Reaction analysis on sensing electrode of amperometric NO2 sensor based on sodium ion conductor by using chronopotentiometry

Masaki Ono; Kengo Shimanoe; Norio Miura; Noboru Yamazoe

doi:10.1016/S0925-4005(01)00676-1

Reaction analysis on sensing electrode of amperometric NO₂ sensor based on sodium ion conductor by using chronopotentiometry

Masaki Ono, Kengo Shimanoe, Norio Miura, Noboru Yamazoe

Functional Materials Science

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

13 Citations (Scopus)

Abstract

Galvanostatic chronopotentiometry was performed to identify the reaction products formed on the sensing electrode of an amperometric NO₂ sensor based on NASICON (Na⁺ conductor). It was indicated that the products after the sensing operation at 150 or 200°C were different, depending on the atmosphere. NaNO₂ and NaNO₃ were formed in the NO₂-containing air, while NaO_x (presumably Na₂O₂) was formed in the NO₂-free air. It is concluded that NaO_x is formed through the cathodic reaction of O₂, while NaNO₂ is formed as a primary product of the cathodic reaction of NO₂. It is also concluded that NaNO₃ is formed as a secondary product of the chemical reaction between NaO_x and NaNO₂ in dry condition, although the reaction between NaO_x and gaseous NO₂ also takes place in the humid condition as another root for NaNO₃ formation.

Original language	English
Pages (from-to)	78-83
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	77
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-4005(01)00676-1
Publication status	Published - Jun 15 2001

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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10.1016/S0925-4005(01)00676-1

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title = "Reaction analysis on sensing electrode of amperometric NO2 sensor based on sodium ion conductor by using chronopotentiometry",

abstract = "Galvanostatic chronopotentiometry was performed to identify the reaction products formed on the sensing electrode of an amperometric NO2 sensor based on NASICON (Na+ conductor). It was indicated that the products after the sensing operation at 150 or 200°C were different, depending on the atmosphere. NaNO2 and NaNO3 were formed in the NO2-containing air, while NaOx (presumably Na2O2) was formed in the NO2-free air. It is concluded that NaOx is formed through the cathodic reaction of O2, while NaNO2 is formed as a primary product of the cathodic reaction of NO2. It is also concluded that NaNO3 is formed as a secondary product of the chemical reaction between NaOx and NaNO2 in dry condition, although the reaction between NaOx and gaseous NO2 also takes place in the humid condition as another root for NaNO3 formation.",

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AU - Ono, Masaki

AU - Shimanoe, Kengo

AU - Miura, Norio

AU - Yamazoe, Noboru

PY - 2001/6/15

Y1 - 2001/6/15

N2 - Galvanostatic chronopotentiometry was performed to identify the reaction products formed on the sensing electrode of an amperometric NO2 sensor based on NASICON (Na+ conductor). It was indicated that the products after the sensing operation at 150 or 200°C were different, depending on the atmosphere. NaNO2 and NaNO3 were formed in the NO2-containing air, while NaOx (presumably Na2O2) was formed in the NO2-free air. It is concluded that NaOx is formed through the cathodic reaction of O2, while NaNO2 is formed as a primary product of the cathodic reaction of NO2. It is also concluded that NaNO3 is formed as a secondary product of the chemical reaction between NaOx and NaNO2 in dry condition, although the reaction between NaOx and gaseous NO2 also takes place in the humid condition as another root for NaNO3 formation.

AB - Galvanostatic chronopotentiometry was performed to identify the reaction products formed on the sensing electrode of an amperometric NO2 sensor based on NASICON (Na+ conductor). It was indicated that the products after the sensing operation at 150 or 200°C were different, depending on the atmosphere. NaNO2 and NaNO3 were formed in the NO2-containing air, while NaOx (presumably Na2O2) was formed in the NO2-free air. It is concluded that NaOx is formed through the cathodic reaction of O2, while NaNO2 is formed as a primary product of the cathodic reaction of NO2. It is also concluded that NaNO3 is formed as a secondary product of the chemical reaction between NaOx and NaNO2 in dry condition, although the reaction between NaOx and gaseous NO2 also takes place in the humid condition as another root for NaNO3 formation.

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Reaction analysis on sensing electrode of amperometric NO₂ sensor based on sodium ion conductor by using chronopotentiometry

Abstract

All Science Journal Classification (ASJC) codes

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