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dc.contributor.author
Nenning, Andreas  
dc.contributor.author
Volgger, Lukas  
dc.contributor.author
Miller, Elizabeth  
dc.contributor.author
Mogni, Liliana Verónica  
dc.contributor.author
Barnett, Scott  
dc.contributor.author
Fleig, Jürgen  
dc.date.available
2018-11-28T16:34:26Z  
dc.date.issued
2017-02-18  
dc.identifier.citation
Nenning, Andreas; Volgger, Lukas; Miller, Elizabeth; Mogni, Liliana Verónica; Barnett, Scott; et al.; The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells; Electrochemical Society; Journal of the Electrochemical Society; 164; 4; 18-2-2017; F364-F371  
dc.identifier.issn
0013-4651  
dc.identifier.uri
http://hdl.handle.net/11336/65442  
dc.description.abstract
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.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Electrochemical Society  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Solid Oxide Fuel Cell  
dc.subject
Anode  
dc.subject
Electrochemisty  
dc.subject
Defect Structure  
dc.subject.classification
Recubrimientos y Películas  
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Ingeniería de los Materiales  
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INGENIERÍAS Y TECNOLOGÍAS  
dc.title
The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-10-29T15:10:06Z  
dc.journal.volume
164  
dc.journal.number
4  
dc.journal.pagination
F364-F371  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
Nueva York  
dc.description.fil
Fil: Nenning, Andreas. ETH Zurich; Suiza  
dc.description.fil
Fil: Volgger, Lukas. Vienna University of Technology; Austria  
dc.description.fil
Fil: Miller, Elizabeth. Northwestern University; Estados Unidos  
dc.description.fil
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Barnett, Scott. Northwestern University; Estados Unidos  
dc.description.fil
Fil: Fleig, Jürgen. Vienna University of Technology; Austria  
dc.journal.title
Journal of the Electrochemical Society  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1149/2.1271704jes  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://jes.ecsdl.org/content/164/4/F364