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

Abstract Effects of Ce substitution at the A-site of LaNi 0.5 Fe 0.5 O 3 perovskite on the enhanced catalytic activity for dry reforming of methane (DRM) were studied. La 1-x Ce x Ni 0.5 Fe 0.5 O 3 mixed-oxide catalyst precursors were synthesized by a sol-gel self-combustion method. The CH 4 and CO 2 conversions increase for the samples with x = 0.4–0.6. The used catalysts consist of Ni, CeO 2 , and (LaCe)(NiFe)O 3 . The metallic Ni phase provides the primary catalytic activity, while (LaCe)(NiFe)O 3 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 Ce 3+ cation at the A-site of (LaCe)(NiFe)O 3 is active for DRM, and the relevant mechanisms are discussed.