Despite　several　pioneering　work,　the　fundamental　study　of　partially　unzipped　carbon　nanotubes　(PUCNTs)　as　an　electrode　material　has　hardly　been　done.　In　this　work,　we　synthesized　PUCNTs　by　solution-based　longitudinal　unzipping　of　carbon　nanotubes　(CNTs)　and　rigorously　studied　their　electrochemical　characteristics　by　using　three　representative　redox　probes.　Electrochemical　measurements　reveal　the　superior　electrochemical　response　of　PUCNTs　in　comparison　with　CNTs,　which　can　be　attributed　to　the　unique　CNT-graphene　complex　structure　of　PUCNTs.　Besides,　for　the　three　redox　probes　involved,　the　electron　transfer　kinetics　of　PUCNTs　behave　variously,　indicating　that　the　extent　to　which　structural　features　affect　electron　transfer　rates　depends　on　the　analytes.　Our　work　suggests　the　great　potential　of　PUCNTs　as　a　sort　of　new　electrode　material　for　future　electrochemical　applications.　©　2014　Elsevier　B.V.