作者:Zhenhai Liang、Hongyan Sun
DOI:10.1007/s10953-008-9347-2
日期:2009.1
A new method of synthesis 2,2-dimethylolpropionic acid from 2,2-dimethylolpropionaldehyde was put forward. The electrochemical oxidation behavior of 2,2-dimethylolpropionaldehyde has been investigated on a Ti/SnO2 + Sb2O4/PbO2 electrode by cyclic voltammetry (CV) and stable polarization curves in sulfuric acid. The results showed that it was an irreversible reaction controlled by diffusion. The formation mechanism of 2,2-dimethylolpropionic acid in the sulfuric acid was then proposed and the transfer coefficients of the reaction were calculated. It was concluded that RCHO+ỌHads→RCHOỌHads was the rate-determining step in the electrolysis process. The rate of this step obtained from the assumed process agrees well with experiment.
提出了一种从 2,2-二羟甲基丙醛合成 2,2-二羟甲基丙酸的新方法。通过循环伏安法(CV)和在硫酸中的稳定极化曲线,研究了 2,2-二羟甲基丙醛在 Ti/SnO2 + Sb2O4/PbO2 电极上的电化学氧化行为。结果表明,这是一个由扩散控制的不可逆反应。随后提出了 2,2-二羟甲基丙酸在硫酸中的形成机理,并计算了反应的传递系数。结论是 RCHO+ỌHads→RCHOỌHads 是电解过程中决定速率的步骤。根据假定过程得出的这一步骤的速率与实验结果十分吻合。