P and Cu Dual Sites on Graphitic Carbon Nitride for Photocatalytic CO2Reduction to Hydrocarbon Fuels with High C2H6Evolution

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Abstract
The light‐driven CO2reduction to multi‐carbon products is especially meaningful, while the low efficiency of multi‐electron transfer and sluggish C−C coupling greatly hinder its development. Herein, we report a photocatalyst comprising of P and Cu dual sites anchored on graphitic carbon nitride (P/Cu SAs@CN), which achieves a high C2H6evolution rate of 616.6 μmol g−1 h−1in reducing CO2to hydrocarbons. The detailed spectroscopic characterizations identify the formation of charge‐enriched Cu sites, where the isolated P atoms serve as hole capture sites during photocatalysis. Theoretical simulations combined with in situ FTIR measurement reveal a kinetically feasible process for the formation of C−C coupling intermediate (*OC−COH) and confirm the favorable production of C2H6on the P/Cu SAs@CN photocatalyst. This work offers new insights into the photocatalyst design with atomic precision toward highly efficient photocatalytic CO2conversion to high value‐added carbon products.
Funding Information
  • National Natural Science Foundation of China (21971002)

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