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Proceedings 2017, 1(4), 465; doi:10.3390/proceedings1040465

Study of a Layered Au, Pt-YSZ Mixed-Potential Sensing Electrode by ESEM, XRD and GD-OES with Relation to Its Electrochemical Behaviour

1
Institute for Sensor and Information Systems, Karlsruhe University of Applied Sciences, 76133 Karlsruhe, Germany
2
Institute of Functional Interfaces, Karlsruhe Institute of Technology (KIT), 76344 Karlsruhe, Germany
3
HORIBA (China) Trading Co., Ltd., Shanghai 200335, China
4
Department of Chemistry and Food Chemistry, Dresden University of Technology, 01069 Dresden, Germany
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 22 August 2017
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Abstract

Morphological and structural properties of layered Au, Pt-YSZ mixed-potential gas sensing electrodes (APE) prepared under different temperature treatments were studied by environmental scanning electron microscope (ESEM) and glow-discharge optical emission spectroscopy (GD-OES), and correlated with open-circuit potential (OCP) and cyclic voltammetry (CV) measurements under gas exposures at elevated temperatures. The OCP response of the APE sintered at 1050 °C is clearly higher than that of the APE sintered at 850 °C, and can be well correlated with a smaller oxygen reduction reaction (ORR) observed in the related CV diagrams. Moreover, a transition from the charge transfer reaction kinetics to the diffusional transport controlled mixed-potential formation was found between 550 °C and 650 °C.
Keywords: solid electrolyte gas sensor; mixed potential; Au, Pt-YSZ electrode; OCP; CV; ESEM; GD-OES solid electrolyte gas sensor; mixed potential; Au, Pt-YSZ electrode; OCP; CV; ESEM; GD-OES
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, X.; Kohler, H.; Schwotzer, M.; Wu, Y.; Guth, U. Study of a Layered Au, Pt-YSZ Mixed-Potential Sensing Electrode by ESEM, XRD and GD-OES with Relation to Its Electrochemical Behaviour. Proceedings 2017, 1, 465.

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