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原位热解法制备铁、氮共掺杂炭基催化材料的结构调控及其氧还原电催化性能研究.docx

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原位热解法制备铁、氮共掺杂炭基催化材料的结构调控及其氧还原电催化性能研究 标题：原位热解法制备铁、氮共掺杂炭基催化材料的结构调控及其氧还原电催化性能研究 Abstract: Inrecentyears,carbon-basedcatalystswithironandnitrogenco-dopinghaveattractedconsiderableattentioninthefieldofelectrocatalysisduetotheirexcellentcatalyticactivityfortheoxygenreductionreaction(ORR).Inthisstudy,weemployedanin-situpyrolysismethodtosynthesizeironandnitrogenco-dopedcarboncatalysts,andinvestigatedtheirstructurecontrolandORRelectrocatalyticperformance.Theresultsdemonstratethesignificantinfluenceofreactiontemperature,precursorcomposition,andpyrolysistimeonthestructureandpropertiesofthecatalysts.Theas-preparedcatalystsexhibitremarkableORRperformance,makingthempromisingcandidatesforfuelcellapplications. Keywords:ironandnitrogenco-doping,carbon-basedcatalysts,in-situpyrolysis,structurecontrol,oxygenreductionreaction,electrocatalyticperformance,fuelcells. 1.Introduction Asthedemandforrenewableenergysourcesincreases,fuelcellshaveemergedasapromisingtechnologyforenergyconversionduetotheirhighefficiencyandlowenvironmentalimpact.However,thesluggishoxygenreductionreaction(ORR)atthecathoderemainsakeybottleneckforthewidespreadcommercializationoffuelcells.Currently,Pt-basedcatalystsarethemosteffectiveORRelectrocatalysts,buttheirhighcostandlimitedavailabilityhindertheirpracticalapplication.Therefore,thedevelopmentofalternativeandcost-effectivecatalystswithcomparableorevensuperiorORRperformanceisofgreatimportance. 2.SynthesisofIronandNitrogenCo-DopedCarbonCatalysts Inthisstudy,anin-situpyrolysismethodwasemployedtosynthesizeironandnitrogenco-dopedcarboncatalysts.Theprocessinvolvesthepyrolysisofamixtureofacarbonprecursor,anironsource,andanitrogensourceataspecifictemperatureunderaninertatmosphere.Thecarbonprecursorcanbechosenfromvariousorganiccompounds,suchassugars,polymers,orbiomass.Similarly,theironandnitrogensourcescanbeselectedfromarangeofcompounds,includingironsaltsandamines.Thecompositionandratiooftheseprecursors,aswellasthepyrolysistemperatureandtime,canbeadjustedtoachievedesiredcata