CeO2催化剂及其CO氧化性能的对比研究-论文.pdf

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1、ChineseJournalofCatalysis35(2014)1347—1358催化学报2014年第35卷g8期1www．chxb．cnava．1abIeatwww．sciencedirect．com’：，ScienceDireCtJournaIhomePage：www．eJsevier，com／Iocate／chnjcArticle(SpecialIssueonRareEarthCatalysis)ComparativestudyonthecatalyticCOoxidationpropertiesofCuO／CeO2catalystsprepare

2、dbysolidstateandwetimpregnationJingfangSun，LeiZhang，ChengyanGeb，ChangjinTang．-．，LinDong，，a]iangsuKeyLaboratoryofVehicleEmissionsControl,CenterofModernAnalysis,NanjingUniversity,Nanjing210093,]iangsuChinaKeyLaboratoryofMesoscopicChemistryofMin&tryofEducation,SchoolofChemistryandChe

3、micalEngineering,NonjingUniversity,Nanjing210093]iangsuChinaARTICLEINFOABSTRACTArticlehistory：AseriesofCuO／Ce02catalystswerepreparedbysolidstateimpregnation(SSI)andwetimpregnaReceived3April2014tionfWI1methodsandcharacterizedbyX-raydiffraction，Hztemperature-programmedreductionAccep

4、ted5May2014(H2-TPR)，laserRamanspectroscopy(LRS)，insitudiffusereflectanceinfraredFouriertransformPublished20August2014spectroscopy(insituDRIFTS)andX-rayphotoelectronspectroscopy(xPs)．xPsandH2‘TPRresultsshowedthatSSIincreasedthedispersionofthecopperspeciesonthecatalystsurface，whichb

5、ene—fitedthereductionofCuOspecies．LRSresultsindicatedthatahigherconcentrationofoxygenvaKeywords：cancieswasobtainedbytheSSImethodunliketheWImethod．COoxidationresultsshowedthatatCarbonmonoxideoxidationagivenCuOloading，theactivityofthecatalystspreparedbySS1washigherthanthatoftheircou

6、nCopperoxideteartspreparedbyWI．BasedonthecombinedcharacterizationresultsitwassuggestedthattheCeriumoxideenhancedactivitywascloselyrelatedtothehigherconcentrationsofoxygenvacanciesandCu·COSolidstateimpregnationspeciesonthecatalysts．Last，apossiblesynergeticmechanismwasproposedforCOo

7、xidationoverWetimpregnationtheCuO／CeO2catalysts．Synergisticmechanism⑥2014DalianInstituteofChemicalPhysics，ChineseAcademyofSciences．PublishedbyElsevierB．V．Allrightsreserved．1．1ntroductionbeanexcellentcandidateforCOoxidation【7】．Especially，ithasbeenreportedthatwhenCuOiSsupportedoverr

8、educibleoxInrecentyears，catalytic