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SE.4 -Effects of Cathodic Polarization on a Layered Au,Pt-YSZ Mixed-potential Gas Sensing Electrode: Studies by steadystate and dynamic electrochemical methods

X. Zhang, H. Kohler, B. Ojha, U. Guth, University Of Vienna, Universitätsring 1, 1010 Vienna, Austria
2018

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Electrochemical characteristics of a layered Au,Pt-YSZ electrode (APE) were studied by open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) measurements. The response of the APE to CO was found to be drastically reduced after 100 days operation in ambient air, which is correlated with a clear change in the shape of the EIS characteristics and a considerably increased polarization resistance (Rp). By applying a cathodic polarization, the reduced response can be almost
more » ... ly restored, and a very similar EIS characteristic as in the initial state is found. This polarization treatment will highly improve stability of the APE and enable applications like flue gas analysis.
doi:10.5162/imcs2018/se.4 fatcat:bf536gcbuzg7rbv24vpysejb54
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X. Zhang, H. Kohler, B. Ojha, U. Guth, University Of Vienna, Universitätsring 1, 1010 Vienna, Austria. "SE.4 -Effects of Cathodic Polarization on a Layered Au,Pt-YSZ Mixed-potential Gas Sensing Electrode: Studies by steadystate and dynamic electrochemical methods." (2018)