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1、ElectrochimicaActa138(2014)468–475ContentslistsavailableatScienceDirectElectrochimicaActajournalhomepage:www.elsevier.com/locate/electactaPhotoinduceddepositionofpalladiumnanoparticlesonTiO2nanotubeelectrodeandinvestigationofitscapabilityforformaldehydeoxidationReza∗Ojani,Jahan-BakhshRaoof
2、,SaeidSafshekanElectroanalyticalChemistryResearchLaboratory,FacultyofChemistry,UniversityofMazandaran,Babolsar,IranarticleinfoabstractArticlehistory:HighlyorderedpalladiumnanoparticlemodifiedTiO2nanotubeelectrode(Pd/TiO2NT/Ti)waspreparedReceived2January2014byelectrochemicalanodizationofaTis
3、heet,followedbyphotocatalyticreductionprocessinpalladiumReceivedinrevisedform18May2014chloridesolution.ThepreparedelectrodeswerecharacterizedbySEM,EDX,andEIStechniques.Theelec-Accepted20June2014trocatalyticoxidationofformaldehydeatthesurfaceofPd/TiO2NT/Tiwasstudiedbycyclicvoltammetryonline
4、28June2014Availableandchronoamperometrymethods.OxidationofformaldehydewaswellevidencedbyappearanceoftwowelldefinedanodicpeaksintheforwardandbackwardscansduringCVexperiments.EffectsofsomeKeywords:parametersincludingformaldehydeconcentration,scanrate,andupperpotentiallimitontheelectroox-Elect
5、rooxidationidationperformanceofelectrodewereinvestigated.IncomparisonwithsomeofthepreviouslyreportedTiO2nanotubeFormaldehydeelectrodes,thePd/Ti/TiO2NTsanodeexhibitedsuperiorperformanceforelectrooxidationofformalde-hydewithaveryVoltammetrylowoverpotentialandhighcurrentdensity.Thiselectrodes
6、howedagoodstabilityPhotoreductionduringexperimentsandafterstorageforalongtimeindrycondition.©2014ElsevierLtd.Allrightsreserved.1.Introductionparticlesonthesuitablesupportwithhighersurfacearea.Infact,thechoiceofasuitablesupportingmaterialisanimportantfactorOverthepastdecades,therehasbeenext
7、ensiveinterestinthatmayaffecttheperformanceofsupportedcatalysts,owingtodevelopmentofhighlyactiveelectrodematerialsforelectrochem-thesupport–catalystinteractionsandsurfacereactivity[8,9].icaloxidationofsmallorganicmoleculessuchasCH3OH,HCOOH,Ontheotherhand,TiO2n