A carbon-based photocatalyst efficiently converts CO2 to CH4 and C2H2 under visible light.

Novel photocatalysts consisting of porphyrin and graphene have been designed to reduce CO2 to hydrocarbons under visible light. These catalysts can (i) effectively reduce CO2 to hydrocarbons, particularly to C2H2; and (ii) selectively control the transfer of photogenerated electrons from graphene to CO2 rather than to H2O. [ABSTRACT FROM AUTHOR]