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1、物理化學(xué)學(xué)~(WuliHuaxueXuebao1302ActaP．-Chim．Sin．2015，31(2)，302-308February[Article]doi：10．3866／PKU．WHXB20141203l、)l)lrw．whxb．pku．edu．cnPt，TiO2納米纖維的制備及其對(duì)甲醇的電催化氧化活性陳紅王詩(shī)賢趙萬(wàn)隆章能能鄭穎平孫岳明(東南大學(xué)化學(xué)化工學(xué)院，南京21l189)摘要：采用靜電紡絲技術(shù)結(jié)合還原浸漬法制備了Pt／TiO納米纖維電催化劑，通過(guò)X射線衍射(XRD)分析、掃描電鏡(SEM)、透射電鏡(TEM)和X射線能譜(EDS)等測(cè)試手段對(duì)樣品的晶相、形貌、微結(jié)構(gòu)和化
2、學(xué)組成進(jìn)行了表征．測(cè)試結(jié)果表明，TiO納米纖維為銳鈦礦和金紅石組成的混晶，Pt納米顆粒均勻地分布于TiO納米纖維的表面，且P{顆粒大小較均一，平均粒徑為4．0nm。Pt／TiO納米纖維中PI的質(zhì)量分?jǐn)?shù)約為20％．采用三電極體系的循環(huán)伏安和計(jì)時(shí)電流電化學(xué)分析方法研究了樣品在酸性溶液中對(duì)甲醇的電催化氧化活性，結(jié)果表明，與負(fù)載相同質(zhì)量分?jǐn)?shù)Pl的PfP25和商業(yè)Pt／C催化劑相比較，Pt／TiO納米纖維催化劑對(duì)甲醇呈現(xiàn)出較高的電催化氧化活性和更好的穩(wěn)定性．關(guān)鍵詞：靜電紡絲：二氧化鈦納米纖維；Pt納米顆粒；甲醇：催化氧化中圖分類號(hào)：0646PreparationofPt／TiO2Nanofibe
3、rsandTheirEleCtrocatalytiCActivitytowardsMethanolOxidationCHENHongWANGShi·XianZHAOWan·-LongZHANGNeng-NengZHENGYing-PingSUNYue—Ming(CollegeofChemistryandChemicalEngineering,SoutheastUniversity,Nanjing211189,PR．China)Abstract：APt，1-iO2nanofibercatalysthasbeenpreparedthroughthecombinationofanelectr
4、ospinningtechniquewithareductiveimpregnationmethod．Thecompositions．morphologiesandstructuresofthesampleswerecharacterizedbyX-raydiffraction(XRD)，scanningelectronmicroscopy(SEM)，transmissionelectronmicroscopy(TEM)，andenergydispersivespectroscopy(EDS)．TheresultsshowedthatthecrystalphaseoftheTiO2na
5、nofiberswascomposedofanataseandrutileTiO2．PtnanoparticleswerefoundtobeuniformIVdistributedonthesurfaceoftheTiO2nanofiberswithanaveragesizeof4．0nm．ThemassfractionofPtinthePl，_riO2nanofibercatalystwasabout20％．Theelectrocatalyticactivitiesofthesamplestowardstheoxidationofmethanolweremeasuredbycycli
6、cvoltammetryandchronoamperometryusingathree．electrodesysteminanacidicsolution．ComparedwithPt／P25andcommerciaIPt／Ccatalystscontainingthesamequalitypercentage0fPtnanopaRicles．thePt／TiO2nanofibercatalystexhibitedhighercatalyticactivitytowardstheoxidationofmethanoIandbe~erstability．KeyWords：Electros
7、pinning；Ti02nanofiber；PtnanopaRicle；Methanol；CatalyticoxidationReceived：Septemberl8，2014；Revised：December3，2014；PublishedonWeb：December32O14．．CorrespondingIduthors．ZHENGYing-Ping，Email：ypz_99@163．com；Tel：+86·25—52090619．SUNY
