Experimental and modelling studies of CO poisoning in PEM fuel cells

Farrell, Connor; Gardner, C.L.; Ternan, Marten

doi:10.1016/j.jpowsour.2007.07.006

Cited by 89 publications

(54 citation statements)

References 31 publications

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“…The adsorbed CO is then electrochemically oxidised on the anode catalyst surface above a certain limiting overpotential. This in turn releases the active sites earlier occupied by CO [10,[20][21][22][23]. The simple dynamic modelling proposed by Zhang and Datta [10] was mainly based on this mechanism and was able to successfully describe most experimental observations.…”

Section: The Influence Of the Current Density On Potential Oscillationsmentioning

confidence: 99%

Dynamic Behavior of a PEM Fuel Cell During Electrochemical CO Oxidation on a PtRu Anode

et al. 2008

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The dynamic behaviour of a single PEM fuel cell (PEMFC) with a PtRu/C anode catalyst using CO containing H 2 as anode feed was investigated at ambient temperature. The autonomous oscillations of the cell potential were observed during the galvanostatic operation with hydrogen anode feed containing CO up to 1000 ppm. The oscillations were ascribed to the coupling of the adsorption of CO (the poisoning step) and the subsequent electrochemical oxidation of CO (the regeneration step) on the anode catalyst. The oscillations were dependent on the CO concentration of the feed gas and the applied current density. Furthermore, it was found that with CO containing feed gas, the time average power output was remarkably higher under potential oscillatory conditions in the galvanostatic mode than during potentiostatic operation. Accompanying these self-sustained potential oscillations, oscillation patterns of the anode outlet CO concentration were also detected at low current density (\100 mA/cm 2 ). The online measurements of the anode outlet CO concentrations revealed that CO in the anode CO/H 2 feed was partially electrochemically removed during galvanostatic operation. More than 90% CO conversion was obtained at the current densities above 125 mA/cm 2 with low feed flow rates (100-200 mL/min).

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Section: The Influence Of the Current Density On Potential Oscillationsmentioning

confidence: 99%

Dynamic Behavior of a PEM Fuel Cell During Electrochemical CO Oxidation on a PtRu Anode

et al. 2008

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“…The potential oscillations, instabilities and steadystate multiplies have also been observed and simulated in PEMFCs, which are resulted generally from dynamic CO poisoning/reactivating, mass transfer limitation, and/or reactant concentration gradients. [16][17][18][19][20][21][22][23][24][25][26][27] However, there is still limited work done so far on the potential oscillations in the PEMFCs with CO-containing H 2 feed for understanding the complicated processes.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous oscillations of cell voltage, power density, and anode exit CO concentration in a PEM fuel cell

Lü¹,

Rihko‐Struckmann²,

Sundmacher³

2011

Phys. Chem. Chem. Phys.

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The spontaneous oscillations of the cell voltage and output power density of a PEMFC (with PtRu/C anode) using CO-containing H 2 streams as anodic fuels have been observed during galvanostatic operating. It is ascribed to the dynamic coupling of the CO adsorption (poisoning) and the electrochemical CO oxidation (reactivating) processes in the anode chamber of the single PEMFC. Accompanying the cell voltage and power density oscillations, the discrete CO concentration oscillations at the anode outlet of the PEMFC were also detected, which directly confirms the electrochemical CO oxidation taking place in the anode chamber during galvanostatic operating.

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“…A study of battlefield air impurities such as benzene, propane, HCN, CNCL, sarin, and sulfur mustard has also been reported [25]. In terms of model development for predicting fuel cell contamination, numerous studies on fuel cell contamination have been conducted, especially for CO contamination [26][27][28][29][30][31][32][33][34][35][36][37]. For fuel-side H 2 S contamination, a kinetic model has been developed to study both transient and steady fuel cell performance [38].…”

Section: Introductionmentioning

confidence: 99%

A general model for air-side proton exchange membrane fuel cell contamination

Shi

Song

et al. 2009

Journal of Power Sources

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. This paper presents a general model for air-side feed stream contamination that has the capability of simulating both transient and steady-state performance of a PEM fuel cell in the presence of air-side feed stream impurities. The model is developed based on the oxygen reduction reaction mechanism, contaminant surface adsorption/desorption, and electrochemical reaction kinetics. The model is then applied to the study of air-side toluene contamination. Experimental data for toluene contamination at four current densities (0.2, 0.5, 0.75 and 1.0 A cm −2 ) and three contamination levels (1, 5 and 10 ppm) were used to validate the model. In addition, it is expected that, with parameter adjustment, this model can also be used to predict performance degradation caused by other air impurities such as nitrogen oxides (NO x ) and sulfur oxides (SO x ). Crown

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Experimental and modelling studies of CO poisoning in PEM fuel cells

Cited by 89 publications

References 31 publications

Dynamic Behavior of a PEM Fuel Cell During Electrochemical CO Oxidation on a PtRu Anode

Dynamic Behavior of a PEM Fuel Cell During Electrochemical CO Oxidation on a PtRu Anode

Spontaneous oscillations of cell voltage, power density, and anode exit CO concentration in a PEM fuel cell

A general model for air-side proton exchange membrane fuel cell contamination

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