中文摘要：

采用溶胶-凝胶和电沉积法制备Ti基纳米TiO2-Pt（Ti/纳米TiO2-Pt）修饰电极.X射线衍射（XRD）表明纳米TiO2为锐钛矿型,扫描电镜（SEM）显示Pt纳米粒子在纳米TiO2多孔膜的表面呈现簇分散状态,平均粒径约25nm.通过循环伏安（CV）和计时电流法研究了Ti/纳米TiO2-Pt修饰电极对乙二醛直接电氧化的电催化活性,结果表明,修饰电极对乙二醛的直接电氧化呈现良好的催化活性,在0.60和1.23V（vsSCE）出现两个氧化峰,二者电流密度分别为16和42mA·cm-2,约为纯Pt电极的2倍和1.5倍,反应过程受浓差扩散控制.

英文摘要：

A nano-TiO2 film electrode loaded with Pt nanoparticles （Ti/nanoTiO2-Pt） was prepared by a sol-gel method and electrochemical deposition technique. The formation of an anatase phase of TiO2 was confirmed by X-ray diffraction （XRD）. Scanning electron microscopy （SEM） images showed that cluster scattered state Pt particles were distributed on the surface of the multi-nanoporous TiO2 film and the average particle size of Pt particles was about 25 nm. The electrocatalytic oxidation of glyoxal on the Ti/nanoTiO2-Pt modified electrode was investigated by cyclic voltammetry （CV） and chronoamperometry. The results showed that the Ti/nanoTiO2-Pt modified electrode exhibited significant electrocatalytic activity for the oxidation of glyoxal. The oxidation peak potentials were 0.60 and 1.23 V （vs SCE （saturated calomel electrode））. Current densities were 16 and 42 mA. cm-2, respectively, and they were about 2 and 1.5 times as high as those of a pure Pt electrode. The reaction process was controlled by concentration diffusion.