工况表征方法揭示燃料电池催化层中过氧化氢浓度（英文）-豆柴文库

您所在位置：网站首页 / 工况表征方法揭示燃料电池催化层中过氧化氢浓度（英文）.docx / 文档详情

在线预览结束，喜欢就下载吧，查找使用更方便

5 金币

下载文档

/ 2

下载提示

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

文本预览

工况表征方法揭示燃料电池催化层中过氧化氢浓度（英文）
Title:CharacterizationMethodsforRevealingHydrogenPeroxideConcentrationinFuelCellCatalystLayers
Abstract:
Fuelcellshavegainedsignificantinterestasacleanandefficientenergyconversiontechnology.Theperformanceanddurabilityoffuelcellsheavilyrelyonthebehaviorandconcentrationofhydrogenperoxide(H2O2)inthecatalystlayer.AccuratecharacterizationofH2O2concentrationiscrucialforunderstandingthereactionmechanismandoptimizingthedesignoffuelcellsystems.ThispaperaimstoreviewanddiscussvariousmethodsforcharacterizingH2O2concentrationinfuelcellcatalystlayers.
1.Introduction:
Fuelcellsareelectrochemicaldevicesthatconvertthechemicalenergyofafuel,typicallyhydrogen,intoelectricalenergy.Themostcommontypesoffuelcellsemployapolymerelectrolytemembrane(PEM)wherehydrogenandoxygenreacttoproducewaterandelectricity.Inthesecells,thecatalystlayerplaysacrucialroleinfacilitatingtheoxygenreductionreaction(ORR)andhydrogenoxidationreaction(HOR).H2O2,abyproductoftheORR,isknowntohaveastronginfluenceontheperformanceanddurabilityoffuelcells.
2.CurrentUnderstandingofH2O2inFuelCells:
H2O2isformedduringtheoxygenreductionreactionduetotheslowreductionofoxygenatthecathode.Itsconcentrationinthecatalystlayerisdependentonvariousfactors,includingoperatingconditions,catalystproperties,andcatalystlayerstructure.HighconcentrationsofH2O2candegradethecatalystperformance,causemembranedegradation,andleadtoreducedcellvoltageoutput.Therefore,accuratemeasurementandcharacterizationofH2O2concentrationareimportantforfuelcellresearchanddevelopment.
3.CharacterizationMethods:
3.1Electrochemicaltechniques:
-CyclicVoltammetry(CV):ThistechniqueprovidesinformationabouttheelectrochemicalbehaviorandkineticsofH2O2inthecatalystlayer.Bymeasuringcurrent-voltagecurves,theconcentrationofH2O2canbeestimatedbasedontheFaraday'slaw.
-RotatingRingDiskElectrode(RRDE):ThismethodallowsforthemeasurementoftheORRandHORseparately,providinginsightsintotheH2O2productionandconsumptionrates.
3.2Spectroscopictechniques:
-InfraredSpectrosc