Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | F436-F446 |
| Fachzeitschrift | Journal of the Electrochemical Society |
| Jahrgang | 160 |
| Ausgabenummer | 4 |
| Publikationsstatus | Veröffentlicht - 2013 |
| Extern publiziert | Ja |
Abstract
H2, CO electro-oxidation in a model PEM Fuel Cell (PEMFC) is investigated at 37°C with the help of distributed current measurements. The main purpose of the experiments is to verify the formation of spatio-temporal patterns that have been predicted for a PEMFC with straight channels and a H2 evolving cathode. For galvanostatic operation and a high feed flow rate well expressed globally coupled oscillations are found. For decreasing feed flow rate a period doubling bifurcation cascade appears. Potentiostatic control provokes the breakage of the strict phase relation between adjacent oscillators and the appearance of pulses as well as turbulence is seen. The turbulence is enhanced if an oxygen reducing cathode is introduced instead of a hydrogen evolving cathode. All the findings are compared to existing predictions. The study of the patterns is of interest for PEMFC engineers as they directly determine the CO tolerance behavior of the PEMFC.
Schlagwörter
- Electrodissolution, Oscillatory, Formic Acid Fuel Cell, FAFC, CO electrooxidation, Coupled oscillations, Galvanostatic operation, Oxygen reducing cathode, Period doubling bifurcation, Potentiostatic control, Spatiotemporal patterns, Straight channel
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 160, Nr. 4, 2013, S. F436-F446.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - The electro-oxidation of H2, CO in a model PEM fuel cell
T2 - Oscillations, chaos, pulses
AU - Kirsch, Sebastian
AU - Hanke-Rauschenbach, Richard
AU - Stein, Bianka
AU - Kraume, Ralf
AU - Sundmacher, Kai
N1 - Copyright: Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013
Y1 - 2013
N2 - H2, CO electro-oxidation in a model PEM Fuel Cell (PEMFC) is investigated at 37°C with the help of distributed current measurements. The main purpose of the experiments is to verify the formation of spatio-temporal patterns that have been predicted for a PEMFC with straight channels and a H2 evolving cathode. For galvanostatic operation and a high feed flow rate well expressed globally coupled oscillations are found. For decreasing feed flow rate a period doubling bifurcation cascade appears. Potentiostatic control provokes the breakage of the strict phase relation between adjacent oscillators and the appearance of pulses as well as turbulence is seen. The turbulence is enhanced if an oxygen reducing cathode is introduced instead of a hydrogen evolving cathode. All the findings are compared to existing predictions. The study of the patterns is of interest for PEMFC engineers as they directly determine the CO tolerance behavior of the PEMFC.
AB - H2, CO electro-oxidation in a model PEM Fuel Cell (PEMFC) is investigated at 37°C with the help of distributed current measurements. The main purpose of the experiments is to verify the formation of spatio-temporal patterns that have been predicted for a PEMFC with straight channels and a H2 evolving cathode. For galvanostatic operation and a high feed flow rate well expressed globally coupled oscillations are found. For decreasing feed flow rate a period doubling bifurcation cascade appears. Potentiostatic control provokes the breakage of the strict phase relation between adjacent oscillators and the appearance of pulses as well as turbulence is seen. The turbulence is enhanced if an oxygen reducing cathode is introduced instead of a hydrogen evolving cathode. All the findings are compared to existing predictions. The study of the patterns is of interest for PEMFC engineers as they directly determine the CO tolerance behavior of the PEMFC.
KW - Electrodissolution
KW - Oscillatory
KW - Formic Acid Fuel Cell
KW - FAFC
KW - CO electrooxidation
KW - Coupled oscillations
KW - Galvanostatic operation
KW - Oxygen reducing cathode
KW - Period doubling bifurcation
KW - Potentiostatic control
KW - Spatiotemporal patterns
KW - Straight channel
UR - http://www.scopus.com/inward/record.url?scp=84875751675&partnerID=8YFLogxK
U2 - 10.1149/2.002306jes
DO - 10.1149/2.002306jes
M3 - Article
AN - SCOPUS:84875751675
VL - 160
SP - F436-F446
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 4
ER -