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1、AppliedCatalysisB:Environmental91(2009)470–480ContentslistsavailableatScienceDirectAppliedCatalysisB:Environmentaljournalhomepage:www.elsevier.com/locate/apcatbInfluenceofthecrystallinephaseandsurfaceareaoftheTiO2supportontheCOoxidationactivityofmesoporousAu/TiO2catalys
2、tsaabcccba,*Y.Denkwitz,M.Makosch,J.Geserick,U.Ho¨rmann,S.Selve,U.Kaiser,N.Hu¨sing,R.J.BehmaInstituteofSurfaceChemistryandCatalysis,UlmUniversity,D-89069Ulm,GermanybInstituteofInorganicChemistryI,UlmUniversity,D-89069Ulm,GermanycCentralFacilityofElectronMicroscopy,UlmUn
3、iversity,D-89069Ulm,GermanyARTICLEINFOABSTRACTArticlehistory:TheinfluenceoftheTiO2crystallinephaseandofthesurfaceareaontheactivityandstability/Received13March2009deactivationbehaviorofstructurallywell-definedmesoporousAu/TiO2catalystswithcomparableAuReceivedinrevisedform
4、15June2009loadingintheCOoxidationreactionwasinvestigatedbykineticmeasurementsunderdifferentialAccepted18June2009reactionconditionsandbyinsituDRIFTS.ThecrystallinephaseandsurfaceareaoftheTiO2substrateAvailableonline24June2009werecontrolledbythepHandthetypeofthestructure
5、-directingsurfactantsappliedinthesynthesis.Auloadingofthemesoporousoxideswasperformedbythesamedeposition–precipitationprocedureforallKeywords:catalysts.TheresultingtrendsintheCOoxidationbehavior,includingtheTOFbasedactivitiesandtheMesoporouscatalystsstability/deactivat
6、ionbehaviorarediscussed.Activityß2009ElsevierB.V.Allrightsreserved.DeactivationAu/TiO2COoxidation1.Introductionthattheactivityofnon-porousAu/TiO2catalystsdecreasedfrombrookiteviaanatasetorutileforcatalystsactivatedbycalcinationatOxidesupportedAucatalystshavebeendemonst
7、ratedtobe3008C,whileafterreductionat1508Ctheactivitieswerecompar-highlyactivealreadyatlowtemperaturesforvariousoxidationandable[25],andsimilarobservationswerereportedbyYanetal.forreductionreactions,mostprominentlytheCOoxidationreaction[1–mesoporousTiO2supportedcatalyst
8、s[26].Theseauthorsexplained3],whichinturnisofinterestinenvironmentalcatalysisthisbyanincreasingtendencyforAuparticles
