<div class="csl-bib-body">
<div class="csl-entry">Nenning, A., Opitz, A. K., Rameshan, R., Rameshan, C., Klötzer, B., Fleig, J., & Siebenhofer, M. (2023, May 2). <i>Electrochemical in-situ characterisation of the solid oxide cell surface chemistry</i> [Conference Presentation]. Conference of Applied Surface Technology 2023, Wien, Austria. http://hdl.handle.net/20.500.12708/190846</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/190846
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dc.description
Electrochemical in-situ characterisation of the solid oxide cell surface chemistry
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dc.description.abstract
Solid oxide cells are a highly promising technology for efficiently converting between electrical and
chemical energy in either fuel or electrolysis cell operation. These cells operate at high temperatures
of 600-800°C, as they require high oxygen anion mobility. The efficiency and performance of these
cells largely depend on the reaction rate of oxygen exchange reactions at the electrode surfaces.
These reactions include oxygen anion incorporation and release on the air side and water splitting,
H₂ oxidation, or CO₂ splitting on the fuel side. Typical cells use complex porous electrodes with high
but unknown active surface area, which is hardly accessible for surface characterisation.
In this work, we show the results of combined ambient pressure XPS and electrochemical
experiments on model cells with thin film electrodes on which we investigate the material-specific
reaction rate and surface chemistry under operation conditions. A fascinating aspect is that
surface chemistry strongly deviates from the nominal bulk and changes with time and operation
conditions. This talk presents a survey of experiments that show the complex interplay of model cell
operation conditions, surface chemistry and surface reaction rate of fuel and air electrode materials.
Key results include tracking of cation segregation, sulphur impurity-driven degradation by
modification of surface dipoles and the in-situ exsolution of catalytically active Fe nanoparticles.
en
dc.language.iso
en
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dc.subject
APXPS
en
dc.subject
SOFC
en
dc.subject
electrochemistry
en
dc.title
Electrochemical in-situ characterisation of the solid oxide cell surface chemistry
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
Universität Innsbruck, Austria
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dc.rights.holder
Andreas Nenning
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dc.type.category
Conference Presentation
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tuw.researchinfrastructure
Analytical Instrumentation Center
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tuw.researchinfrastructure
Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie
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tuw.researchTopic.id
M2
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tuw.researchTopic.id
M1
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Surfaces and Interfaces
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tuw.researchTopic.value
50
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tuw.researchTopic.value
50
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tuw.publication.orgunit
E164 - Institut für Chemische Technologien und Analytik
