▎ 摘　　要

Reduced graphene oxide supported Cu2O nanoparticles were prepared by a liquid-phase reduction method and employed as an efficient heterogeneous catalyst for Sonogashira cross-coupling reaction. The catalyst exhibits high activity and selectivity towards the reaction of aryl halides with phenylacetylene under palladium-free and ligand-free conditions. Cu2O nanoparticles could activate phenylacetylene to produce copper(I) acetylide compounds, which subsequently react with aryl halides to form the corresponding disubstituted alkynes. The catalyst also shows a high stability and there is only slight decrease of activity after five cycles.