Long-term contamination effect of iron ions on cell performance degradation of proton exchange membrane water electrolyser

Research output: Contribution to journalJournal articleResearchpeer-review

1 Citation (Scopus)

Abstract

It is known that impurities, especially metal ions in feed water, can cause significant performance degradation of proton exchange membrane water electrolyser (PEM WE). In this study, the long-term effect of iron ion contamination on single cell performance is investigated by introducing Fe2 (SO4)3 into deionized water fed in PEM WE. Electrochemical impedance spectroscopy (EIS) and polarization curve results were recorded during the test. Results show that with 1 parts per million (ppm, molar ratio) Fe3+ contamination at the test condition of 0.5 A/cm2 and 60 °C, the cell performance degrades severely, especially the charge and mass transfer resistances increase significantly with time. Resistance values obtained through fitting the experiment data with equivalent circuit model were used to better describe the results. The results of Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscopy (EDX) test illustrate that the existence of Fe3+ promote the Fenton reaction, leading to the production of chemical radicals, which degrade the membrane and anode catalyst layer severely.
Original languageEnglish
Article number226755
JournalJournal of Power Sources
Volume434
Pages (from-to)1-7
Number of pages7
ISSN0378-7753
DOIs
Publication statusPublished - Sep 2019

Fingerprint

Protons
Ion exchange
contamination
Contamination
Iron
Ions
degradation
membranes
Membranes
iron
Degradation
protons
Water
cells
water
ions
Deionized water
Electrochemical impedance spectroscopy
long term effects
Equivalent circuits

Keywords

  • Fe contamination
  • Fluoride emission
  • Long-term operation
  • MEA degradation mechanism
  • PEM water electrolysis

Cite this

@article{9d522188aa4b4b5d8a30c410ba63c16e,
title = "Long-term contamination effect of iron ions on cell performance degradation of proton exchange membrane water electrolyser",
abstract = "It is known that impurities, especially metal ions in feed water, can cause significant performance degradation of proton exchange membrane water electrolyser (PEM WE). In this study, the long-term effect of iron ion contamination on single cell performance is investigated by introducing Fe2 (SO4)3 into deionized water fed in PEM WE. Electrochemical impedance spectroscopy (EIS) and polarization curve results were recorded during the test. Results show that with 1 parts per million (ppm, molar ratio) Fe3+ contamination at the test condition of 0.5 A/cm2 and 60 °C, the cell performance degrades severely, especially the charge and mass transfer resistances increase significantly with time. Resistance values obtained through fitting the experiment data with equivalent circuit model were used to better describe the results. The results of Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscopy (EDX) test illustrate that the existence of Fe3+ promote the Fenton reaction, leading to the production of chemical radicals, which degrade the membrane and anode catalyst layer severely.",
keywords = "Fe contamination, Fluoride emission, Long-term operation, MEA degradation mechanism, PEM water electrolysis",
author = "Na Li and Araya, {Samuel Simon} and K{\ae}r, {S{\o}ren Knudsen}",
year = "2019",
month = "9",
doi = "10.1016/j.jpowsour.2019.226755",
language = "English",
volume = "434",
pages = "1--7",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

Long-term contamination effect of iron ions on cell performance degradation of proton exchange membrane water electrolyser. / Li, Na; Araya, Samuel Simon; Kær, Søren Knudsen.

In: Journal of Power Sources, Vol. 434, 226755, 09.2019, p. 1-7.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Long-term contamination effect of iron ions on cell performance degradation of proton exchange membrane water electrolyser

AU - Li, Na

AU - Araya, Samuel Simon

AU - Kær, Søren Knudsen

PY - 2019/9

Y1 - 2019/9

N2 - It is known that impurities, especially metal ions in feed water, can cause significant performance degradation of proton exchange membrane water electrolyser (PEM WE). In this study, the long-term effect of iron ion contamination on single cell performance is investigated by introducing Fe2 (SO4)3 into deionized water fed in PEM WE. Electrochemical impedance spectroscopy (EIS) and polarization curve results were recorded during the test. Results show that with 1 parts per million (ppm, molar ratio) Fe3+ contamination at the test condition of 0.5 A/cm2 and 60 °C, the cell performance degrades severely, especially the charge and mass transfer resistances increase significantly with time. Resistance values obtained through fitting the experiment data with equivalent circuit model were used to better describe the results. The results of Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscopy (EDX) test illustrate that the existence of Fe3+ promote the Fenton reaction, leading to the production of chemical radicals, which degrade the membrane and anode catalyst layer severely.

AB - It is known that impurities, especially metal ions in feed water, can cause significant performance degradation of proton exchange membrane water electrolyser (PEM WE). In this study, the long-term effect of iron ion contamination on single cell performance is investigated by introducing Fe2 (SO4)3 into deionized water fed in PEM WE. Electrochemical impedance spectroscopy (EIS) and polarization curve results were recorded during the test. Results show that with 1 parts per million (ppm, molar ratio) Fe3+ contamination at the test condition of 0.5 A/cm2 and 60 °C, the cell performance degrades severely, especially the charge and mass transfer resistances increase significantly with time. Resistance values obtained through fitting the experiment data with equivalent circuit model were used to better describe the results. The results of Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscopy (EDX) test illustrate that the existence of Fe3+ promote the Fenton reaction, leading to the production of chemical radicals, which degrade the membrane and anode catalyst layer severely.

KW - Fe contamination

KW - Fluoride emission

KW - Long-term operation

KW - MEA degradation mechanism

KW - PEM water electrolysis

UR - http://www.scopus.com/inward/record.url?scp=85067796547&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2019.226755

DO - 10.1016/j.jpowsour.2019.226755

M3 - Journal article

AN - SCOPUS:85067796547

VL - 434

SP - 1

EP - 7

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

M1 - 226755

ER -