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Electrodeposition of a Au-Dy 2 O 3 Composite Solid Oxide Fuel Cell Catalyst from Eutectic Urea/Choline Chloride Ionic Liquid

Author

Listed:
  • Claudio Mele

    (Department of Innovation Engineering, University of Salento, via Monteroni, Lecce 73100, Italy)

  • Benedetto Bozzini

    (Department of Innovation Engineering, University of Salento, via Monteroni, Lecce 73100, Italy)

Abstract

In this research we have fabricated and tested Au/Dy 2 O 3 composites for applications as Solid Oxide Fuel Cell (SOFC) electrocatalysts. The material was obtained by a process involving electrodeposition of a Au-Dy alloy from a urea/choline chloride ionic liquid electrolyte, followed by selective oxidation of Dy to Dy 2 O 3 in air at high temperature. The electrochemical kinetics of the electrodeposition bath were studied by cyclic voltammetry, whence optimal electrodeposition conditions were identified. The heat-treated material was characterised from the morphological (scanning electron microscopy), compositional (X-ray fluorescence spectroscopy) and structural (X-ray diffractometry) points of view. The electrocatalytic activity towards H 2 oxidation and O 2 reduction was tested at 650 °C by electrochemical impedance spectrometry. Our composite electrodes exhibit an anodic activity that compares favourably with the only literature result available at the time of this writing for Dy 2 O 3 and an even better cathodic performance.

Suggested Citation

  • Claudio Mele & Benedetto Bozzini, 2012. "Electrodeposition of a Au-Dy 2 O 3 Composite Solid Oxide Fuel Cell Catalyst from Eutectic Urea/Choline Chloride Ionic Liquid," Energies, MDPI, vol. 5(12), pages 1-9, December.
    • Handle: RePEc:gam:jeners:v:5:y:2012:i:12:p:5363-5371:d:22329
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