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Energies 2012, 5(12), 5363-5371; doi:10.3390/en5125363

Electrodeposition of a Au-Dy2O3 Composite Solid Oxide Fuel Cell Catalyst from Eutectic Urea/Choline Chloride Ionic Liquid

Department of Innovation Engineering, University of Salento, via Monteroni, Lecce 73100, Italy
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Received: 15 August 2012 / Revised: 20 October 2012 / Accepted: 7 December 2012 / Published: 19 December 2012
(This article belongs to the Special Issue Hydrogen Energy and Fuel Cells)

Abstract

In this research we have fabricated and tested Au/Dy2O3 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 Dy2O3 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 H2 oxidation and O2 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 Dy2O3 and an even better cathodic performance.
Keywords: Dy; Au; Dy2O3; electrodeposition; composite; solid oxide fuel cell (SOFC); urea; choline chloride; ionic liquid Dy; Au; Dy2O3; electrodeposition; composite; solid oxide fuel cell (SOFC); urea; choline chloride; ionic liquid
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Mele, C.; Bozzini, B. Electrodeposition of a Au-Dy2O3 Composite Solid Oxide Fuel Cell Catalyst from Eutectic Urea/Choline Chloride Ionic Liquid. Energies 2012, 5, 5363-5371.

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