Proceedings 2017, 1(4), 465; https://doi.org/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
(This article belongs to the Proceedings of Eurosensors 2017)
PDF [818 KB, uploaded 22 August 2017]
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
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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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