Fluctuations at electrode-YSZ interfaces

Torben Jacobsen; Karin Vels Hansen; Eivind Skou

doi:10.1149/1.2060667

Fluctuations at electrode-YSZ interfaces

University of Southern Denmark

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

678 Downloads (Orbit)

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 language	English
Journal	Journal of The Electrochemical Society
Volume	152
Issue number	11
Pages (from-to)	A2203-2206
ISSN	0013-4651
DOIs	https://doi.org/10.1149/1.2060667
Publication status	Published - 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).

Access to Document

10.1149/1.2060667

JacobsenFinal published version, 106 KB

OpenUrl availability

Check availability in DTU Findit

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\$\textasciicircum{}\textbackslash{}circ\$C. For the oxygen reduction process on Pt electrodes characteristic sawtooth shaped low frequency fluctuations are observed. At temperatures below 900\$\textasciicircum{}\textbackslash{}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 = "Institute of Physics",

number = "11",

}

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

SN - 0013-4651

VL - 152

SP - A2203-2206

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

IS - 11

ER -

Fluctuations at electrode-YSZ interfaces

Abstract

Bibliographical note

Access to Document

OpenUrl availability

Fingerprint

Cite this