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Redox stability and electrochemical study of nickel doped chromites as anodes for H-2/CH4-fueled solid oxide fuel cells

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Redox stability and electrochemical study of nickel doped chromites as anodes for H-2/CH4-fueled solid oxide fuel cells

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dc.contributor.author Vert Belenguer, Vicente Bernardo es_ES
dc.contributor.author MELO FAUS, FRANCISCO VICENTE es_ES
dc.contributor.author Navarrete Algaba, Laura es_ES
dc.contributor.author Serra Alfaro, José Manuel es_ES
dc.date.accessioned 2020-04-01T07:15:40Z
dc.date.available 2020-04-01T07:15:40Z
dc.date.issued 2012 es_ES
dc.identifier.issn 0926-3373 es_ES
dc.identifier.uri http://hdl.handle.net/10251/139930
dc.description.abstract [EN] The influence of nickel and strontium incorporation in LaCrO3 on the crystalline structure, redox behavior and electrochemical performance by impedance spectroscopy using symmetrical cells has been studied. Namely, the La1-xSrxCr1-yNiyO3-delta (x = 0, 0.15: y = 0.05, 0.1, 0.2) system was investigated. Structural and redox evolution has been monitored by X-ray diffraction in oxidized and reduced samples. Reduced samples kept the initial perovskite structure although metallic nickel nanoparticles were detected on the perovskite grain surface by TEM analysis. The re-oxidized surface did not present nickel particles, suggesting the nickel re-incorporation into perovskite lattice coupled with cation diffusion. The perovskites were tested as SOFC anodes and the polarization resistance depended on the nickel stoichiometry and the reduction temperature. La0.85Sr0.15Cr0.9Ni0.1O3-delta reduced at 800 degrees C showed the lowest polarization resistance, both in hydrogen and methane. In fact this composition showed a 20% methane conversion at 900 degrees C for the methane steam reforming in a fixed bed reactor. Tolerance to redox cycling was proved electrochemically by in situ treatments of La0.85Sr0.15Cr0.9Ni0.1O3-delta electrode. Materials were further analyzed by TPR and XPS (in oxidized and reduced state) in order to identify the possible species involved in the electrocatalytic processes. (C) 2011 Elsevier B.V. All rights reserved. es_ES
dc.description.sponsorship Authors thank funding by the Universidad Politecnica de Valencia (Grant FPI-UPV-2007-06), the Spanish Ministry for Science and Innovation (Project ENE2008-06302) and Generalitat Valenciana (Grant ACOMP2010/223). P. Concepcion has contributed to this work with the XPS measurements. N. Morlanes, S. Climent and M. Algarra are kindly acknowledged for the catalytic experiments. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation MICINN/ENE2008-06302 es_ES
dc.relation UPV/FPI-UPV-2007-06 es_ES
dc.relation.ispartof Applied Catalysis B Environmental es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Anode es_ES
dc.subject Chromites es_ES
dc.subject Redox cycle es_ES
dc.subject Nickel es_ES
dc.subject Nanoparticle es_ES
dc.subject Redox cycling es_ES
dc.subject Methane steam reforming es_ES
dc.title Redox stability and electrochemical study of nickel doped chromites as anodes for H-2/CH4-fueled solid oxide fuel cells es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.apcatb.2011.12.033 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.description.bibliographicCitation Vert Belenguer, VB.; Melo Faus, FV.; Navarrete Algaba, L.; Serra Alfaro, JM. (2012). Redox stability and electrochemical study of nickel doped chromites as anodes for H-2/CH4-fueled solid oxide fuel cells. Applied Catalysis B Environmental. 115:346-356. https://doi.org/10.1016/j.apcatb.2011.12.033 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.apcatb.2011.12.033 es_ES
dc.description.upvformatpinicio 346 es_ES
dc.description.upvformatpfin 356 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 115 es_ES
dc.relation.pasarela S\207565 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
dc.contributor.funder Ministerio de Ciencia e Innovación es_ES
dc.contributor.funder Universitat Politècnica de València es_ES


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