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000018154 0247_ $$2DOI$$a10.1016/j.ssi.2011.06.007
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000018154 041__ $$aeng
000018154 082__ $$a530
000018154 084__ $$2WoS$$aChemistry, Physical
000018154 084__ $$2WoS$$aPhysics, Condensed Matter
000018154 1001_ $$0P:(DE-HGF)0$$aKournoutis, V.Ch.$$b0
000018154 245__ $$aCyclic voltammetry characterization of a La(0.8)Sr(0.2)Co(0.2)Fe(0.8)O(3) (-) (delta) electrode interfaced to CGO/YSZ
000018154 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2011
000018154 300__ $$a13 - 17
000018154 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000018154 440_0 $$05565$$aSolid State Ionics$$v197$$x0167-2738$$y1
000018154 500__ $$aThe authors gratefully acknowledge financial support by the Integrated Project "Real-SOFC" (SES6-CT-2003-502612). They also thank Dr A. Mai, Forschungszentrum Julich (IEF-1), Germany and Dr N. Kotsionopoulos, Department of Chemical Engineering, University of Patras, Greece for the preparation of the perovskite electrode as well as Dr V. Drakopoulos, FORTH/ICE-HT, Greece for the SEM characterization of the electrode.
000018154 520__ $$aThe electrochemical characteristics of a La0.8Sr0.2Co0.2Fe0.8O3 (- delta) cathode electrode interfaced to the CGO layer of a double layer CGO/YSZ electrolyte were studied using cyclic voltammetry, at temperatures of 600 to 850 degrees C and under oxygen partial pressures ranging from 0.07 to 21 kPa. The aim was to identify the electrochemical processes taking place under cathodic polarization on the basis of differences in the features of the cyclic voltammograms with changing conditions. Depending on temperature, sweep rate and oxygen partial pressure, current peaks appeared both in the forward and backward scans. Furthermore, reversed hysteresis was observed, i.e. higher currents in the backward scan than in the forward scan, with increasing oxygen partial pressure and decreasing temperature. The observed behavior was related to the electrochemical redox of B-sites and concomitant stoichiometry change as well as to the competing reaction of electrochemical oxygen redox, taking also into account the competitive action of chemical reactions occurring in the presence of gaseous oxygen. (C) 2011 Elsevier B.V. All rights reserved.
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000018154 65320 $$2Author$$aCyclic voltammetry
000018154 65320 $$2Author$$aLSCF
000018154 65320 $$2Author$$aCathodes
000018154 65320 $$2Author$$aMixed conductors
000018154 65320 $$2Author$$aSolid oxide fuel cells
000018154 65320 $$2Author$$aSOFC
000018154 650_7 $$2WoSType$$aJ
000018154 7001_ $$0P:(DE-Juel1)129667$$aTietz, F.$$b1$$uFZJ
000018154 7001_ $$0P:(DE-HGF)0$$aBebelis, S.$$b2
000018154 773__ $$0PERI:(DE-600)1500750-9$$a10.1016/j.ssi.2011.06.007$$gVol. 197, p. 13 - 17$$p13 - 17$$q197<13 - 17$$tSolid state ionics$$v197$$x0167-2738$$y2011
000018154 8567_ $$uhttp://dx.doi.org/10.1016/j.ssi.2011.06.007
000018154 8564_ $$uhttps://juser.fz-juelich.de/record/18154/files/FZJ-18154_PV.pdf$$yRestricted$$zPublished final document.
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