PNNL

Abstract

Two-phase ceramic composites, consisting of Sr1-xLaxTiO3 – Ce1-yLayO2-d (where x=0.25 and 0.35, y=0-0.5), were prepared and tested as solid oxide fuel cell (SOFC) anodes. The oxide anodes exhibited good electrocatalytic activity for hydrogen oxidation in the temperature range 700-900oC, as demonstrated by low anodic polarization resistances measured using half-cell configurations. These composites are known to withstand multiple reduction-oxidation cycles and resist sooting in hydrocarbon fuels as well as tolerate exposures to hydrogen sulfide in a hydrogen fuel stream without experiencing degradation of performance.