Photocatalytic CO Transformation to CH by Ag/Pd Bimetals Supported on N-Doped TiO Nanosheet.

To develop photocatalysts with desirable compositions and structures for improving the efficiency and selectivity of CO conversion to CH under mild conditions is of great importance. Here, we design an effective photocatalyst of bimetal (Ag/Pd) nanoalloys supported on nitrogen-doped TiO nanosheet for CO conversion. Such a novel photocatalyst combines multiple advantages of abundant Ti ions, oxygen vacancies, and substitutional nitrogen that are favorable for catalyzing CO reduction. It was found that CO could be efficiently transformed to CH under mild conditions, i.e., in aqueous solution and at atmospheric pressure and room temperature. The maximum production rate of CH can reach 79.0 μmol g h. Moreover, the Ag/Pd bimetals supported on N-doped TiO nanosheet exhibit high selectivity to CH. The as-synthesized photocatalyst can be well recycled for CO reduction.