论文题目：Pt/BiOBr Nanocomposite Supported on Graphdiyne for theSelective Photoreduction of CO2 into Hydrocarbons
论文摘要：Regulating the electron−hole lifetime would increase thesurface charge density of photocatalysts and then promote the photo-catalytic conversion of CO2 into hydrocarbons. Herein, Pt and graphdiyne(GDY), respectively, as electron and hole transfer bodies were introducedinto a multiple Pt/BiOBr-GDY heterojunction, constructing fast channelsof electron and hole transfer and then prolonging their lifetime. Under lightirradiation, the Pt/BiOBr-GDY nanocomposite changed the productdistribution and significantly allowed the selective photocatalytic CO2conversion to CH4 and C2 hydrocarbons (C2H4 and C2H6), with thetotal CxHy selectivity of about 97%. The synergistic effect of Pt and GDYfacilitated the separation and transfer of photogenerated electrons and holeson BiOBr, increased the surface charge density, and ultimately improvedthe efficiency of photocatalytic CO2 reduction. At the same time, due to thecharacteristics of GDY, it can afford more surface-adsorbed active sites for CO2 and intermediates, thus further improving thephotocatalytic efficiency and selectivity. Hence, this work provides an insight into the promotion of the selective photoreduction ofCO2 to hydrocarbon products by the synergistic effect of the metal, semiconductor, and GDY.