A Critical Review of Models of the H-2/H2O/Ni/SZ Electrode Kinetics

Mogens Bjerg Mogensen; Jens Valdemar Thorvald Høgh; Karin Vels Hansen; Torben Jacobsen

doi:10.1149/1.2729236

A Critical Review of Models of the H_-2/H₂O/Ni/SZ Electrode Kinetics

Mogens Bjerg Mogensen, Jens Valdemar Thorvald Høgh, Karin Vels Hansen, Torben Jacobsen

Research output: Contribution to journal › Conference article › Research › peer-review

574 Downloads (Pure)

Abstract

Various models of the H-2/H2O/Ni/SZ (SZ = stabilized zirconia) electrode kinetics have been presented in the literature in order to explain the reported experimental data. However, there has been a strong tendency of using a limited set of data to "verify" a given model, disregarding other data sets, which do not fit the model. We have inspected some models in the literature, and problems (e.g. no quantitative model has explained the large variation in reported values of apparent activation energy of the electrode kinetics) as well as strengths of the models are discussed. We point out experimental findings that a useful model must be able to explain such as difference in sensitivity to poisoning by H2S due to differences in the detailed composition of the SZ and large change in apparent activation energy by change in cermet preparation. Finally, we will point out some elements, which seem important for any realistic and useful mathematical model of the H-2/H2O/Ni/SZ electrode.

Original language	English
Journal	E C S Transactions
Volume	7
Issue number	1
Pages (from-to)	1329-1338
ISSN	1938-5862
DOIs	https://doi.org/10.1149/1.2729236
Publication status	Published - 2007
Event	10th International symposium on solid oxide fuel cells - Nara New Public Hall, Nara, Japan Duration: 3 Jun 2007 → 8 Jun 2007 Conference number: 10

Conference

Conference	10th International symposium on solid oxide fuel cells
Number	10
Location	Nara New Public Hall
Country/Territory	Japan
City	Nara
Period	03/06/2007 → 08/06/2007

Bibliographical note

Copyright The Electrochemical Society, Inc. [2007]. 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).

Access to Document

10.1149/1.2729236

TorbenFinal published version, 318 KB

http://dx.doi.org/10.1149/1.2729236

OpenUrl availability

Full text

Cite this

@inproceedings{f8c4a4c681734f04b97bf1f8c0575e01,

title = "A Critical Review of Models of the H-2/H2O/Ni/SZ Electrode Kinetics",

abstract = "Various models of the H-2/H2O/Ni/SZ (SZ = stabilized zirconia) electrode kinetics have been presented in the literature in order to explain the reported experimental data. However, there has been a strong tendency of using a limited set of data to {"}verify{"} a given model, disregarding other data sets, which do not fit the model. We have inspected some models in the literature, and problems (e.g. no quantitative model has explained the large variation in reported values of apparent activation energy of the electrode kinetics) as well as strengths of the models are discussed. We point out experimental findings that a useful model must be able to explain such as difference in sensitivity to poisoning by H2S due to differences in the detailed composition of the SZ and large change in apparent activation energy by change in cermet preparation. Finally, we will point out some elements, which seem important for any realistic and useful mathematical model of the H-2/H2O/Ni/SZ electrode.",

author = "Mogensen, {Mogens Bjerg} and H{\o}gh, {Jens Valdemar Thorvald} and Hansen, {Karin Vels} and Torben Jacobsen",

note = "Copyright The Electrochemical Society, Inc. [2007]. 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).; 10th International symposium on solid oxide fuel cells, SOFC X ; Conference date: 03-06-2007 Through 08-06-2007",

year = "2007",

doi = "10.1149/1.2729236",

language = "English",

volume = "7",

pages = "1329--1338",

journal = "E C S Transactions",

issn = "1938-5862",

publisher = "The Electrochemical Society",

number = "1",

}

TY - GEN

T1 - A Critical Review of Models of the H-2/H2O/Ni/SZ Electrode Kinetics

AU - Mogensen, Mogens Bjerg

AU - Høgh, Jens Valdemar Thorvald

AU - Hansen, Karin Vels

AU - Jacobsen, Torben

N1 - Conference code: 10

PY - 2007

Y1 - 2007

N2 - Various models of the H-2/H2O/Ni/SZ (SZ = stabilized zirconia) electrode kinetics have been presented in the literature in order to explain the reported experimental data. However, there has been a strong tendency of using a limited set of data to "verify" a given model, disregarding other data sets, which do not fit the model. We have inspected some models in the literature, and problems (e.g. no quantitative model has explained the large variation in reported values of apparent activation energy of the electrode kinetics) as well as strengths of the models are discussed. We point out experimental findings that a useful model must be able to explain such as difference in sensitivity to poisoning by H2S due to differences in the detailed composition of the SZ and large change in apparent activation energy by change in cermet preparation. Finally, we will point out some elements, which seem important for any realistic and useful mathematical model of the H-2/H2O/Ni/SZ electrode.

AB - Various models of the H-2/H2O/Ni/SZ (SZ = stabilized zirconia) electrode kinetics have been presented in the literature in order to explain the reported experimental data. However, there has been a strong tendency of using a limited set of data to "verify" a given model, disregarding other data sets, which do not fit the model. We have inspected some models in the literature, and problems (e.g. no quantitative model has explained the large variation in reported values of apparent activation energy of the electrode kinetics) as well as strengths of the models are discussed. We point out experimental findings that a useful model must be able to explain such as difference in sensitivity to poisoning by H2S due to differences in the detailed composition of the SZ and large change in apparent activation energy by change in cermet preparation. Finally, we will point out some elements, which seem important for any realistic and useful mathematical model of the H-2/H2O/Ni/SZ electrode.

U2 - 10.1149/1.2729236

DO - 10.1149/1.2729236

M3 - Conference article

SN - 1938-5862

VL - 7

SP - 1329

EP - 1338

JO - E C S Transactions

JF - E C S Transactions

IS - 1

T2 - 10th International symposium on solid oxide fuel cells

Y2 - 3 June 2007 through 8 June 2007

ER -