Electrochemical investigation of nickel pattern electrodes in H2/H2O and CO/CO2 atmospheres

A. Ehn, Jens Valdemar Thorvald Høgh, M. Graczyk, Kion Norrman, L. Montelius, M. Linne, Mogens Bjerg Mogensen

    Research output: Contribution to journalJournal articleResearchpeer-review


    In this study, nickel pattern electrodes were electrochemically investigated in a three-electrode setup, operating both with H2 / H2 O 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 H2 / H2 O presented here, while new results at lower temperatures in H2 / H2 O 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. © 2010 The Electrochemical Society.
    Original languageEnglish
    JournalJournal of The Electrochemical Society
    Issue number11
    Pages (from-to)B1588-B1596
    Publication statusPublished - 2010


    • Fuel Cells and Hydrogen
    • Electrolysis


    Dive into the research topics of 'Electrochemical investigation of nickel pattern electrodes in H2/H2O and CO/CO2 atmospheres'. Together they form a unique fingerprint.

    Cite this