n-TiO_2阴极电沉积纳米金属铂及其电化学特性  

The Preparation and Characterization of Nanocrystalline Pt Films of Titanium Dioxide by Cathodic Electrodeposition

作　　者：姚书典[1] 沈嘉年[1] 孙娟[1] 

机构地区：[1]上海大学材料所

出　　处：《稀有金属材料与工程》2006年第10期1625-1628,共4页Rare Metal Materials and Engineering

基　　金：上海教育委员会青年基金(203170)

摘　　要：用两步法对钛基材进行阳极氧化,然后用阴极电沉积方法制备出纳米级铂镀层Ti/TiO2-Pt阳极,用场发射电子扫描显微镜(SE-SEM)分析了Pt沉积前后的表面形貌,并测试了其晶粒度。结果表明,Pt晶粒度大小为80nm^130nm,阳极不仅具有与铂阳极相似的电化学行为特征,而且通过Pt掺杂明显改善n-TiO2电极的电催化活性,并随着沉积Pt时间的增加,其电催化活性提高。A two-step procedure was used for the preparation of the modified Ti/TiO2-Pt electrodes. The first step was anodisation of the titanium substrate to produce oxide film, and the second step was cathodic deposition Pt. The Ti/TiO2-Pt electrodes with nanocrystalline Pt films were obtained by galvanostatic deposit from H2PtCI4 and HCI solutions containing organic at 298 K-343 K. The mean grain sizes of Pt particles were 80 nm-130 nm. The surfaces of the as-prepared anodes before and after Pt coating were investigated by field emission scanning electron microscope scanning （FE-SEM） and X-ray diffraction （XRD）. The parameters such as temperature and pH were discussed. The results show that the catalytic activity of n-TiO2 is remarkably improved by Pt doping and will increase further with prolonging of Pt deposition time.

关 键 词：纳米 镀铂 钛阳极 

分 类 号：O614.411[理学—无机化学]