The electro-oxidation of H₂, CO in a model PEM fuel cell

Oscillations, chaos, pulses

verfasst von

Sebastian Kirsch, Richard Hanke-Rauschenbach, Bianka Stein, Ralf Kraume, Kai Sundmacher

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.

Externe Organisation(en)

Max-Planck-Institut für Dynamik komplexer technischer Systeme
S++ Simulation Services
Otto-von-Guericke-Universität Magdeburg

Typ

Artikel

Journal

Journal of the Electrochemical Society

Band

160

Seiten

F436-F446

ISSN

0013-4651

Publikationsdatum

2013

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Erneuerbare Energien, Nachhaltigkeit und Umwelt, Oberflächen, Beschichtungen und Folien, Elektrochemie, Werkstoffchemie

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1149/2.002306jes (Zugang: Unbekannt)