Cu-PTFE修饰电极对水杨醛的电还原作用

Electrochemical Reducing Action of Salicylaldehyde on Cu-PTFE Modified Electrode

以纯铜片为基材,利用复合电镀法制得PTFE修饰的Cu-PTFE(聚四氟乙烯)复合电极,并作为阴极将水杨醛电还原为水杨醇.分别测定了Cu-PTFE修饰电极在水杨醛电解液中的循环伏安(CV)、Tafel极化曲线和交流阻抗(EIS)等电化学参数以及电化学过程的相关数据.结果表明,Cu-PTFE修饰电极对水杨醛的电还原有良好的催化活性,依据电化学过程的研究结果推测,水杨醛在修饰电极上的电化学过程受电子迁移和浓差扩散的混合控制,其电还原过程的转化率达80.36%.结合FT-IR和1HNMR对水杨醛电还原得到的产物水杨醇进行表征,进一步表明Cu-PTFE修饰电极对水杨醛电还原制备水杨醇具有实际的应用价值.

Modified Cu-polytetrafluoroethylene （Cu-PTFE） composite electrode was prepared by composite electroplating process using copper as substrate, and the modified electrode was uti- lized for eleetroreduction from salicylaldehyde to salicyl alcohol as cathode. The cyclic voltammo- gram （CV）, Tafel polarization curve, electrochemical impedance spectroscopy （EIS） and related data of the electroduction process on the modified electrode in salicylaldehyde electrolyte were meas- ured. The result showed that Cu-PTFE modified electrode had been excellent catalytic activity for electroreduction from salicylaldehyde to salicyl alcohol. The investigation of the electroreduction process suggested that the process should be controlled by both electron transfer process and concen- tration diffusion process, and the conversion rate of the process was up to 80. 36%. Based on meas- urements of FT-IR and 1HNMR spectra of the product salicyl alcohol, it＇s significant that the prep- aration of salicyl alcohol had been actual application value from the electroreduction of salicylalde- hyde on the Cu-PTFE modified electrode.