Electronic and Morphological Characterization of Nanostructured Ni-Doped (Ce,Gd)O2-δ Anodes for IT-SOFCS

A. FERNANDEZ ZUVICH; A. SOLDATI; S. LARRONDO; M. SALETA; D. G. LAMAS; L. BAQUÉ; A. CANEIRO; A SERQUIS

ECS Transactions

Electrochemical Society

Año: 2014 vol. 64 p. 233 - 240

1938-5862

We present a new modified sol-gel method to incorporate Ni intothe precursors solution. This route produces a powder with a veryhomogeneous Ni distribution as observed by Scanning electronmicroscopy (SEM). Transmission electron microscopy. (TEM) andEnergy Dispersive Spectroscopy (EDS) analysis indicate that thismodification resulted in smaller particle sizes with narrowerdistribution than the commercial cermet.The study of the oxidation state and coordination of Ce and Ni inthese cermets, simulating in-operando conditions, is performedusing synchrotron Dispersive X-ray absorption spectroscopy(DXAS) technique. A correlation between the catalytic/redoxproperties with the sample´s characteristics (microstructure, Nidistribution, etc.) is discussed.