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

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    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 languageEnglish
    JournalE C S Transactions
    Volume7
    Issue number1
    Pages (from-to)1329-1338
    ISSN1938-5862
    DOIs
    Publication statusPublished - 2007
    Event10th International symposium on solid oxide fuel cells - Nara New Public Hall, Nara, Japan
    Duration: 3 Jun 20078 Jun 2007
    Conference number: 10

    Conference

    Conference10th International symposium on solid oxide fuel cells
    Number10
    LocationNara New Public Hall
    CountryJapan
    CityNara
    Period03/06/200708/06/2007

    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).

    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).",
    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",

    }

    A Critical Review of Models of the H-2/H2O/Ni/SZ Electrode Kinetics. / Mogensen, Mogens Bjerg; Høgh, Jens Valdemar Thorvald; Hansen, Karin Vels; Jacobsen, Torben.

    In: E C S Transactions, Vol. 7, No. 1, 2007, p. 1329-1338.

    Research output: Contribution to journalConference articleResearchpeer-review

    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 - 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).

    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

    VL - 7

    SP - 1329

    EP - 1338

    JO - E C S Transactions

    JF - E C S Transactions

    SN - 1938-5862

    IS - 1

    ER -