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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hansen, Karin Vels
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2021Short-term strong cathodic polarization of Ni/YSZ and Pt/YSZ
- 2019Influence of sintering profile on the microstructure and electronic transport properties of Sr(Ti,Nb)O3 tapes for solid oxide cell applications
- 2019Probe electrode study of cathodically polarized PtIr-YSZ interfacescitations
- 2017Dynamic and Impure Perovskite Structured Metal Oxide Surfacescitations
- 2016Effects of strong cathodic polarization of the Ni-YSZ interfacecitations
- 2016New Hypothesis for SOFC Ceramic Oxygen Electrode Mechanismscitations
- 2015Environmental TEM study of the dynamic nanoscaled morphology of NiO/YSZ during reductioncitations
- 2015Need for In Operando Characterization of Electrochemical Interface Features
- 2015Dynamic behavior of impurities and native components in model LSM microelectrodes on YSZcitations
- 2014NiO/YSZ Reduction for SOFC/SOEC Studied In Situ by Environmental Transmission Electron Microscopycitations
- 2014In situ surface reduction of a NiO-YSZ-alumina composite using scanning probe microscopycitations
- 2013Oxygen Electrode Kinetics and Surface Composition of Dense (La0.75Sr0.25)0.95MnO3 on YSZcitations
- 2013Electrochemical reduction of NiO in a composite electrodecitations
- 2013Oxygen Electrode Kinetics and Surface Composition of Dense (La 0.75 Sr 0.25 ) 0.95 MnO 3 on YSZcitations
- 2012Composite Sr- and V-doped LaCrO 3 /YSZ sensor electrode operating at low oxygen levelscitations
- 2012Fundamental Material Properties Underlying Solid Oxide Electrochemistry
- 2012Composite Sr- and V-doped LaCrO3/YSZ sensor electrode operating at low oxygen levelscitations
- 2010Quantitative data analysis methods for 3D microstructure characterization of Solid Oxide Cells
- 2010High Performance Fe-Co Based SOFC Cathodescitations
- 2008Effects of trace elements at the Ni/ScYSZ interface in a model solid oxide fuel cell anodecitations
- 2001Microstructural and chemical changes at the Ni/YSZ interfacecitations
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article
Electrochemical reduction of NiO in a composite electrode
Abstract
Electrochemical reduction of NiO in a composite electrode along with 8 mol% Y2O3 stabilized zirconia (8YSZ) is studied. Voltage sweeps are performed on cells with a counter electrode made from Pt or the composite of (La0.75Sr0.25)0.95MnO 3 ± δ (LSM25) and 8YSZ, but the composite electrode gives a lower overpotential. Microstructures of NiO with different reduction degrees are shown. Electrochemical impedance spectroscopy is carried out during the reduction process. Electrochemical reduction of NiO may need an induction period. When NiO is reduced at a constant voltage the current initially increases, hereafter a decay is observed. The kinetics of electrochemical reduction of NiO can be described by the Avrami equation. In performed experiments the exponent of the Avrami equation is in the range of 0.5-0.7 and the overall rate constant varies from 1.19 to 7.73 × 10- 3 and increases with temperature and in particular with the applied voltage. The maximum reaction rate is obtained when 2-11% NiO is reduced. The increasing resistance in NiO reduction can be exclusively ascribed to one arc in impedance spectra. © 2013 Elsevier B.V.