LNLS EXPERIMENTAL REPORT: STUDY OF ELECTRONIC AND COORDINATION STATE OF Ce AND Cu IN METAL/OXIDE COMPOSITES FOR THEIR IMPLEMENTATION AS C-TOLERANT ANODES IN SOLID OXIDE FUEL CELL ANODES

FEDERICO NAPOLITANO; LEONARDO AYALA MENJIVAR; CHANQUIA CORINA M.; LILIANA MOGNI

2017-06-20/2017-06-24

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Desarrollo de Nanomateriales para Dispositivos de Conversión de Energía

Energia-Varios

The main objetive of this proposal is to obtain information about the oxidation state of Ce and Cu in a Metal/Oxide composite used as Solid Oxide Fuel Cells anodes measured under in-situ conditions: 700 °C under wet 10%H2/He and wet 10%CH4/He. Three anodes, prepared by Cu (and Ce) nitrates infiltration on a fluorite-type Zr1-xYxO2 (YSZ) and a Ce doped CeYSZ porous backbone, are proposed: Cu-CeYSZ, Cu-CeO2-YSZ and Cu-CeO2-CeYSZ.In-situ XAS measurements in transmission mode (XANES) at the Cu K- edge (8900 eV) and Ce L3-edge (5723eV) were performed at 700 °C under wet(3%H2O) 10%H2/He and wet 10%CH4/He (100 ml/min) atmospheres using the tubular furnace.The FT of the EXAFS spectra were adquired ex-situ (at room temperature) at the Ce L1-edge (6545eV) before and after reduction (in 10%H2/He at 700℃).