▎ 摘　　要

Highly selective photocatalytic conversion of biomass-derived chemicals into value-added chemicals and clean hydrogen energy under mild conditions by simultaneously utilizing photogenerated holes and electrons is in line with the theme of sustainable development of green chemistry. Herein, a two-dimensional (2D) heterostructure of ternary Ni2P-graphene-lepidocrocite TiO2 (NPG-TiO2) with intimately interfacial contact has been successfully fabricated, which exhibits significantly elevated photocatalytic performance toward coevolution of benzaldehyde (2.17 mmol/h/g) and hydrogen (1.97 mmol/h/g) from biomass-derived benzyl alcohol in aqueous solution under the visible light irradiation. Mechanistic studies reveal that in this ternary heterostructure, graphene serves as an electron relay mediator to facilitate the flow of electrons from TiO2 to Ni2P due to its inherent electrical conductivity, and the Ni2P provides the active sites for photocatalytic proton reduction to hydrogen. It is anticipated that this work would make a contribution to rational design of 2D flat-structured multi-component photocatalysts for selective conversion of biomass-derived chemicals coupled with hydrogen evolution. [GRAPHICS]