铂基空心纳米框架的合成及其在直接醇燃料电池中的应用（英文）-豆柴文库

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铂基空心纳米框架的合成及其在直接醇燃料电池中的应用（英文）
SynthesisofPlatinum-BasedHollowNanoframeworksandTheirApplicationsinDirectAlcoholFuelCells
Abstract:
Platinum-basedhollownanoframeworkshaveattractedsignificantattentioninrecentyearsduetotheiruniquestructuralfeaturesandpromisingapplicationsindirectalcoholfuelcells(DAFCs).ThispaperaimstoreviewthesynthesismethodsofthesenanoframeworksanddiscusstheirpotentialapplicationsinDAFCs.
1.Introduction:
Directalcoholfuelcellshaveemergedasapromisingalternativetoconventionalfuelcellsforportableandstationarypowersourcesduetotheirefficiency,lowoperatingtemperature,andhighenergydensity.However,theperformanceanddurabilityofDAFCsarelimitedbytheslowkineticsofalcoholoxidationreactions.Platinum-basedcatalystshavebeenwidelyusedtoenhancethecatalyticactivityanddurabilityofDAFCs.Thehollownanoframeworkstructureoffersadvantagessuchashighsurfacearea,fastmasstransport,andhighcatalyticactivity,makingitanidealplatformforoptimizingtheperformanceofDAFCs.
2.SynthesisMethodsofPlatinum-BasedHollowNanoframeworks:
Severalmethodshavebeendevelopedforthesynthesisofplatinum-basedhollownanoframeworks.Themostcommonapproachinvolvesthegalvanicreplacementreaction,whereasacrificialtemplate(e.g.,silverorcopper)isetchedbyplatinumionstoformahollowstructure.Othermethodsincludetemplate-assistedsynthesis,dealloying,andself-assembly.Thesemethodsallowprecisecontroloverthesize,shape,andcompositionofthenanoframeworks,enablingtheoptimizationoftheircatalyticproperties.
3.StructuralandPhysicochemicalProperties:
Platinum-basedhollownanoframeworkstypicallyexhibitaporousshellstructurewithahighsurface-to-volumeratio.Theuniquehollowstructureprovidesefficientmasstransportandexposesalargenumberofactivesites,leadingtoenhancedcatalyticactivity.Thecompositionofthenanoframeworkscanbetailoredbyincorporatingothermetalornon-metalelements,furtherimprovingtheircatalyticproperties.
4.PerformanceinDirectAlcoholFuelCells:
Platinum-basedhollownanoframeworkshaveshownexcellentcatalyticactivityandstabilityinDAFCs.Theyexhib