Kinetics of the Electrocatalytic Oxidation of 2,2-Dimethylolpropionaldehyde

摘要

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 + · OHads→RCHO · OHads was the rate-determining step in the electrolysis process. The rate of this step obtained from the assumed process agrees well with experiment.