Cuprous　oxide　(Cu2O)　nanoparticles　dispersed　on　reduced　graphene　oxide　(RGO)　were　prepared　by　reducing　copper　acetate　supported　on　graphite　oxide　using　diethylene　glycol　as　both　solvent　and　reducing　agent.　The　Cu2O/RGO　composite　exhibits　excellent　catalytic　activity　and　remarkable　tolerance　to　methanol　and　CO　in　the　oxygen　reduction　reaction.