Time Resolved DXAS Study on Micro and Nano NiO/Ce0.9Gd0.1O1.95 Cermets for Intermediate Temperature Solid Oxide Fuel Cells

FERNANDEZ ZUVICH, AFRA; LARRONDO, SUSANA A.; SALETA, MARTÍN; NAPOLITANO, FEDERICO; CANEIRO, ALBERTO; TROIANI, HORACIO; LAMAS, DIEGO; ARCE, MAURICIO; SERQUIS, ADRIANA C.; SOLDATI, ANALIA L.

ECS Transactions

The Electrochemical Society

Lugar: San Diego; Año: 2016 vol. 72 p. 215 - 224

1938-6737

We present a crystallographic, morphologic and redox dynamic studyon (60:40) NiO/Ce0.9Gd0.1O1.95 (NiO/GDC) cermets simulatingIntermediate Temperature Solid Oxide Fuel Cells (IT-SOFC) anodes in situ conditions. We tested micro- and nanometer sized materials at 700ºC in three different atmospheres (5% H2, 5% O2 and 20% CH4). We used Dispersive X-ray Absorption Spectroscopy (DXAS) analysis at the Ce L3-edge and at the Ni K-edge to follow the metal´s oxidation states. A correlation between the catalytic/redox properties and the sample´s characteristics (microstructure, Ni distribution, etc.) was found, indicating that nanometric sized particles showed faster and higher reduction extents than micrometric particles of the same composition.