LAUSR

The extensive emission of CO 2 results in critical environmental issues such as global warming. Photocatalytic CO 2 conversion is a meaningful route to convert CO 2 into useful chemicals. However, the highly selective reduction of CO 2 with the avoidance of hydrogen evolution is still challenging. Herein, the photocatalytic reduction CO 2 to synthesis gas (syngas) was achieved on a metal Ag socketed perovskite LaFeO 3 (LFO) catalytic interface prepared by an in-situ exsolution method. The conduction band of Ag exsolved LFO is more negative than LFO, benefiting for efficient CO 2 reduction. By tuning the dopant Ag cation in lattice to nanoparticle pinned on surface, the CO formation rate was improved by ~ 5 times from 0.51 to 2.41 μmol g -1 h -1 .  Meanwhile, the H 2/CO molar ratio also shows strong dependence on the modality Ag at the metal-perovskite interface. The design offers a prosperous mean for transforming CO 2 to valuable chemicals based on efficient photocatalysts design.