Enhanced Oxygen Evolution in Perovskite Materials for Syngas Production and Water Splitting in Chemical Looping

Abstract Chemical looping of methane oxidation and water splitting is a promising method for cleaner production of syngas. This process depends on efficient oxygen carriers or catalysts to facilitate the reactions. Perovskite‐based oxygen carriers show great potential for chemical looping due to their excellent oxygen storage and catalytic properties. This study synthesized and investigated the reactivity of novel solid oxide‐based oxygen carrier Ba 1−x Sr x Co 1−x A x O 3− δ (A═Mn/Ni/Fe) to accelerate the surface‐active sites for methane oxidation. Among the catalyst Ba 0.5 Sr 0.5 CO 0.8 Mn 0.2 O 3 achieves methane conversion up to 80% at 850 °C through effective selective methane oxidation through lattice oxygen migration. The addition of Mn at B‐site shows an enhanced performance when compared to the other materials improving redox activity. It balances the surface oxygen and facilitates the replenishment of lattice oxygen from the bulk enhancing the performance while reducing carbon deposition. This provides an enhanced durability and sustained syngas production for up to 40 min. Further during the water splitting stage, Mn doped perovskite shows a stable hydrogen production for up to 200 min by effectively replacing the lattice oxygen. The material exhibits a reduced CO oxidation when compared to other materials. These attribute makes Mn‐doped perovskite promising for advancing longevity and stability in a chemical loop reforming for clean energy production.