Pt/CNT修饰的TiO_2纳米管在甲醇催化氧化中的应用  

Fabrication and characterization of Pt modified TiO_2 NTs/CNT as anode methanol electrocatalytic oxidation

作　　者：刘绍欢[1] 康青[1] 杨丽霞[1] 蔡青云[1] 

机构地区：[1]湖南大学化学化工学院化学生物传感与化学计量学国家重点实验室,长沙410082

出　　处：《化学传感器》2010年第4期30-35,共6页Chemical Sensors

摘　　要：为了开发TiO2纳米管在电化学中的应用,该文制备了Pt/CNT/TiO2复合电极,研究其作为高效绿色新能源电极材料的应用。以300nm长的TiO2纳米管阵列为基底,聚乙二醇6000为碳源,镍为碳的催化剂,使无序的碳纳米管(CNT)生长在TiO2纳米管阵列的表面,呈现出多孔网络状结构。在CNT/TiO2复合纳米管上应用恒电流法沉积Pt纳米颗粒,使之高度分散在TiO2纳米管的表面。该复合材料具有很好的吸附性和导电性,是一种性能优异的甲醇催化氧化反应(MOR)的新阳极材料。当Pt的负载量为50.52μgcm-2,MOR电流密度高达178.2mA,获得了良好的催化效率。In this paper Pt modified TiO2 nanotube arrays/Carbon Nanotubes（TiO2 NTs/CNT） was applied to methanol electrocatalytic oxidation.With the Polyethylene glycol（PEG） as the carbon source,and the Ni nanoparticles as the carboncatalytic,the TiO2 NTs were successfully modified by the CNTs.The dispersed Pt nanoparticles were electrochemically deposited onto the TiO2 NTs/CNT.As an anode,the performance of the composite are investigated in methanol oxidation reaction（MOR）.When Pt is at 50.52 μg cm-2,the electrocatalysts reaches the highest activity.The enhanced catalytic efficiency is mainly attributed to the superiorly electrical conductivity of the deposited CNT,which facilitates the dispersion of the Pt and the charge transference during the MOR.

关 键 词：TIO2纳米管阵列 甲醇催化氧化 碳纳米管 纳米铂 

分 类 号：TB383.1[一般工业技术—材料科学与工程]