Electrochemical Reduction of Oxygen and Nitric Oxide at Low Temperature on La1−xSrxCoO3−delta Cathodes

Kent Kammer Hansen

doi:10.1149/1.3464775

Electrochemical Reduction of Oxygen and Nitric Oxide at Low Temperature on La1−xSrxCoO3−delta Cathodes

Kent Kammer Hansen

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Abstract

Six La1-xSrxCoO3- (x= 0, 0.05, 0.15, 0.25, 0.35, 0.50) perovskites were synthesised and characterised by powder XRD and cyclic voltammetry on cone-shaped electrodes in either air or nitric oxide in argon at 200, 300 and 400oC. At 200oC the current densities in air was highest for the strontium free cobaltite, whereas the current densities was highest for La0.95Sr0.05CoO3- in the nitric oxide containing atmosphere. This was also the compound with the highest INO/IO2 current ratio at 200oC. At higher temperatures a limiting cathodic current was observed for all of the cobaltite’s, except La0.50Sr0.50CoO3-, in both air and the nitric oxide containing atmosphere. This was attributed to a rate limiting chemical step (i.e. dissociation of oxygen or nitric oxide) in the reaction sequence.

Original language	English
Journal	Journal of The Electrochemical Society
Volume	157
Issue number	9
Pages (from-to)	P79-P82
ISSN	0013-4651
DOIs	https://doi.org/10.1149/1.3464775
Publication status	Published - 2010

Bibliographical note

Copyright The Electrochemical Society, Inc. [2010]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

Keywords

Fuel Cells and hydrogen
Flue gas purification

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title = "Electrochemical Reduction of Oxygen and Nitric Oxide at Low Temperature on La1−xSrxCoO3−delta Cathodes",

abstract = "Six La1-xSrxCoO3- (x= 0, 0.05, 0.15, 0.25, 0.35, 0.50) perovskites were synthesised and characterised by powder XRD and cyclic voltammetry on cone-shaped electrodes in either air or nitric oxide in argon at 200, 300 and 400oC. At 200oC the current densities in air was highest for the strontium free cobaltite, whereas the current densities was highest for La0.95Sr0.05CoO3- in the nitric oxide containing atmosphere. This was also the compound with the highest INO/IO2 current ratio at 200oC. At higher temperatures a limiting cathodic current was observed for all of the cobaltite{\textquoteright}s, except La0.50Sr0.50CoO3-, in both air and the nitric oxide containing atmosphere. This was attributed to a rate limiting chemical step (i.e. dissociation of oxygen or nitric oxide) in the reaction sequence.",

keywords = "Fuel Cells and hydrogen, Flue gas purification, R{\o}ggasrens, Br{\ae}ndselsceller og brint",

author = "{Kammer Hansen}, Kent",

note = "Copyright The Electrochemical Society, Inc. [2010]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).",

year = "2010",

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TY - JOUR

T1 - Electrochemical Reduction of Oxygen and Nitric Oxide at Low Temperature on La1−xSrxCoO3−delta Cathodes

AU - Kammer Hansen, Kent

N1 - Copyright The Electrochemical Society, Inc. [2010]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

PY - 2010

Y1 - 2010

N2 - Six La1-xSrxCoO3- (x= 0, 0.05, 0.15, 0.25, 0.35, 0.50) perovskites were synthesised and characterised by powder XRD and cyclic voltammetry on cone-shaped electrodes in either air or nitric oxide in argon at 200, 300 and 400oC. At 200oC the current densities in air was highest for the strontium free cobaltite, whereas the current densities was highest for La0.95Sr0.05CoO3- in the nitric oxide containing atmosphere. This was also the compound with the highest INO/IO2 current ratio at 200oC. At higher temperatures a limiting cathodic current was observed for all of the cobaltite’s, except La0.50Sr0.50CoO3-, in both air and the nitric oxide containing atmosphere. This was attributed to a rate limiting chemical step (i.e. dissociation of oxygen or nitric oxide) in the reaction sequence.

AB - Six La1-xSrxCoO3- (x= 0, 0.05, 0.15, 0.25, 0.35, 0.50) perovskites were synthesised and characterised by powder XRD and cyclic voltammetry on cone-shaped electrodes in either air or nitric oxide in argon at 200, 300 and 400oC. At 200oC the current densities in air was highest for the strontium free cobaltite, whereas the current densities was highest for La0.95Sr0.05CoO3- in the nitric oxide containing atmosphere. This was also the compound with the highest INO/IO2 current ratio at 200oC. At higher temperatures a limiting cathodic current was observed for all of the cobaltite’s, except La0.50Sr0.50CoO3-, in both air and the nitric oxide containing atmosphere. This was attributed to a rate limiting chemical step (i.e. dissociation of oxygen or nitric oxide) in the reaction sequence.

KW - Fuel Cells and hydrogen

KW - Flue gas purification

KW - Røggasrens

KW - Brændselsceller og brint

U2 - 10.1149/1.3464775

DO - 10.1149/1.3464775

M3 - Journal article

VL - 157

SP - P79-P82

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

SN - 0013-4651

IS - 9

ER -

Electrochemical Reduction of Oxygen and Nitric Oxide at Low Temperature on La1−xSrxCoO3−delta Cathodes

Abstract

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