间接电氧化法合成甘油醛  

Synthesis of Glyceraldehydes by Indirect Electro-oxidation

作　　者：万新军[1] 宋明友[1] 吴蓉[1] 褚道葆[2] 

机构地区：[1]巢湖学院化学系,巢湖238000 [2]安徽师范大学化学与材料科学学院

出　　处：《应用化学》2003年第6期578-581,共4页Chinese Journal of Applied Chemistry

基　　金：安徽省教育厅自然科学基金 ( 2 0 0 1kj179)资助项目

摘　　要：通过电化学合成前驱体和溶胶 凝胶法在Ti表面修饰一层纳米TiO2 膜 ,在纳米TiO2 膜上电沉积分散的Pt微粒制成钛基纳米TiO2 Pt(Ti/nano TiO2 Pt)修饰电极。采用循环伏安法、间接电氧化法研究了纳米TiO2 Pt修饰电极的电催化活性以及Mn3 + /Mn2 + 媒质氧化甘油为甘油醛的过程。结果表明 ,纳米TiO2 Pt修饰电极对Mn2 + 的电氧化具有高催化活性 ,电流效率可达 90 %以上 ,非均相电解得到的Mn3 + 可一步氧化甘油为甘油醛 ,收率为 91%。The precursor Ti(OEt) 4 was prepared by anodic dissolution of Ti in absolute ethanol and directly hydrolyzed to give nanocrystalline TiO 2 film on titanium electrode(Ti/nano TiO 2 ) by a sol gel process. The nanocrystalline TiO 2 Pt modified titanium(Ti/nano TiO 2 Pt) electrode was prepared by electrodeposition of Pt on nanocrystalline TiO 2 film. Electrocatalytic activity of the Ti/nano TiO 2 Pt electrode for oxidation of Mn 2+ to Mn 3+ and synthesis of glyceraldehydes were investigated by cyclic voltammetry and indirect electro oxidation methods. Mn 3+ could be regenerated by electrolysis at Ti/nano TiO 2 Pt anode in heterogeneous MnSO 4 / H 2 SO 4 medium with current efficiency over 90%. Glyceraldehyde was prepared in yield of 91% by the proposed method.

关 键 词：甘油醛 间接电氧化合成 钛基纳米TiO2-Pt电极 

分 类 号：O646.5[理学—物理化学]