, attached with a layer of NaNO ₂ on the counter electrode (Au) was sensitive to NO ₂, but insensitive to NO. In order to make the device sensitive to NO, the sensing electrode (Au) was covered with double layers of catalysts to oxidize NO to NO ₂, i.e., WO ₃ and Pt (0.5 wt %)-loaded SiO ₂. At the sensing electrode potential fixed at -150 mV vs. the reference electrode (Au), the current response was proportional to the concentration of NO ₂ or NO up to 1 ppm at 150 °C. In addition, the proportionality constants (sensitivity) were almost the same to NO and NO ₂. The current responses were hardly affected by the coexistence of CO ₂ and H ₂O. The NO _x sensing mechanism of the present sensor was briefly discussed.

Original language	English
Pages (from-to)	349-351
Number of pages	3
Journal	Electrochemical and Solid-State Letters
Volume	2
Issue number	7
DOIs	https://doi.org/10.1149/1.1390833
Publication status	Published - Jul 1 1999

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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10.1149/1.1390833

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title = "Solid-state amperometric sensor based on a sodium ion conductor for detection of total NO x in an atmospheric environment",

abstract = "An Na + conductor-based amperometric sensor was designed for the detection of total NO x (NO+NO 2) in air. An original amperometric device, attached with a layer of NaNO 2 on the counter electrode (Au) was sensitive to NO 2, but insensitive to NO. In order to make the device sensitive to NO, the sensing electrode (Au) was covered with double layers of catalysts to oxidize NO to NO 2, i.e., WO 3 and Pt (0.5 wt %)-loaded SiO 2. At the sensing electrode potential fixed at -150 mV vs. the reference electrode (Au), the current response was proportional to the concentration of NO 2 or NO up to 1 ppm at 150 °C. In addition, the proportionality constants (sensitivity) were almost the same to NO and NO 2. The current responses were hardly affected by the coexistence of CO 2 and H 2O. The NO x sensing mechanism of the present sensor was briefly discussed.",

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AU - Ono, Masaki

AU - Shimanoe, Kengo

AU - Miura, Norio

AU - Yamazoe, Noboru

PY - 1999/7/1

Y1 - 1999/7/1

N2 - An Na + conductor-based amperometric sensor was designed for the detection of total NO x (NO+NO 2) in air. An original amperometric device, attached with a layer of NaNO 2 on the counter electrode (Au) was sensitive to NO 2, but insensitive to NO. In order to make the device sensitive to NO, the sensing electrode (Au) was covered with double layers of catalysts to oxidize NO to NO 2, i.e., WO 3 and Pt (0.5 wt %)-loaded SiO 2. At the sensing electrode potential fixed at -150 mV vs. the reference electrode (Au), the current response was proportional to the concentration of NO 2 or NO up to 1 ppm at 150 °C. In addition, the proportionality constants (sensitivity) were almost the same to NO and NO 2. The current responses were hardly affected by the coexistence of CO 2 and H 2O. The NO x sensing mechanism of the present sensor was briefly discussed.

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Solid-state amperometric sensor based on a sodium ion conductor for detection of total NO _x in an atmospheric environment

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