在汞电极上电还原糖得到相应多元醇的研究

Electroreduction Sugars to Polyalcohols from Alkaline Aqueous Media on Mercury Electrodes

摘要: 研究了在碱性介质中汞电极上电还原单糖、二糖得到相应的多元醇。实验结果表明,电极过程由在汞表面吸附糖的电子转移及动力学混合控制。但电位电解的结果显示,其电解选择性为100%,对乳糖、葡萄糖及果糖的电流效率分别为60%、74%及80%,其电解产物为相应的多元醇。并报道了二糖的电还原研究结果,提出了糖类电还原机理。

Abstract: A polarographic investigation of direct electroreduction disaccharide and monosaccharide on DME to corresponding polyalcohols in alkaline acquous media is described. The experimental results show that the electrode process is controlled by the mixture control of charge transfer and kinetical steps with the adsorption of sugar to the surface of mercury electrode. A practically 100% yield in corresponding polyalcohols and 60%, 74% and 83% yield in current for lactose, glucose and fructose respectively are realized. Specially, the investigation results of electroreduction disaccharide are reported in this paper.The possible electroreduction mechanism of sugars is proposed.