Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst

I. C. Halalay, Belabbes Merzougui, A. M. Mance

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Performance of the perfluorinated sulfonic acid polymer electrolyte membrane in PEM fuel cells degrades through a multistep process. Hydroxyl radicals, formed via crossover gases or reactions of hydrogen peroxide with Fenton-active contaminants, generate hydrogen radicals that attack the backbone of Nafion® causing the release of fluoride anions. Fluoride anions promote corrosion of the plates and catalyst, with the release of transition metals in to the fuel cell environment. Transition metal ions catalyze the hydroxyl attack on the Nafion® backbone, resulting in further release of fluoride anions. We present here a new approach for mitigating the membrane degradation and for increasing the overall durability of the fuel cell by interfering with three steps of the membrane degradation cycle: the use of (i) hydroquinones to neutralize hydroxyl radicals, (ii) aza-crowns for sequestering fluoride anions, and (iii) crown ethers to sequester base metal cations.

Original languageEnglish
Title of host publicationECS Transactions
Pages969-981
Number of pages13
Volume16
Edition2 PART 1
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI
Duration: 12 Oct 200817 Oct 2008

Other

OtherProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting
CityHonolulu, HI
Period12/10/0817/10/08

Fingerprint

Cell membranes
Fuel cells
Negative ions
Catalysts
Membranes
Transition metals
Degradation
Crown ethers
Hydrogen peroxide
Metal ions
Durability
Positive ions
Electrolytes
Impurities
Corrosion
Hydrogen
Acids
Polymers
Metals
Gases

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Halalay, I. C., Merzougui, B., & Mance, A. M. (2008). Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst. In ECS Transactions (2 PART 1 ed., Vol. 16, pp. 969-981) https://doi.org/10.1149/1.2981937

Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst. / Halalay, I. C.; Merzougui, Belabbes; Mance, A. M.

ECS Transactions. Vol. 16 2 PART 1. ed. 2008. p. 969-981.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Halalay, IC, Merzougui, B & Mance, AM 2008, Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst. in ECS Transactions. 2 PART 1 edn, vol. 16, pp. 969-981, Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting, Honolulu, HI, 12/10/08. https://doi.org/10.1149/1.2981937
Halalay IC, Merzougui B, Mance AM. Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst. In ECS Transactions. 2 PART 1 ed. Vol. 16. 2008. p. 969-981 https://doi.org/10.1149/1.2981937
Halalay, I. C. ; Merzougui, Belabbes ; Mance, A. M. / Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst. ECS Transactions. Vol. 16 2 PART 1. ed. 2008. pp. 969-981
@inproceedings{565bc99880f74f32806171c146a113eb,
title = "Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst",
abstract = "Performance of the perfluorinated sulfonic acid polymer electrolyte membrane in PEM fuel cells degrades through a multistep process. Hydroxyl radicals, formed via crossover gases or reactions of hydrogen peroxide with Fenton-active contaminants, generate hydrogen radicals that attack the backbone of Nafion{\circledR} causing the release of fluoride anions. Fluoride anions promote corrosion of the plates and catalyst, with the release of transition metals in to the fuel cell environment. Transition metal ions catalyze the hydroxyl attack on the Nafion{\circledR} backbone, resulting in further release of fluoride anions. We present here a new approach for mitigating the membrane degradation and for increasing the overall durability of the fuel cell by interfering with three steps of the membrane degradation cycle: the use of (i) hydroquinones to neutralize hydroxyl radicals, (ii) aza-crowns for sequestering fluoride anions, and (iii) crown ethers to sequester base metal cations.",
author = "Halalay, {I. C.} and Belabbes Merzougui and Mance, {A. M.}",
year = "2008",
doi = "10.1149/1.2981937",
language = "English",
isbn = "9781566776486",
volume = "16",
pages = "969--981",
booktitle = "ECS Transactions",
edition = "2 PART 1",

}

TY - GEN

T1 - Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst

AU - Halalay, I. C.

AU - Merzougui, Belabbes

AU - Mance, A. M.

PY - 2008

Y1 - 2008

N2 - Performance of the perfluorinated sulfonic acid polymer electrolyte membrane in PEM fuel cells degrades through a multistep process. Hydroxyl radicals, formed via crossover gases or reactions of hydrogen peroxide with Fenton-active contaminants, generate hydrogen radicals that attack the backbone of Nafion® causing the release of fluoride anions. Fluoride anions promote corrosion of the plates and catalyst, with the release of transition metals in to the fuel cell environment. Transition metal ions catalyze the hydroxyl attack on the Nafion® backbone, resulting in further release of fluoride anions. We present here a new approach for mitigating the membrane degradation and for increasing the overall durability of the fuel cell by interfering with three steps of the membrane degradation cycle: the use of (i) hydroquinones to neutralize hydroxyl radicals, (ii) aza-crowns for sequestering fluoride anions, and (iii) crown ethers to sequester base metal cations.

AB - Performance of the perfluorinated sulfonic acid polymer electrolyte membrane in PEM fuel cells degrades through a multistep process. Hydroxyl radicals, formed via crossover gases or reactions of hydrogen peroxide with Fenton-active contaminants, generate hydrogen radicals that attack the backbone of Nafion® causing the release of fluoride anions. Fluoride anions promote corrosion of the plates and catalyst, with the release of transition metals in to the fuel cell environment. Transition metal ions catalyze the hydroxyl attack on the Nafion® backbone, resulting in further release of fluoride anions. We present here a new approach for mitigating the membrane degradation and for increasing the overall durability of the fuel cell by interfering with three steps of the membrane degradation cycle: the use of (i) hydroquinones to neutralize hydroxyl radicals, (ii) aza-crowns for sequestering fluoride anions, and (iii) crown ethers to sequester base metal cations.

UR - http://www.scopus.com/inward/record.url?scp=63149147873&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=63149147873&partnerID=8YFLogxK

U2 - 10.1149/1.2981937

DO - 10.1149/1.2981937

M3 - Conference contribution

SN - 9781566776486

VL - 16

SP - 969

EP - 981

BT - ECS Transactions

ER -