Analysis of spatio-temporal pattern formation in a PEM fuel cell with Pt/Ru anode exposed to H₂ /CO mixtures

verfasst von

Sebastian Kirsch, Richard Hanke-Rauschenbach, Kai Sundmacher

Abstract

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

Externe Organisation(en)

Max-Planck-Institut für Dynamik komplexer technischer Systeme
Otto-von-Guericke-Universität Magdeburg

Typ

Artikel

Journal

Journal of the Electrochemical Society

Band

158

Seiten

B44-B53

ISSN

0013-4651

Publikationsdatum

2011

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/10.1149/1.3507263 (Zugang: Unbekannt)