▎ 摘　　要

In this work, a photocatalyst consisting of porphyrin and graphene was designed to reduce CO2 to hydrocarbons under visible light. This catalyst can (1) effectively reduce CO2 to hydrocarbons, particularly to C2H4; (2) selectively control the photogenerated electrons transfer path due to the physico-chemical properties of porphyrin and graphene; and (3) reduce the complexity of investigating this photocatalytic process because the photocatalyst has fewer defects, thus preventing the introduction of interference factors.