▎ 摘　　要

A cross-dehydrogenative coupling (CDC) reaction between tertiary amines and nitroalkanes has been realized under an oxygen atmosphere in water simply by using graphene-supported RuO2 as the catalyst, which was made from water-soluble graphene with sulfonic groups and RuCl3 center dot nH(2)O to form RuO2 center dot nH(2)O nanocomposites in situ. In contrast to RuCl3 center dot nH(2)O and RuO2 center dot nH(2)O, the graphene-supported RuO2 nanoparticles exhibited higher activity and stability for the aerobic CDC reaction in water.