Fluctuations at electrode-YSZ interfaces

    Research output: Contribution to journalJournal articleResearchpeer-review

    356 Downloads (Pure)

    Abstract

    Current fluctuations at potentiostatically controlled point electrodes of Pt, La$_{0.85}$Sr$_{0.15}$MnO$_3$ and Ni on YSZ surfaces are determined at 1000$^\circ$C. For the oxygen reduction process on Pt electrodes characteristic sawtooth shaped low frequency fluctuations are observed. At temperatures below 900$^\circ$C the fluctuations cease. At LSM oxygen electrodes and Ni hydrogen electrodes the fluctuations are similar in amplitude and frequency, but the characteristic shape is not observed. Also some spectacular, but not easily reproduced, observations on Ni electrodes in hydrogen/water atmosphere are presented for discussion. The origin of the observations is not known at present but it appears likely that they are related to the activation/deactivation mechanism of SOFCs.
    Original languageEnglish
    JournalJournal of The Electrochemical Society
    Volume152
    Issue number11
    Pages (from-to)A2203-2206
    ISSN0013-4651
    DOIs
    Publication statusPublished - 2005

    Bibliographical note

    Copyright The Electrochemical Society, Inc. [2005]. 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

    @article{a2713f9b1b114e43bd15b5363754c183,
    title = "Fluctuations at electrode-YSZ interfaces",
    abstract = "Current fluctuations at potentiostatically controlled point electrodes of Pt, La$_{0.85}$Sr$_{0.15}$MnO$_3$ and Ni on YSZ surfaces are determined at 1000$^\circ$C. For the oxygen reduction process on Pt electrodes characteristic sawtooth shaped low frequency fluctuations are observed. At temperatures below 900$^\circ$C the fluctuations cease. At LSM oxygen electrodes and Ni hydrogen electrodes the fluctuations are similar in amplitude and frequency, but the characteristic shape is not observed. Also some spectacular, but not easily reproduced, observations on Ni electrodes in hydrogen/water atmosphere are presented for discussion. The origin of the observations is not known at present but it appears likely that they are related to the activation/deactivation mechanism of SOFCs.",
    author = "Torben Jacobsen and Hansen, {Karin Vels} and Eivind Skou",
    note = "Copyright The Electrochemical Society, Inc. [2005]. 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 = "2005",
    doi = "10.1149/1.2060667",
    language = "English",
    volume = "152",
    pages = "A2203--2206",
    journal = "Journal of The Electrochemical Society",
    issn = "0013-4651",
    publisher = "The Electrochemical Society",
    number = "11",

    }

    Fluctuations at electrode-YSZ interfaces. / Jacobsen, Torben; Hansen, Karin Vels; Skou, Eivind.

    In: Journal of The Electrochemical Society, Vol. 152, No. 11, 2005, p. A2203-2206.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - Fluctuations at electrode-YSZ interfaces

    AU - Jacobsen, Torben

    AU - Hansen, Karin Vels

    AU - Skou, Eivind

    N1 - Copyright The Electrochemical Society, Inc. [2005]. 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 - 2005

    Y1 - 2005

    N2 - Current fluctuations at potentiostatically controlled point electrodes of Pt, La$_{0.85}$Sr$_{0.15}$MnO$_3$ and Ni on YSZ surfaces are determined at 1000$^\circ$C. For the oxygen reduction process on Pt electrodes characteristic sawtooth shaped low frequency fluctuations are observed. At temperatures below 900$^\circ$C the fluctuations cease. At LSM oxygen electrodes and Ni hydrogen electrodes the fluctuations are similar in amplitude and frequency, but the characteristic shape is not observed. Also some spectacular, but not easily reproduced, observations on Ni electrodes in hydrogen/water atmosphere are presented for discussion. The origin of the observations is not known at present but it appears likely that they are related to the activation/deactivation mechanism of SOFCs.

    AB - Current fluctuations at potentiostatically controlled point electrodes of Pt, La$_{0.85}$Sr$_{0.15}$MnO$_3$ and Ni on YSZ surfaces are determined at 1000$^\circ$C. For the oxygen reduction process on Pt electrodes characteristic sawtooth shaped low frequency fluctuations are observed. At temperatures below 900$^\circ$C the fluctuations cease. At LSM oxygen electrodes and Ni hydrogen electrodes the fluctuations are similar in amplitude and frequency, but the characteristic shape is not observed. Also some spectacular, but not easily reproduced, observations on Ni electrodes in hydrogen/water atmosphere are presented for discussion. The origin of the observations is not known at present but it appears likely that they are related to the activation/deactivation mechanism of SOFCs.

    U2 - 10.1149/1.2060667

    DO - 10.1149/1.2060667

    M3 - Journal article

    VL - 152

    SP - A2203-2206

    JO - Journal of The Electrochemical Society

    JF - Journal of The Electrochemical Society

    SN - 0013-4651

    IS - 11

    ER -