2-甲基吡啶在不同有机物/水混合溶剂中的电氧化研究

通过循环伏安、线性扫描伏安测量和恒电位电解实验, 在以质子交换膜为隔膜的电解槽内, 分别以丙酮、乙腈和2-丁酮3种有机物与水作混合溶剂, 研究了2-甲基吡啶在PbO2电极上的电氧化行为. 与纯水溶剂比较发现, 在丙酮与水混合溶剂中, 2-甲基吡啶电氧化生成2-吡啶甲酸的选择性和电流效率最高, 阳极氧化电流密度也明显提高, 完全可以替代在纯水溶液中进行2-甲基吡啶电氧化反应.

Electrooxidation of 2-Picoline in Different Organic Compound/Water Mixed Solvents

In an electrolytic cell with proton exchange membrane as the diaphragm, the electrooxidation conditions of 2-picoline at a PbO2 electrode were studied by using cyclic voltammetry, linear scan voltammetry and potentiostatic electrolysis in acetone/H2O, acetonitrile/H2O and 2-butanone/H2O mixed solvents respectively, and after comparison of the selectivity, the current efficiency and the current density, it was found that in acetone/water mixed solvents the selectivity and the current efficiency of electrooxidation from 2-picoline to 2-pyridinecarboxylic acid were the highest , the current density of anode oxidation was also obviously increased. The electrooxidation from 2-picoline to 2-pyridinecarboxylic acid in acetone/water mixed solvents can completely replace to that in pure water.