pt基催化剂的制备与其对甲醇电催化性能的研究

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1、安徽师范大学硕士毕业论文2.0timesthatofnormalcore-shellone,respectively.ItisthespecialAu-Ptbimetallicstructurethatgivesrisetotheexcellentcatalysis.Besidestheoriginalenhancementofcore-shellnanostructure,PtnanorodsassembledshellallowstheexposedsurfaceofPtoutsideasefficientlyaspossibleandenlargethePtutiliz

2、ation,leadingtothemuchhigherECSAandactivity.2.WedemonstrateafacilemethodtofabricateAu-Ptdouble-wallednanotubes(Au-PtDWNTs).Thedouble-wallednanotubesarefabricatedthroughthegalvanicdisplacementreactionbetweenAgnanowiresandvariousmentalionsandmadeupofanAuinnerwallandaPtouterwall.TheseAu-PtDWNT

3、scatalystsrepresentthehighelectrochemicallyactivesurfaceareaandthepeakcurrentdensityofAu-Ptdouble-wallednanotubesinmethanoloxidationismuchhigherthancommercialPt/C.After3600scontinualmeasurement,theoxidationcurrentdensityofAu-PtDWNTsalsoretainsahighervaluewhichisabout8timesthatofcommercialPt

4、/Ccatalysts.TheattractiveperformanceexhibitedbythesepreparedAu-Ptdouble-wallednanotubeswouldbecontributedtotheuniquestructureswhichmakethempromisingcandidatesashigh-performancecatalysts.3.Weusemulti-walledcarbonnanotubes(MWNTs)assupportingmaterial,hollowPtnanoparticlesareuniformlydepositedo

5、ntheMWNTssurfacethroughthegalvanicdisplacementreactionandtheobtainedPt-MWNTspossessmuchbetterelectro-oxidationcatalyticactivityandsteady-stateactivitytowardsmethanolelectro-oxidation.KeyWords:Au-Pt,Pt-MWNTs,synthesis,methanolelectro-oxidation,catalyticperformance安徽师范大学硕士毕业论文目录第一章绪论.........

6、..............................................................................................................................11.1引言..........................................................................................................................................11.2直接甲醇燃料电池的概述......

7、...............................................................................................11.2.1直接甲醇燃料电池的简介.........................................................................................11.2.2直接甲醇燃料电池的工作原理..................................