葡萄糖在Ti/NanoTiO_2-ZrO_2修饰电极上电催化氧化

Electrocatalytic Oxidation of Glucose at Ti/NanoTiO_2-ZrO_2 Electrode

在无水乙醇和乙酰丙酮混合溶液中,电解Ti金属制得前驱体Ti（OCH2CH3）4-y（acac）y,再加入ZrCl4,将上述溶液直接水解、干燥后,在450℃煅烧2 h,粉体通过X射线衍射（XRD）分析表明：纳米TiO2-ZrO2粉体呈单分散结构。扫描电子显微镜（SEM）测试表明,颗粒平均尺寸为30-40 nm。通过溶胶-凝胶法制得高活性的Ti/NanoTiO2-ZrO2修饰电极,采用循环伏安研究发现,Ti/NanoTiO2-ZrO2电极对葡萄糖氧化具有高催化活性。在NaBr电解液中,Br-在Ti/NanoTiO2-ZrO2电极表面氧化为Br2,Br2间接电氧化葡萄糖。

Nano-crystalline TiO2-ZrO2 powder was prepared by a direct hydrolysis method and then calcining for 2 h at 450 ℃ from the precursor Ti（OCH2CH3）4-y（acac）y synthesized by electrolysis of titanium in absolute ethanol and acetyl-acetone solution followed by addition of ZrCl4.XRD and SEM results show that the Nano-TiO2-ZrO2 of 30-40 nm is obtained.The highly active Ti/NanoTiO2-ZrO2 modified electrode was prepared by a sol-gel method.The results of cyclic voltammetry show that Ti/NanoTiO2-ZrO2 modified electrode exhibits high electrocatalytic activity for electro-oxidation of glucose.In the NaBr electrolyte,Br-is oxidized to Br2 electrode on the Ti/NanoTiO2-ZrO2 modified electrode surface.Glucose is indirectly electro-oxidized by Br2.