The　influence　of　graphene　oxide　geometry　on　electrochemical　performance　is　of　great　interest,　but　there　are　few　reports　on　this　subject.　Three　different　members　of　the　graphene　oxide　family,　graphene　oxide　nanosheets,　graphene　oxide　nanoribbons,　and　graphene　oxide　quantum　dots　were　comparatively　investigated　as　electrode　materials　to　systematically　study　the　effect　of　geometric　structure.　The　results　showed　that,　as　the　geometric　structure　varies,　the　three　graphene　oxide　materials　possess　different　electrical　conductivities,　various　defect　densities　and　oxygen　contents,　as　well　as　diverse　electrode　surface　chemistry　and　microstructures,　which　combine　together　to　result　in　the　distinct　electrochemical　responses　for　the　modified　electrodes,　depending　on　the　redox　system　involved.　This　work　broadens　the　method　of　studying　the　electrochemical　performance　of　many　other　materials　from　the　perspective　of　geometry.　(C)　2015　Elsevier　B.V.　All　rights　reserved.