Autonomous potential oscillations at the Pt anode of a polymer electrolyte membrane fuel cell under CO poisoning

被引：42

作者：

Kadyk, Thomas ^{[1
,2
]}

Kirsch, Sebastian ^{[1
]}

Hanke-Rauschenbach, Richard ^{[1
]}

Sundmacher, Kai ^{[1
,2
]}

机构：

[1] Max Planck Inst Dynam Complex Tech Syst, D-39106 Magdeburg, Germany

[2] Univ Magdeburg, D-39106 Magdeburg, Germany

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 28期

关键词：

Polymer electrolyte membrane fuel cell; Carbon monoxide; Oscillations; Platinum; Bifurcation; HYDROGEN OXIDATION REACTION; ELECTROCHEMICAL IMPEDANCE; PATTERN-FORMATION; CARBON-MONOXIDE; H-2/CO MIXTURES; ELECTROOXIDATION; PLATINUM; ASSEMBLIES; REFORMATE; TOLERANCE;

D O I：

10.1016/j.electacta.2011.05.005

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In a PEMFC with Pt anode under CO poisoning, the possibility and conditions for the occurrence of autonomous potential oscillations in galvanostatic operation were investigated. A special experimental setup consisting of a differential H-2/H-2 cell was used, in order to eliminate the masking effect of the cathode and to avoid spatial distributions along the channel. The influence of CO concentration and temperature on the behaviour of the oscillations was analysed. A model developed for cells with PtRu catalyst was adapted to fit the experimental data. The comparison of the original and adapted parameter set revealed lower water dissociation and CO oxidation constants at Pt. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：10593 / 10602

页数：10

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