Effects of Ce substitution at the A-site of LaNi0.5Fe0.5O3 perovskite on the enhanced catalytic activity for dry reforming of methane

Effects of Ce substitution at the A-site of LaNi0.5Fe0.5O3 perovskite on the enhanced catalytic activity for dry reforming of methane (DRM) were studied. La1-xCexNi0.5Fe0.5O3 mixed-oxide catalyst precursors were synthesized by a sol-gel self-combustion method. The CH4 and CO2 conversions increase for the samples with x = 0.4–0.6. The used catalysts consist of Ni, CeO2, and (LaCe)(NiFe)O3. The metallic Ni phase provides the primary catalytic activity, while (LaCe)(NiFe)O3 perovskite dominates the enhanced catalytic activity. It is confirmed that the solubility of Ce in the perovskite is high under the DRM conditions. Our results suggest that the Ce3+ cation at the A-site of (LaCe)(NiFe)O3 is active for DRM, and the relevant mechanisms are discussed.