Controlling　the　morphologies　of　Pt　nanocrystals　provide　effective　opportunities　to　promote　the　electrochemical　properties　and　enhance　the　mass　activity.　Recently　we　have　reported　that　Pluronic　F127　(PEO100PPO65PEO100)　could　serve　as　reducing　reagent　for　synthesis　of　highly　electrocatalytic　activity　of　branched　Pt　nanocrystal.　Herein,　we　further　synthesize　another　novel　Pt　nanosponge　foil　(Pt-NSF)　under　the　same　system　with　Pluronic　F127.　We　expect　to　build　the　relationship　between　block　copolymer　system　and　morphology　design　of　synthesized　nanocrystal　with　specific　electrochemical　property.　The　electrochemical　active　areas　(ECSA)　of　Pt-NSF　and　Pt-black　are　of　the　order　of　20　m(2)　g(-1).　On　one　hand,　step　atoms,　dislocations,　grain　boundaries,　which　observed　from　HRTEM　(high　resolution　transmission　electron　microscope),　are　all　prevalent　on　Pt-NSF,　which　could　serve　as　active　adsorption　sites.　On　the　other　hand,　Pt-NSF　looks　like　an　aggregation　of　many　Pt-black　nanoparticles,　the　connection　formed　skeleton　is　conducive　to　electron　transfer.　These　reasons　aroused　the　mass　activity　and　the　specific　activity　of　Pt-NSF　were　much　higher　than　each　of　Pt-black　toward　the　oxygen　reduction　reaction　activity　(ORR)　at　0.9V　respectively.　Durability　tests　show　that　the　ECSA　of　Pt-NSF　and　Pt-black　declined,　but　the　activity　of　Pt-NSF　toward　the　ORR　was　almost　unchanged.　The　impact　of　structures　on　the　electrochemical　properties　is　described　in　detail.　(c)　2013　Elsevier　Ltd.　All　rights　reserved.