The CO poisoning effect in PEMFCs operational at temperatures up to 200 degrees C

Publication: Research - peer-reviewJournal article – Annual report year: 2003

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The CO poisoning effect in PEMFCs operational at temperatures up to 200 degrees C. / Li, Qingfeng; He, Ronghuan; Gao, Ji-An; Jensen, Jens Oluf; Bjerrum, Niels.

In: Electrochemical Society. Journal, Vol. 150, No. 12, 2003, p. A1599-A1605.

Publication: Research - peer-reviewJournal article – Annual report year: 2003

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Li, Qingfeng; He, Ronghuan; Gao, Ji-An; Jensen, Jens Oluf; Bjerrum, Niels / The CO poisoning effect in PEMFCs operational at temperatures up to 200 degrees C.

In: Electrochemical Society. Journal, Vol. 150, No. 12, 2003, p. A1599-A1605.

Publication: Research - peer-reviewJournal article – Annual report year: 2003

Bibtex

@article{37948e27e04f4dd5833dee666b1d678d,
title = "The CO poisoning effect in PEMFCs operational at temperatures up to 200 degrees C",
publisher = "Electrochemical Society, Inc.",
author = "Qingfeng Li and Ronghuan He and Ji-An Gao and Jensen, {Jens Oluf} and Niels Bjerrum",
note = "Copyright The Electrochemical Society, Inc. [2003]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).",
year = "2003",
doi = "10.1149/1.1619984",
volume = "150",
number = "12",
pages = "A1599--A1605",
journal = "Electrochemical Society. Journal",
issn = "0013-4651",

}

RIS

TY - JOUR

T1 - The CO poisoning effect in PEMFCs operational at temperatures up to 200 degrees C

A1 - Li,Qingfeng

A1 - He,Ronghuan

A1 - Gao,Ji-An

A1 - Jensen,Jens Oluf

A1 - Bjerrum,Niels

AU - Li,Qingfeng

AU - He,Ronghuan

AU - Gao,Ji-An

AU - Jensen,Jens Oluf

AU - Bjerrum,Niels

PB - Electrochemical Society, Inc.

PY - 2003

Y1 - 2003

N2 - The CO poisoning effect on carbon-supported platinum catalysts (at a loading of 0.5 mg Pt/cm(2) per electrode! in polymer electrolyte membrane fuel cells (PEMFCs) has been investigated in a temperature range from 125 to 200 degreesC with the phosphoric acid-doped polybenzimidazole membranes as electrolyte. The effect is very temperature-dependent and can be sufficiently suppressed at elevated temperature. By defining the CO tolerance as a voltage loss less than 10 mV, it is evaluated that 3% CO in hydrogen can be tolerated at current densities up to 0.8 A/cm(2) at 200 degreesC, while at 125 degreesC 0.1% CO in hydrogen can be tolerated at current densities lower than 0.3 A/cm(2). For comparison, the tolerance is only 0.0025% CO (25 ppm) at 80 degreesC at current densities up to 0.2 A/cm(2). The relative anode activity for hydrogen oxidation was calculated as a function of the CO concentration and temperature. The effect of CO2 in hydrogen was also studied. At 175 degreesC, 25% CO2 in the fuel stream showed only the dilution effect. (C) 2003 The Electrochemical Society.

AB - The CO poisoning effect on carbon-supported platinum catalysts (at a loading of 0.5 mg Pt/cm(2) per electrode! in polymer electrolyte membrane fuel cells (PEMFCs) has been investigated in a temperature range from 125 to 200 degreesC with the phosphoric acid-doped polybenzimidazole membranes as electrolyte. The effect is very temperature-dependent and can be sufficiently suppressed at elevated temperature. By defining the CO tolerance as a voltage loss less than 10 mV, it is evaluated that 3% CO in hydrogen can be tolerated at current densities up to 0.8 A/cm(2) at 200 degreesC, while at 125 degreesC 0.1% CO in hydrogen can be tolerated at current densities lower than 0.3 A/cm(2). For comparison, the tolerance is only 0.0025% CO (25 ppm) at 80 degreesC at current densities up to 0.2 A/cm(2). The relative anode activity for hydrogen oxidation was calculated as a function of the CO concentration and temperature. The effect of CO2 in hydrogen was also studied. At 175 degreesC, 25% CO2 in the fuel stream showed only the dilution effect. (C) 2003 The Electrochemical Society.

UR - http://dx.doi.org/10.1149/1.1619984

U2 - 10.1149/1.1619984

DO - 10.1149/1.1619984

JO - Electrochemical Society. Journal

JF - Electrochemical Society. Journal

SN - 0013-4651

IS - 12

VL - 150

SP - A1599-A1605

ER -