Search results for "LSCF"

showing 3 items of 3 documents

The Effect of Ni Doping on the Performance and Electronic Structure of LSCF Cathodes Used for IT-SOFCs

2018

We investigated the effect of nickel doping on the electronic structure and performance of nanostructured La0.6Sr0.4Co0.2Fe0.8-0.03Ni0.03O3-delta prepared by the one-pot sol gel method. The commercial undoped La0.6Sr0.4Co0.2Fe0.8O3-delta (ISCF0.8) was used as reference. Moreover, for comparison, Ni (3 mol %) was deposited by wetness impregnation over the La0.6Sr0.4Co0.2Fe0.8O3-delta. We show by in situ X-ray absorption spectroscopy at 900 degrees C under air flow that nickel enters the B perovskite site of the material and favors the stabilization of the cobalt oxidation state, as evidenced by the delay in the decrease of the average Co valence with respect to undoped samples. Our results a…

Ni-dopedMaterials scienceAbsorption spectroscopyLSCFAnalytical chemistrychemistry.chemical_element02 engineering and technology010402 general chemistryElectronic Optical and Magnetic Materials; Energy (all); Physical and Theoretical Chemistry; Surfaces Coatings and Films01 natural sciencesCoatings and Filmssymbols.namesakeOxidation stateElectronicOptical and Magnetic MaterialsPhysical and Theoretical ChemistryValence (chemistry)IT-SOFCElectronic Optical and Magnetic MaterialDoping021001 nanoscience & nanotechnology0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsDielectric spectroscopySurfacesNickelEnergy (all)General EnergychemistrySettore CHIM/03 - Chimica Generale E Inorganicasymbols0210 nano-technologyRaman spectroscopyCobaltThe Journal of Physical Chemistry C
researchProduct

Palladium local structure of La1-xSrxCo1-yFey-0.03Pd0.03O3-δperovskites synthesized using a one pot citrate method

2014

Nanostructured La1-xSrxCo1-yFey-0.03Pd0.03O3-δ(LSCF-Pd) perovskites with fixed La-Sr composition (x = 0.4) and two different Fe contents (y = 0.2 and 0.8) were successfully synthesized using a one pot citrate method starting from nitrates of the metal cations. Pd-free La1-xSrxCo1-yFeyO3-δ(LSCF) systems were prepared for comparison. LSCF powders were calcined at 1300 °C and characterized by XRD and Rietveld refinement, EXAFS, XPS, TPR analyses. Promotion of La0.6Sr0.4Co0.8Fe0.2O3-δand of La0.6Sr0.4Co0.2Fe0.8O3-δby incorporation of palladium was evidenced by solving the local environment of Pd using EXAFS spectroscopy. XPS analyses, in agreement with TPR measurements, demonstrated an inc…

Physics and Astronomy (all); Physical and Theoretical ChemistryLSCF perovskyte EXAFS XRD TPRMaterials scienceExtended X-ray absorption fine structureRietveld refinementInorganic chemistryGeneral Physics and Astronomychemistry.chemical_elementIonic bondinglaw.inventionMetalPhysics and Astronomy (all)X-ray photoelectron spectroscopychemistrylawvisual_artvisual_art.visual_art_mediumCalcinationPhysical and Theoretical ChemistryPalladiumPerovskite (structure)
researchProduct

Nuovi materiali per celle a combustibile ad ossidi solidi a temperatura intermedia (IT-SOFC): sintesi, caratterizzazione e correlazione struttura-pro…

2014

Settore CHIM/03 - Chimica Generale E InorganicaIT-SOFC LSCF Pd-doped cathode GDC electrolyte EIS
researchProduct