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空气阴极微生物燃料电池氧还原催化材料研究.docx

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空气阴极微生物燃料电池氧还原催化材料研究 Title:ResearchonOxygenReductionCatalystMaterialsforAirCathodeMicrobialFuelCells Abstract: Microbialfuelcells(MFCs)haveemergedasapromisingtechnologyforrenewableenergyproduction,utilizingmicroorganismstoconvertorganicmatterintoelectricity.AircathodeMFCs,inparticular,havegainedsignificantattentionduetotheircost-effectivenessandpotentialforscalingup.However,theperformanceoftheseMFCsislimitedbytheoxygenreductionreaction(ORR)atthecathode.Therefore,extensiveresearchhasbeenconductedtoexploreefficientcatalystmaterialsforenhancingtheORRprocess.ThispaperaimstoreviewtherecentadvancementsandchallengesfacedinthedevelopmentofoxygenreductioncatalystmaterialsforaircathodeMFCs. 1.Introduction: Microbialfuelcellsrepresentagroundbreakingtechnologythatharnessesthemetabolicactivityofmicroorganismstoproduceelectricity.MFCsoperatebyutilizingmicroorganisms'abilitytooxidizeorganicmatterandtransferelectronstoanelectrodesurface.Thisinteractionbetweenbacteriaandtheelectrodegeneratesanelectriccurrent. 2.OxygenReductionReactioninAirCathodeMFCs: Theoxygenreductionreaction,whichconvertsoxygentowater,iscrucialfortheefficientoperationofMFCs.However,thisORRprocessisslowandrequireshighactivationenergy.ThesluggishkineticsoftheORRsignificantlylimitstheoverallperformanceandpoweroutputofMFCs. 3.CatalystMaterialsforEnhancingORR: ToimprovetheORRprocess,variouscatalystmaterialshavebeeninvestigated.Platinum-basedcatalystshavedemonstratedexcellentperformance;however,theirhighcostimpedestheirwide-scaleapplication.Thus,researchershaveworkedonfindingalternativecatalystmaterialsthatexhibitcomparableefficiencybutatalowercost. 4.Non-PreciousMetalCatalysts: Effortshavebeenmadetodevelopnon-preciousmetalcatalystsasalternativestoplatinum-basedcatalysts.Transitionmetal-basedcatalysts,suchascobaltandiron,haveshownpromisingresults.However,thechallengeliesintheirlimiteddurabilityandvulnerabilitytodegradationovertime.Therefore,researcherscontinuetoexploretechniquestoenhancethestabilityandperformanceofthes