▎ 摘　　要

CdIn(2)S(4)micro-flower spheres modified with Au NPs and rGO have been designed for CO(2)photoreduction. The photoproduction yields of CO and CH(4)were 4 and 5 times higher than that of pure CdIn2S4, respectively. The photoproduction of CO and CH(4)from the photocatalytic CO(2)reduction process has been evidenced by(13)C isotope tracer tests. Au NPs act as both the acceptor of photogenerated electrons and the donor of hot electrons at the CdIn(2)S(4)and rGO interface. Three electron transfer channels: CdIn2S4 -> Au -> rGO, CdIn2S4 -> Au, and Au -> rGO, efficiently improve the transfer efficiency of electrons. Meanwhile, CO(2)adsorption is largely improved, as confirmed by DFT calculations which indicate that the CO(2)adsorption ability of the C sites from rGO has been enhanced by Au NPs.In situFTIR has been carried out to research the CO(2)photoreduction process. This work demonstrates the importance of efficient electron transfer and excellent CO(2)adsorption in improving the efficiency of CO(2)photoreduction, providing an inspiring concept for future advancement in this area.