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1、物理化學(xué)學(xué)~(WuliHuaxueXuebao)SeptemberActaPhys.一Chim.s2014,30,1681-16871681[Article]doi:10.3866/PKU.WHXB201406193www.whxb.pku.edu.cn單分散PtNi納米粒子特殊的紅外光學(xué)性能周新文’杜娟娟孫世剛,r‘三峽大學(xué)生物與制藥學(xué)院,湖北宜昌443002;。廈門(mén)大學(xué)固體表面物理化學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室,化學(xué)化工學(xué)院化學(xué)系,福建廈門(mén)361005)摘要:采用電位置換反應(yīng)以及化學(xué)還原法制備了單分散PtNi納米粒子,循環(huán)伏安結(jié)果顯示該納米粒子在0.1too
2、l·L硫酸介質(zhì)中對(duì)CO的氧化表現(xiàn)出比本體Pt電極更好的電催化活性.以CO為探針?lè)肿?,采用電化學(xué)原位紅外光譜研究了PtNi納米粒子上的特殊紅外光學(xué)性能.結(jié)果表明,PtNi納米粒子無(wú)論是在玻碳電極還是在金電極上,均表現(xiàn)出對(duì)稱(chēng)的雙極譜峰,同時(shí)給出很強(qiáng)的增強(qiáng)效應(yīng).論文研究結(jié)果有助于進(jìn)一步了解低維納米材料特殊紅外性能的本質(zhì).關(guān)鍵詞:電位置換反應(yīng):?jiǎn)畏稚tNi納米粒子:雙極紅外特征:原位電化學(xué)傅里葉變換紅外光譜中圖分類(lèi)號(hào):0646AnomalousIROpticalPropertiesofMonodispersedPtNiNanoparticlesZHOUXi
3、n—Wen’。DUJuan-Juan’SUNShi—Gang·‘pCollegeofBiologicalandPharmaceuticalScience,Chin8ThreeGorgesUniversity,Yichang443002,HubeiProvince,PR.China;2DepartmentofChemistry,CollegeofChemistryandChemicalEngineering,StateKeyLaboratoryolPsicalChemistryofSoziaSurface,XiamenUniversity,Xiamen
4、361005,Fuj~nProvince,PR.ChinaAbstract:MonodispersedPtNinanoparticlesweresynthesizedbygalvanicdisplacementreactionandchemicaIreduction.Them0nOdispersedPtNinanoparticlesdemonstrate,bycyclicvoltammetry,enhancedelectrocatalyticpropertiesforCOoxidationin0.1mo1.L。’H2SO4solutioncompar
5、edwithbulkPtelectrode.InsituelectrochemicaIFouriertransforminfrared(FTIR)spectroscopyusingCOastheprobemoleculewasstudied.TheCOadsorbedoneitherthePtNi/GC(glassycarbon)electrodeorPlNi/AuelectrodeexhibitscharacteristicsofasymmetricbipolarIRfeaturewithastrongenhancementfactor.There
6、sultsofthispapercontributetotheunderstandIngofthespecialpropertiesandoriginoftheanomalouslRpropertiesofIow—dimensionaInanomaterials.KeyWords:Galvanicdisplacementreaction;MonodispersedPtNinanoparticle;BipolarIRfeatureInsituelectrochemicalFTIRspectroscopy1lntroductionasacathodeca
7、talystforelectro-reductionofoxygen.’ThesePlatinum.nickel(PtNi)alloynanoparticleshaveapotentialelectrocatalyticpropertiesarehighlydependentonthesize,shape,applicationinhighdensitydatastorageandareusedasanodeandcompositionofthePtNinanoparticles.Geometryofacatalystsandcathodecatal
8、ystsinfuelcel1.Forexample.PtNinanomagnethasgreatimpact