INVESTIGADORES
NAPOLITANO Federico Ricardo
artículos
Título:
Time resolved DXAS study on micro and nano NiO/Ce0.9Gd0.1O1.95 cermets for intermediate temperature solid oxide fuel cells
Autor/es:
FERNANDEZ ZUVICH, A.; LARRONDO, S.; SALETA, M.E.; NAPOLITANO, F.R.; CANEIRO, A.; TROIANI, H.E.; LAMAS, D.G.; ARCE, M.D.; SERQUIS, A.; SOLDATI, A.L.
Revista:
ECS Transactions
Editorial:
Electrochemical Society Inc.
Referencias:
Año: 2016 vol. 72 p. 215 - 224
ISSN:
1938-5862
Resumen:
We present a crystallographic, morphologic and redox dynamic study on (60:40) NiO/Ce0.9Gd0.1O1.95 (NiO/GDC) cermets simulating Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFC) anodes in situ conditions. We tested micro- and nanometer sized materials at 700°C 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.
