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

AFRA FERNANDEZ ZUVICH; ANALÍA SOLDATI; SUSANA LARRONDO; MARTÍN SALETA; DIEGO GERMÁN LAMAS; LAURA CECILIA BAQUÉ; ALBERTO CANEIRO; ADRIANA SERQUIS

Cancún

Congreso; 2014 ECS and SMEQ Joint International Meeting; 2014

The Electrochemical Society

We present a new modified sol-gel method to incorporate Ni into the precursors solution. This route produces a powder with a very homogeneous Ni distribution as observed by Scanning electron microscopy (SEM). Transmission electron microscopy (TEM) and Energy Dispersive Spectroscopy (EDS) analysis indicate that this modification resulted in smaller particle sizes with narrower distribution than the commercial cermet. The study of the oxidation state and coordination of Ce and Ni in these cermets, simulating in-operando conditions, is performed using synchrotron Dispersive X-ray absorption spectroscopy (DXAS) technique. A correlation between the catalytic/redox properties with the sample´s characteristics (microstructure, Ni distribution, etc.) is discussed.