SYNERGY OF Pd AND Ni CATALYSTS FOR DIRECT OXIDATION OF METHANE OVER LANTHANUM CHROMITE BASED ANODES

摘要

Continuous operation of solid oxide fuel cells (SOFC) with dry methane fuel was performed with a low loading of Pd-Ni catalyst on a lanthanum chromite based porous composite anode at 1073-1173 K. Synergy of Pd and Ni catalysts was observed for the direct oxidation of methane. The maximum power densities with the Pd-Ni/composite anode were 150 mW cm~(-2) at 1073 K and 360 mW cm~(-2) at 1173 K. No physical damage was observed for the SOFC during the exposure experiment of the Pd-Ni/composite anode to methane under open circuit conditions. A suitable reaction scheme is proposed for the Pd-Ni synergy catalysts for the direct oxidation of dry methane.