有机小分子在铂基电极上吸附和反应的电化学和SERS分析

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1、AbstractThemainpurposeofthepresentworkistoinvestigatedissociativeandadsorptionofethanolatroughenenplatinmandPt—Ruelectrodes，todeviseasimpleandefficientmeasuretosynthesizeplatinum-·basednano—-electrocatalystsandpreparethePt—basednanoparticlesmodifiedGCel

2、ectrode．Theelectro—catalyticbehaviorofsomeorganicmoleculessuchasformicacid，methanolandCOatthesePt—basedelectrodeswasstudiedandSurfaceEnhancedRamanspectroscopy(SERS)wasextendedtoinvestigatetheelectro-catalyticbehavioroforganicsmallmoleculesonPt-basednano

3、particlessupportedGCsurface．Theirstructure，size．opticalandelectronicpropertiesweresystematicallycharacterizedandestimatedbyTEM、XRD、SAED、UV-Visible、AFM．Theseelectro．catalyticandSERSbehaviorsoforganicsmallmoleculeswasinvestigatedbycombiningconventionalele

4、ctrochemicalmethodswithSurfaceEnhancedRamanspectroscopy(SERS)。Thethesismainlyconsistsofthefollox_ingfourparts：1．ThebehaviorsofadsorptionandoxidationofethanolonarougheningplatinumelectrodewithhighactivityofSERSwerestudiedbyusingcyclicvoltammetryandin—sit

5、usurfaceenhancedRmnanspectroscopybecauseofthekeyrolesofinthedirectalcoholfuelcell(DAFC)．Theeffectoftheroughenedfactor,theinitialconcentrationofethanol，theelectrodepotentialondissociativeadsorptionofethanolinanacidsolutionwerosystematicallydiscussedbycar

6、efullydesigningpotentialprogramme。AssistedbythehighlysensitiveconfoealmicroprobeRamanspectrometerandpropersurfacerougheningprocedure，surfaceRamanspectraofdissociativeadsorptionofethanolonPtelectrodewereobminedforthefirst。TheinvestigationalsoshowsthatpHa

7、ndelectrolyteshaveamarkedinfluenceonthedissociativeadsorptionofethanolontherougheningplatinumsurface．Itwerefirstlyfoundthatethanolcanbeself-dissociatedtoproducepoisoningintermediateCOatleast，whichdiscouragethefurtheroxidationofethanol，someinformationofP

8、t—CandPt—C·Ptstretchingvibrationfromlinearly-adsorbedandbridged—adsorbedCOlocatedinlowfrequencywereexan{ined，respectively．Theinvestigationalsoshowsthattheelectro—oxidationAbstractofethanolontheroughenedplatinumwasadiffuse—control