纳米TiO_2-Pt复合膜电极间接电催化氧化甘油为甘油醛的研究  

Electrocatalytic oxidation of glycerol to glyceraldehyde on nano TiO_2/Pt electrode

作　　者：秦国旭[1] 张敏[1] 谢聪[1] 任雪宇 张龙飞[1] 胡旭[1] 

机构地区：[1]巢湖学院化学化工与生命科学学院,安徽巢湖238000

出　　处：《应用化工》2015年第2期273-276,共4页Applied Chemical Industry

基　　金：安徽高校省级自然科学基金项目(KJ2013Z232);国家级大学生创新训练项目(201310380023)

摘　　要：运用电沉积法在纳米TiO2膜上电沉积分散的Pt微粒制成钛基纳米TiO2-Pt复合膜（nano TiO2-Pt）修饰电极,采用循环伏安法和电解氧化法,研究了复合膜电极的电催化活性以及氧化甘油为甘油醛的过程。结果表明,纳米TiO2为锐钛矿型,Pt纳米粒子均匀分散在TiO2多孔膜的表面和内部。复合膜电极在常温常压下对甘油的电化学氧化具有高催化活性和稳定性,在25~30℃下,电流密度为25 m A/cm^2时,电流效率达84%,电解产率达89.6%。Nano TiO2-Pt complex catalysts were prepared by electrochemical scan electrodepositing method. The electrocatalytic activity of nano TiO2-Pt complex film electrode was investigated by cyclic voltammetry and bulk electrolysis. The results indicated that the nano TiO2 was anatase and Pt nanoparticles were dispersed uniformly on the surface and interior of TiO2 film. Nano TiO2-Pt complex film electrode exhibited high electrochemical activity and very high electrocatalytic activity for the electro-oxidation of glycerin in atmosphere pressure. The yield and current efficiency was approximately 89. 6% and 84% at 25 ~ 30 ℃and a current density of 25 m A/cm^2,respectively.

关 键 词：甘油醛 甘油 电化学氧化 纳米TiO2-Pt电极 

分 类 号：TQ031.7[化学工程] TQ035