Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | B44-B53 |
| Fachzeitschrift | Journal of the Electrochemical Society |
| Jahrgang | 158 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - 2011 |
| Extern publiziert | Ja |
Abstract
In 2005 Zhang and Datta published a model for describing autonomous potential oscillations in a Pt/Ru -catalyst-polymer electrolyte membrane (PEM) fuel cell operated with CO rich reformate [J. X. Zhang and R. Datta, J. Electrochem. Soc., 152, A1180 (2005)]. In the present contribution, we simplify a spatially extended version of this model in order to relate appearing pattern formation to electrochemical coupling mechanisms described by Krischer [K. Krischer, in Advances in Electrochemical Science and Engineering, Wiley (2003)]. It is concluded that mean-field- and migration-coupling are the fundamental mechanisms dictating pattern formation in the studied system. By artificially separating the electrical coupling terms it is found that large mean-field-coupling leads to a frequency entrainment and migration-coupling to a spatio-temporal intermittency scenario. It is argued that each of the situations can be found under realistic conditions, depending on the membrane conductivity and the system dimensions. © 2010 The Electrochemical Society
Schlagwörter
- Electric conductivity, Electrochemistry, Fuel cells, Speech recognition, PEM fuel cell; Polymer electrolyte membrane fuel cells; Potential oscillations; Realistic conditions; Reformates, Spatio-temporal intermittency
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Energie (insg.)
- Erneuerbare Energien, Nachhaltigkeit und Umwelt
- Werkstoffwissenschaften (insg.)
- Oberflächen, Beschichtungen und Folien
- Chemie (insg.)
- Elektrochemie
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
Ziele für nachhaltige Entwicklung
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in: Journal of the Electrochemical Society, Jahrgang 158, Nr. 1, 2011, S. B44-B53.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Analysis of spatio-temporal pattern formation in a PEM fuel cell with Pt/Ru anode exposed to H2 /CO mixtures
AU - Kirsch, Sebastian
AU - Hanke-Rauschenbach, Richard
AU - Sundmacher, Kai
N1 - Copyright: Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - AbstractIn 2005 Zhang and Datta published a model for describing autonomous potential oscillations in a Pt/Ru -catalyst-polymer electrolyte membrane (PEM) fuel cell operated with CO rich reformate [J. X. Zhang and R. Datta, J. Electrochem. Soc., 152, A1180 (2005)]. In the present contribution, we simplify a spatially extended version of this model in order to relate appearing pattern formation to electrochemical coupling mechanisms described by Krischer [K. Krischer, in Advances in Electrochemical Science and Engineering, Wiley (2003)]. It is concluded that mean-field- and migration-coupling are the fundamental mechanisms dictating pattern formation in the studied system. By artificially separating the electrical coupling terms it is found that large mean-field-coupling leads to a frequency entrainment and migration-coupling to a spatio-temporal intermittency scenario. It is argued that each of the situations can be found under realistic conditions, depending on the membrane conductivity and the system dimensions. © 2010 The Electrochemical Society
AB - AbstractIn 2005 Zhang and Datta published a model for describing autonomous potential oscillations in a Pt/Ru -catalyst-polymer electrolyte membrane (PEM) fuel cell operated with CO rich reformate [J. X. Zhang and R. Datta, J. Electrochem. Soc., 152, A1180 (2005)]. In the present contribution, we simplify a spatially extended version of this model in order to relate appearing pattern formation to electrochemical coupling mechanisms described by Krischer [K. Krischer, in Advances in Electrochemical Science and Engineering, Wiley (2003)]. It is concluded that mean-field- and migration-coupling are the fundamental mechanisms dictating pattern formation in the studied system. By artificially separating the electrical coupling terms it is found that large mean-field-coupling leads to a frequency entrainment and migration-coupling to a spatio-temporal intermittency scenario. It is argued that each of the situations can be found under realistic conditions, depending on the membrane conductivity and the system dimensions. © 2010 The Electrochemical Society
KW - Electric conductivity
KW - Electrochemistry
KW - Fuel cells
KW - Speech recognition
KW - PEM fuel cell; Polymer electrolyte membrane fuel cells; Potential oscillations; Realistic conditions; Reformates
KW - Spatio-temporal intermittency
UR - http://www.scopus.com/inward/record.url?scp=79951977709&partnerID=8YFLogxK
U2 - 10.1149/1.3507263
DO - 10.1149/1.3507263
M3 - Article
AN - SCOPUS:79951977709
VL - 158
SP - B44-B53
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 1
ER -