Abstract
The effect of yttria-stabilized zirconia (YSZ) doping on Cr deposition at a Pt-electrode/YSZ-electrolyte interface was investigated. Comparison between undoped and Mn-doped YSZ electrolyte surfaces after cathodic polarization for 25 h in moist air at 800°C in the presence of chromia indicated that the presence of Mn in the electrolyte significantly enhances Cr deposition at the electrode/electrolyte interface. Impedance spectroscopy results showed that with a Mn-doped YSZ electrolyte the electrode polarization resistance decreased significantly with polarization time, which was attributed to the increase in the three-phase boundary length by the p-type semiconducting chromia deposits.
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