▎ 摘　　要

The photocatalytic conversion of biomass to renewable fuels and chemicals is significant for the sustainable development of energy resources. Herein we report that bimetallic Au-Ru nanoparticles supported on reduced graphene oxides (rGO) exhibit excellent photocatalytic performances for the synthesis of 2,5-diformylfuran (DFF) from partial oxidation of 5-hydroxymethyfurfural (HMF) or one-pot conversion of fructose in the absence of any bases, and the yield of DFF can reach as high as 91% and 86%, respectively. Comparing with rGO-supported monometallic Au or Ru catalysts, the Au-Ru/rGO catalyst shows higher photocatalytic activity due to the transfer of photo-excited electrons from Ru to Au nanoparticles through the conductive graphene support. Since the Au-Ru/rGO catalyst can utilize abundant solar energy, avoid the usage of bases and demonstrate high selectivity and good reusability, the present work provides a green, economical and efficient synthetic route for DFF production.