以电合成前驱体Ti(OEt)4直接水解法和电化学扫描电沉积法制备Ti基纳米TiO2-CNT-Pt(Ti/nanoTiO2-CNT-Pt)复合电极.透射电镜(TEM)和X射线衍射(XRD)测试表明,锐钛矿型纳米TiO2粒子(粒径5～10nm)和碳纳米管(CNT)结合形成网状结构,Pt纳米粒子(平均粒径9nm)均匀地分散在纳米TiO2-CNT复合膜表面.循环伏安及计时电流测试表明,Ti/nanoTiO2-CNT-Pt复合电极具有高活性表面,对甲醇的电化学氧化具有高催化活性和稳定性,Pt载量为0.32mg/cm2时,常温常压下甲醇氧化峰电流达到480mA/cm2.
The nanoTiO_(2)-CNT-Pt on Ti substrate complex electrodes were prepared from precursor of (Ti(OEt)_(4)) directly hydrolyzed and by cyclic voltammograms electroplating method . The XRD and SEM results showed that the nano TiO_(2) (anatase) particle sizes ranged 5~10 nm and the Pt nanoparticle (average size 9nm) dispersed uniformly on nanoTiO_(2)-CNT film surface. The electrocatalytic activity of Ti/nanoTiO_(2)-CNT-Pt electrode was investigated by cyclic voltammetry and chronopotentiogram. The results indicated that the Ti/nanoTiO_(2)-CNT-Pt electrode exhibited very high electrocatalytic activity and stability for the electro-oxidation of methanol at room temperature. When Pt loading was 0.32 mg/cm~(2), the oxidation peak current of methanol was 480 mA/cm~(2).
[1]O'ReganB,Gr tzelM.Alow cost,high efficiencysolar cellbasedondye sensitizedcolloidalTiO2films[J].Nature,1991,353:737～739.
[2]CuiXL,JiangZY.SynthesisofnanocrystallineTiO2film[J].ProgressinChemistry(inChinese),2004,14(5):325～331.
[3]MbindyoJKN,RuslingJF.Catalyticelectrochemical synthesisusingnanocrystallinetitaniumdioxidecathodes inmicroemulsions[J].Langmuir,1998,14:7027～7033.
[4]ChuDB(褚道葆),WangFW(王凤武),WeiYJ(魏亦军),etal.Electrocatalyticactivitiesandprepa rationofnanocrystallineTiO2Ptmodifiedelectrode[J].ActaPhysico ChimicaSinica,2001,18(4):212～214.
[5]RojasMI,EsplandiuMJ,AvalleLB,etal.Theoxy genandchlorineevolutionreactionsattitaniumoxidee lectrodesmodifiedwithplatinum[J].Electrochimica Acta,1998,43(12～13):1785～1794.
[6]LiuCP(刘长鹏),YangH(杨辉),XingW(邢巍),et al.Themethanolelectrooxidationattitaniumoxideelec trodesmodifiedwithPt、Ru[J].Appl.Chem.,2001,18(7):517～520.
[7]ChuDB(褚道葆),ShenGX(沈广霞),ZhouXF,(周幸福),etal.Electrocatalyticactivityofnanocrys tallineTiO2filmmodifiedTielectrode[J].Chem.J.ChineseUniversities,2002,23(4):678～681.
[8]ChuDB(褚道葆),ShenGX(沈广霞),ZhouXF(周幸福).PrepartionofTi BasednanocrystallineTiO2filmelectrodewithhighactivity[J].Electrochemistry(inchinese),2001,7(2):249～252.
[9]RuoffRS,LorentsDC.Methanicalandthermalproper tiesofcarbonnanotubes[J],Carbon,1995,33:925～930.
[10]SatioR,FujianM,DresselhausG,etal.Electronis structureofgraphemetubulesbasedonC60[J].Phys.Rev.,1992,46:1804～1811.
[11]EbbesenTW,AjayanPM.Large scalesynthesisof carbonnanotubes[J].Nature,1992,358:220～222.
[12]CheG,LakshmlBB,FlsherER,etal.Carbon nanotubulemembranesforelectrochemicalenergystor ageandproduction[J].Nature,1998,393:346～349.
[13]ZhuH(朱红),GeFJ(葛奉娟),KangXH(康晓红),etal.Thestudyoncarbonnanotube loadedPt catalystsforprotonexchangemembranefuelcells[J].Electrochemistry(inchinese),2003,9(4)445～450.
[14]HonmaI,TodaT.Temperaturedependenceofkinetics ofmethanolelectro oxidationonPtSnalloys[J].J.Electrochem.Society,2003,150(12):A1689～A1692.
[15]HeQG(和庆钢),YuanXZ(袁晓姿),YuanXX(原鲜霞),etal.Preparation,structureandelectrochemicalhydrogenationofcarbonnanotubessupported platinumcatalysts[J].Electrochemistry(inchinese)200410(1):51～58.
[16]HeZ,ChenJ,LiuD,etal.Depositionandelectro catalyticpropertiesofplatinumnanoparticalsoncarbon nanotubesformethanolelectrooxidation[J].Materials Chem.andPhysics,200485:396～401.
[17]ChuDB(褚道葆),ZhouXF(周幸福),LinCJ,(林昌健),etal.Directelectrochemicalsynthesisof metalalkoxides[J].Chem.J.Chin.Univ.,2000,21(1):133.
[18]ZhouXF,ChuDB.Anodicdissolutionofspongytita niuminethanolsolutionforpreparationofnano sized TiO2Powder[J].ElectrochimicaActa,2002,47:2769～2773.
[19]GuJS(顾家山),ChuDB(褚道葆),ZhouXF(周幸福),etal.Heterogeneouselectrocatalyticre ductionofmeleicacidonnanocrystallineTiO2film modifiedTielectrode[J].ActaChimicaSinica,2003,61(9):1405～1409.
[20]BardAJ,FaulknerLR.ElectrochemicalMethods[M].NewYork:Wiley,1980.538.
[21]YangH(杨辉),XueKH(薛宽宏),LuTH(陆天虹),etal.Electrocatalyticoxidationofmethanolat thetitaniumoxideelectrodemodifiedwithPtmicropar ticles[J].Chem.J.Chin.Univ.,1998,19(8):1320～1322.
[22]ChenWX(陈卫祥),JimYL,LiuZL(刘昭林).Microwave assistedsynthesisofcarbonsupportedPt nanoparticlesforfuelcellapplications[J].Chem.Commum,2002,4:19～24.
[23]TianFM,FalconerJL.MethanationsitesonaPt/TiO2catalyst[J].JournalofCatalysis,1990,123:443～445.
[24]PengC(彭程),ChengX(程璇),ZhangY(张颖),etal.ComparisonofMethanolElectrooxidationonCar bonPtandPtRuCatalyst.[J].TheJournalofPhysi calChemistry,2004,20(4):436～439.
