Limiting current characteristics with regard to oxygen and carbon monoxide in oxidizing and reducing atmospheres

Jong Heun Lee; Hoin Kim; Byung Ki Kim

doi:10.1016/0167-2738(96)00274-3

Limiting current characteristics with regard to oxygen and carbon monoxide in oxidizing and reducing atmospheres

Jong Heun Lee, Hoin Kim, Byung Ki Kim

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

12 Citations (Scopus)

Abstract

The limiting current characteristics with regard to O₂ and CO were studied in oxidizing (O₂-CO₂-N₂) and reducing(CO-CO₂-N₂) atmospheres. The experimental I-V characteristics were compared with a simulation and discussed considering the electrochemical oxidation and decomposition between CO and CO₂. The decomposition of CO₂ was one of the main O₂ sources of oxygen pumping in reducing atmospheres. The limiting current with regard to CO in reducing atmospheres showed a sloped limiting current regime at 700-725°C, while that with regard to O₂ in oxidizing atmospheres did not. The sloped limiting current of CO resulted from electrode reactions which were different from those in oxidizing atmospheres, i.e. the CO₂ decomposition for the O₂ pumping cell and the CO oxidation for the O₂ consuming cell.

Original language	English
Pages (from-to)	1087-1093
Number of pages	7
Journal	Solid State Ionics
Volume	86-88
Issue number	PART 2
DOIs	https://doi.org/10.1016/0167-2738(96)00274-3
Publication status	Published - 1996 Jul
Externally published	Yes

Keywords

Limiting current
Oxygen pumping
Pt electrode
Solid electrolyte

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1016/0167-2738(96)00274-3

Cite this

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title = "Limiting current characteristics with regard to oxygen and carbon monoxide in oxidizing and reducing atmospheres",

abstract = "The limiting current characteristics with regard to O2 and CO were studied in oxidizing (O2-CO2-N2) and reducing(CO-CO2-N2) atmospheres. The experimental I-V characteristics were compared with a simulation and discussed considering the electrochemical oxidation and decomposition between CO and CO2. The decomposition of CO2 was one of the main O2 sources of oxygen pumping in reducing atmospheres. The limiting current with regard to CO in reducing atmospheres showed a sloped limiting current regime at 700-725°C, while that with regard to O2 in oxidizing atmospheres did not. The sloped limiting current of CO resulted from electrode reactions which were different from those in oxidizing atmospheres, i.e. the CO2 decomposition for the O2 pumping cell and the CO oxidation for the O2 consuming cell.",

keywords = "Limiting current, Oxygen pumping, Pt electrode, Solid electrolyte",

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year = "1996",

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doi = "10.1016/0167-2738(96)00274-3",

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TY - JOUR

T1 - Limiting current characteristics with regard to oxygen and carbon monoxide in oxidizing and reducing atmospheres

AU - Lee, Jong Heun

AU - Kim, Hoin

AU - Kim, Byung Ki

PY - 1996/7

Y1 - 1996/7

N2 - The limiting current characteristics with regard to O2 and CO were studied in oxidizing (O2-CO2-N2) and reducing(CO-CO2-N2) atmospheres. The experimental I-V characteristics were compared with a simulation and discussed considering the electrochemical oxidation and decomposition between CO and CO2. The decomposition of CO2 was one of the main O2 sources of oxygen pumping in reducing atmospheres. The limiting current with regard to CO in reducing atmospheres showed a sloped limiting current regime at 700-725°C, while that with regard to O2 in oxidizing atmospheres did not. The sloped limiting current of CO resulted from electrode reactions which were different from those in oxidizing atmospheres, i.e. the CO2 decomposition for the O2 pumping cell and the CO oxidation for the O2 consuming cell.

AB - The limiting current characteristics with regard to O2 and CO were studied in oxidizing (O2-CO2-N2) and reducing(CO-CO2-N2) atmospheres. The experimental I-V characteristics were compared with a simulation and discussed considering the electrochemical oxidation and decomposition between CO and CO2. The decomposition of CO2 was one of the main O2 sources of oxygen pumping in reducing atmospheres. The limiting current with regard to CO in reducing atmospheres showed a sloped limiting current regime at 700-725°C, while that with regard to O2 in oxidizing atmospheres did not. The sloped limiting current of CO resulted from electrode reactions which were different from those in oxidizing atmospheres, i.e. the CO2 decomposition for the O2 pumping cell and the CO oxidation for the O2 consuming cell.

KW - Limiting current

KW - Oxygen pumping

KW - Pt electrode

KW - Solid electrolyte

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DO - 10.1016/0167-2738(96)00274-3

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AN - SCOPUS:0030182067

SN - 0167-2738

VL - 86-88

SP - 1087

EP - 1093

JO - Solid State Ionics

JF - Solid State Ionics

IS - PART 2

ER -

Limiting current characteristics with regard to oxygen and carbon monoxide in oxidizing and reducing atmospheres

Abstract

Keywords

ASJC Scopus subject areas

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