使用新颖的纳米结构电极成对电合成葡萄糖酸锌和丁二酸.采用溶胶-凝胶法制备Ti基纳米TiO2(Ti/nanoTiO2)电极,同时采用电沉积法制备Ti基纳米TiO2-Pt(Ti/nanoTiO2-Pt)修饰电极.通过循环伏安研究发现,Ti/nanoTiO2-Pt电极对葡萄糖氧化及Ti/nanoTiO2电极对马来酸还原均具有高催化活性.以Ti/nanoTiO2-Pt电极为阳极、Ti/nanoTiO2电极为阴极,通过正交实验得到成对电合成葡萄糖酸锌和丁二酸的优化条件为:阳极和阴极电流密度分别为1.2A·dm^-2和3.0A·dm^-2,阳极液为0.4mol·L^-1葡萄糖+0.6mol·L^-1NaBr,阴极液为0.6mol·L^-1马来酸+0.2mol·L^-1NaCl,温度50℃.成对电合成的总电流效率达到170%.
A paired electrosynthesis of zinc gluconate and succinic acid using novel nano-electrodes was studied.A Ti/nanoTiO2 electrode and a nanoTiO2 film loaded Pt nanoparticle electrode(Ti/nanoTiO2-Pt) were prepared by a sol-gel method and an electrochemical deposition technique.The results of cyclic voltammetry showed that the Ti/nanoTiO2-Pt electrode as anode and the Ti/nanoTiO2 electrode as cathode exhibited high electrocatalytic activity for electro-oxidation of glucose and electro-reduction of maleic acid respectively.According to the orthogonal experiment,the optimum conditions obtained were as follows:anodic and cathodic current density at 1.2 and 3.0 A·dm^-2 respectively,0.4 mol·L^-1 glucose and 0.6 mol·L^-1 NaBr in anodic electrolyte,0.6 mol·L^-1 maleic acid and 0.2 mol·L^-1 NaCl in cathodal electrolyte,and the temperature at 50 ℃.Total current efficiency attained to 170%.