In及In-Sn电极电还原CO2的研究

CO2电还原技术在降低"温室效应"、缓解能源危机及消除密闭环境的CO2等方面都有很重要的意义.本文利用电沉积的方法制备了用于电还原CO2的In及In-Sn电极,在三电极测试体系及电解槽中,对所制备的电极进行活性及稳定性测试.在常温常压和2 000 A·m-2的电流密度下,所制备的In和In-Sn电极(43 cm2)电还原CO2,生成HCOOH的速率分别达到0.585 L·h-2,0.922 L·h-2.在40 h的电解测试中,两者皆具有较好的稳定性.In-Sn较In具有更高的CO2电还原活性,是一类更具应用前景的电极.

Electrochemical reduction of CO2 on In and In-Sn electrodes

The technology of electrochemical reduction of CO2 is significant for reducing greenhouse effect, relieving energy crisis and eliminating CO2 in spacecraft or submarine. In this paper, In and In-Sn electrodes used in electrochemical reduction of CO2 have been prepared by electroplating method. In three-electrode and cell testing systems,the activity and stability of In and In-Sn electrodes are tested. At normal stability during 40 hours electrolysis testing. The results show that, In-Sn electrode has higher activity and better prospect of application in electrochemical reduction of CO2.