Electrochemical Investigation of Nickel Pattern Electrodes in H-2/H2O and CO/CO2 Atmospheres
(2010) In Journal of the Electrochemical Society 157(11). p.1588-1596- Abstract
- In this study, nickel pattern electrodes were electrochemically investigated in a three-electrode setup, operating both with H-2/H2O and CO/CO2 atmospheres. Heating introduced structural differences in the nickel layer among the pattern electrodes, which appear to affect the electrode performance. Both dense and porous nickel pattern electrodes were formed by heating. Holes appeared in the nickel layer of the porous pattern electrodes, where the open cavity triple phase boundaries exhibited different limiting processes than open triple phase boundary electrodes of the dense electrode. As the temperature was raised in the experiment, the electrodes stabilized, with a degraded behavior that seemed to be strongly coupled to the structural... (More)
- In this study, nickel pattern electrodes were electrochemically investigated in a three-electrode setup, operating both with H-2/H2O and CO/CO2 atmospheres. Heating introduced structural differences in the nickel layer among the pattern electrodes, which appear to affect the electrode performance. Both dense and porous nickel pattern electrodes were formed by heating. Holes appeared in the nickel layer of the porous pattern electrodes, where the open cavity triple phase boundaries exhibited different limiting processes than open triple phase boundary electrodes of the dense electrode. As the temperature was raised in the experiment, the electrodes stabilized, with a degraded behavior that seemed to be strongly coupled to the structural changes in the electrode. It was possible to compare literature results with high temperature impedance measurements in H-2/H2O presented here, while new results at lower temperatures in H-2/H2O are also presented. Impedance spectroscopy measurements were performed, and the gas dependence of the polarization resistance was observed as the mixture ratios and temperatures were varied in both atmospheres. A positive relation between the polarization resistance and the partial pressure of CO was determined for the dense nickel pattern electrode, which agrees with previous results using nickel point electrodes. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3484091] All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1752133
- author
- Ehn, Andreas LU ; Hogh, J. ; Graczyk, Mariusz LU ; Norrman, K. ; Montelius, Lars LU ; Linne, M. and Mogensen, M.
- organization
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the Electrochemical Society
- volume
- 157
- issue
- 11
- pages
- 1588 - 1596
- publisher
- Electrochemical Society
- external identifiers
-
- wos:000283857900037
- scopus:77957721702
- ISSN
- 0013-4651
- DOI
- 10.1149/1.3484091
- language
- English
- LU publication?
- yes
- id
- 3c75aef3-7b1e-4c5d-9da9-6cfe9e7b58cc (old id 1752133)
- date added to LUP
- 2016-04-01 10:02:17
- date last changed
- 2023-08-30 16:08:55
@article{3c75aef3-7b1e-4c5d-9da9-6cfe9e7b58cc,
abstract = {{In this study, nickel pattern electrodes were electrochemically investigated in a three-electrode setup, operating both with H-2/H2O and CO/CO2 atmospheres. Heating introduced structural differences in the nickel layer among the pattern electrodes, which appear to affect the electrode performance. Both dense and porous nickel pattern electrodes were formed by heating. Holes appeared in the nickel layer of the porous pattern electrodes, where the open cavity triple phase boundaries exhibited different limiting processes than open triple phase boundary electrodes of the dense electrode. As the temperature was raised in the experiment, the electrodes stabilized, with a degraded behavior that seemed to be strongly coupled to the structural changes in the electrode. It was possible to compare literature results with high temperature impedance measurements in H-2/H2O presented here, while new results at lower temperatures in H-2/H2O are also presented. Impedance spectroscopy measurements were performed, and the gas dependence of the polarization resistance was observed as the mixture ratios and temperatures were varied in both atmospheres. A positive relation between the polarization resistance and the partial pressure of CO was determined for the dense nickel pattern electrode, which agrees with previous results using nickel point electrodes. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3484091] All rights reserved.}},
author = {{Ehn, Andreas and Hogh, J. and Graczyk, Mariusz and Norrman, K. and Montelius, Lars and Linne, M. and Mogensen, M.}},
issn = {{0013-4651}},
language = {{eng}},
number = {{11}},
pages = {{1588--1596}},
publisher = {{Electrochemical Society}},
series = {{Journal of the Electrochemical Society}},
title = {{Electrochemical Investigation of Nickel Pattern Electrodes in H-2/H2O and CO/CO2 Atmospheres}},
url = {{http://dx.doi.org/10.1149/1.3484091}},
doi = {{10.1149/1.3484091}},
volume = {{157}},
year = {{2010}},
}