<div class="csl-bib-body">
<div class="csl-entry">Nenning, A., Volgger, L., Miller, E., Mogni, L., Barnett, S., & Fleig, J. (2017). The Electrochemical Properties of Sr(Ti,Fe)O3-δ for Anodes in Solid Oxide Fuel Cells. <i>Journal of The Electrochemical Society</i>, <i>164</i>(4), 364–371. https://doi.org/10.1149/2.1271704jes</div>
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Reduction-stable mixed ionic and electronic conductors such as Sr(Ti,Fe)O3-δ (STF) are promising materials for application in anodes of solid oxide fuel cells. The defect chemistry of STF and its properties as solid oxide fuel cell (SOFC) cathode have been studied thoroughly, while mechanistic investigations of its electrochemical properties as SOFC anode material are still scarce. In this study, thin film model electrodes of STF with 30% and 70% Fe content were investigated in H2+H2O atmosphere by electrochemical impedance spectroscopy. Lithographically patterned thin film Pt current collectors were applied on top or beneath the STF thin films to compensate for the low electronic conductivity under reducing conditions. Oxygen exchange resistances, electronic and ionic conductivities and chemical capacitances were quantified and discussed in a defect chemical model. Increasing Fe content increases the electro-catalytic activity of the STF surface as well as the electronic and ionic conductivity. Current collectors on top also increase the electrochemical activity due to a highly active Pt-atmosphere-STF triple phase boundary. Furthermore, the electrochemical activity depends decisively on the H2:H2O mixing ratio and the polarization. Fe0 nanoparticles may evolve on the surface in hydrogen rich atmospheres and increase the hydrogen adsorption rate.
en
dc.description.sponsorship
Fonds zur Förderung der Wissenschaftlichen Forschung
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dc.language
English
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dc.language.iso
en
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dc.publisher
The Electrochemical Society (ECS)
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dc.relation.ispartof
Journal of The Electrochemical Society
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dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
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dc.subject
anode
en
dc.subject
defect chemistry
en
dc.subject
electrochemistry
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dc.subject
impedance
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dc.subject
mixed conductor
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dc.subject
SOFC
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dc.subject
solid oxide fuel cell
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dc.subject
thin film
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dc.subject
triple-phase boundary
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dc.title
The Electrochemical Properties of Sr(Ti,Fe)O3-δ for Anodes in Solid Oxide Fuel Cells
en
dc.type
Article
en
dc.type
Artikel
de
dc.rights.license
Creative Commons Namensnennung 4.0 International
de
dc.rights.license
Creative Commons Attribution 4.0 International
en
dc.contributor.affiliation
Northwestern University, Evanston, USA
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dc.contributor.affiliation
Centro Atómico Bariloche, Argentina
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dc.contributor.affiliation
Northwestern University, Evanston, USA
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dc.description.startpage
364
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dc.description.endpage
371
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dc.relation.grantno
P4509-N16
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dc.relation.grantno
W1243-N16
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dcterms.dateSubmitted
2016-11-28
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dc.rights.holder
The Author(s) 2017
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dc.type.category
Original Research Article
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tuw.container.volume
164
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tuw.container.issue
4
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tuw.journal.peerreviewed
true
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tuw.peerreviewed
true
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tuw.version
vor
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dcterms.isPartOf.title
Journal of The Electrochemical Society
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tuw.publication.orgunit
E164 - Institut für Chemische Technologien und Analytik
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tuw.publisher.doi
10.1149/2.1271704jes
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dc.identifier.eissn
1945-7111
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dc.identifier.libraryid
AC15557363
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dc.description.numberOfPages
8
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dc.identifier.urn
urn:nbn:at:at-ubtuw:3-8239
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tuw.author.orcid
0000-0001-9313-3731
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tuw.author.orcid
0000-0002-8401-6717
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dc.rights.identifier
CC BY 4.0
de
dc.rights.identifier
CC BY 4.0
en
wb.sci
true
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item.fulltext
with Fulltext
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open
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item.languageiso639-1
en
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application/pdf
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item.openairetype
research article
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Publications
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Open Access
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item.openairecristype
http://purl.org/coar/resource_type/c_2df8fbb1
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crisitem.author.dept
E164-04-3 - Forschungsgruppe Festkörperionik
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crisitem.author.dept
E164-01-2 - Forschungsgruppe Oberflächen-, Spurenanalytik und Chemometrie