水系体系中CO2在稀土（Nd）（Ⅲ）双酞菁修饰电极上的电催化还原研究

Electrocatalytic Reduction of CO2 at Rare Earth （Nd） （Ⅲ） Diphthalocyanine Modified Electrode in Aqueous Solution

探讨了CO2在稀土(Nd)(Ⅲ)双酞菁修饰电极上的电催还原行为。通过滴涂法将稀土(Nd)(Ⅲ)双酞菁担载在玻碳电极上制备成它的修饰电极,在水溶液中利用循环伏安、红外光谱法等方法研究制备的修饰电极对CO2的电催化还原性能。结果表明,所制备的稀土(Nd)(Ⅲ)双酞菁修饰电极对CO2的电催化还原有较高的活性,还原电流随修饰量增加而变大,修饰电极的还原电流与溶液的pH值有关,随着pH值变大,还原峰向负方向移动。实验结果表明,稀土(Nd)(Ⅲ)双酞菁修饰电极对二氧化碳电化学还原具有很好的电催化活性,在该修饰电极上,CO2可在较正的电位下被还原。

The aim of this study was to investigate the electrocatalytic reduction of CO 2 at rare earth (Nd)(III) diphthalocyanine modified electrodes. Rare earth (Nd)(III) diphthalocyanine was loaded on glassy carbon electrode by dropping coating method to prepare its modified electrode. The electrocatalytic reduction performance of the modified electrode for CO 2 was studied by cyclic voltammetry and infrared spectroscopy in aqueous solution. The results show that the rare earth (Nd)(III) diphthalocyanine modified electrode prepared in this study has high activity for the electrocatalytic reduction of CO 2. The reduction current increases with the increase of the modification amount. The reduction current of the modified electrode is related to the pH value of the solution. As the pH value increases,the reduction peak moves to the negative direction. The experimental results show that the rare earth (Nd)(III) diphthalocyanine modified electrode has good electrocatalytic activity for the electrochemical reduction of carbon dioxide. On the modified electrode,CO 2 can be reduced at a relative positive potential.