Ceramic Oxide Anode with Precipitated Catalytic Nanoparticles for Ethanol Fueled SOFC

Abstract

Carbon resistant and redox stable anodes have been intensively studied aiming at effective fuel-flex solid oxide fuel cells. Previous studies have demonstrated that La 0.75 Sr 0.25 Cr 0.50 Mn 0.50 O 3 (LSCM) perovskite has comparable performance in both hydrogen and methane fueled SOFCs. In the present study, LSCM compounds with partial substitutions of either Mn or Cr by Ru (LSCM-Ru) were synthesized and characterized. Thermal analysis and X-ray diffraction were used to study the thermal evolution of precursor resins and phase formation. The electrical properties were investigated by 4-probe measurements in the 25-800°C temperature range. X-ray diffraction data evidenced that single phase compounds were obtained at 1200°C, without significant structural distortions up to ~ 10 at.% Ru. The electrical resistivity data showed that the transport properties depend on the substituted cation. In addition, the formation of Ru nanoparticles on the surface of LSCM-Ru grains suggests that LSCM-Ru compounds have enhanced catalytic activity for carbon containing fuels.

A ceramic electrode of ZrO2-Y2O3 for the generation of oxidant species in anodic oxidation. Assessment of the treatment of Acid Blue 29 dye in sulfate and chloride media

“…Ceramic anodes have been extensively used in fuel cells, primordially in solid oxide fuel cells (SOFCs) [21,22]. Good performance has been obtained for complexes composites of La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3- -Ce 0.9 Gd 0.1 O 1.95- and Ni-based materials, like Ni with 8% mol Y 2 O 3 stabilized ZrO 2 (7YSZ) [23].…”