摘要
在三电极测试体系中对所制备的In及In-Sn电极分别进行了电还原CO2的动力学参数测试。通过极化曲线测试了这2种电极的电荷传递系数α及交换电流密度i0。In及In-Sn电极上电还原CO2的电荷传递系数分别为0.0695和0.0423,交换电流密度分别为0.463 A/m2和6.665 A/m2。通过交流阻抗谱测试了In及In-Sn电极电还原CO2的法拉第阻抗,分别为13.972Ω和10.466Ω,In-Sn电极上的表面电容大于In电极。测试结果说明了In-Sn电极的电活性要高于In电极,电极比表面积的不同可能是导致电极活性高低的重要原因。
In three-electrode testing system,the electrochemical dynamics parameters of electrochemical reduction of CO2 on In and In-Sn electrodes were tested.Charge transfer parameter and exchange current density were obtained through methods of polarization curve testing,the charge transfer parameters were 0.0695 and 0.0423,the exchange current density parameters were 0.463 A/m^2 and 6.665 A/m^2.Reduction resistance was obtained through methods of electrochemical impedance spectroscopy testing,the reduction resistance parameters were 13.972 Ω and 10.466 Ω,the surface capacitance of In-Sn electrode is bigger than In electrode.The results show that,In-Sn electrode has relatively higher activity,because it may have higher specific surface area.
出处
《舰船科学技术》
2010年第12期46-50,共5页
Ship Science and Technology
关键词
CO2
电还原
铟
铟-锡
动力学参数
carbon dioxide
electrochemical reduction
In
In-Sn
dynamics parameter
