INVESTIGADORES
SERQUIS Adriana Cristina
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:
A. FERNANDEZ ZUVICH; S. LARRONDO; M. SALETA; F. NAPOLITANO; A. CANEIRO; H. TROIANI; D. G. LAMAS; A. SERQUIS
Revista:
ECS Transactions
Editorial:
The Electrochemical Society
Referencias:
Lugar: Auburn; Año: 2016 vol. 72 p. 215 - 224
ISSN:
1938-6737
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 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.
