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
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
| Original language | English |
|---|---|
| Pages (from-to) | B44-B53 |
| Journal | Journal of the Electrochemical Society |
| Volume | 158 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 |
| Externally published | Yes |
UN Sustainable Development Goals (SDGs)
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry
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