不同Ti基复合电极材料的电化学性能研究

发布时间：2018-07-01 10:00

  本文选题：复合材料 + 脉冲电沉积　； 参考：《表面技术》2017年08期

【摘要】：目的制备具有良好电催化活性和耐腐蚀性能的Ti/Pb-WC-PANI复合材料,用作锌电积过程中的电极材料,达到降低能耗的目的。方法在Ti基上采用脉冲电沉积法,以纯铅作为打底层,再沉积Pb-WC-PANI。通过对脉冲Pb-WC-PANI复合镀层、直流Pb-WC-PANI复合镀层、铅银合金以及纯铅的稳态极化曲线、循环伏安曲线和电化学阻抗谱的对比分析,研究其析氧电催化活性,利用塔菲尔曲线研究其腐蚀性能。结果在电流密度2 A/dm~2,正向导通时间0.3 ms,周期1.5 ms,工作时间200 ms,磁力搅拌,25℃施镀1.5 h的工艺条件下制备铅底层,再在脉冲平均电流密度2 A/dm~2,脉宽0.3~0.5 ms,脉冲周期1.5 ms,25℃沉积1 h的工艺条件下镀Pb-WC-PANI,得到Ti/Pb-WC-PANI复合材料。其开始析氧电位最低,在1.7 V左右,伏安电荷q~*=0.54 C/cm~2,腐蚀电位E_(corr)=-0.530 V(vs.SCE),腐蚀电流密度J_(corr)=6.90×10~(-4) A/cm~2。结论脉冲镀Pb-WC-PANI复合材料可以有效地降低析氧电位,其伏安电荷最大,并且反应阻抗较低,表面的电催化活性最好。同时,其腐蚀电位最高,腐蚀电流密度最低,耐腐蚀性能最好,在锌电积模拟溶液中具有良好的综合性能。
[Abstract]:Objective to prepare Ti / Pb-WC-PANI composite with good electrocatalytic activity and corrosion resistance, which can be used as electrode material in zinc electrodeposition process to reduce energy consumption. Methods Pb-WC-PANI was deposited on Ti substrate by pulse electrodeposition with pure lead as bottom layer. The electrocatalytic activity of Pb-WC-PANI composite coating, DC Pb-WC-PANI composite coating, Pb-WC-PANI composite coating, Pb-W@@ The corrosion performance of Taffel curve was studied. Results the lead substrate was prepared under the conditions of current density of 2 A / dm-2, forward conduction time of 0.3 Ms, period of 1.5 Ms, working time of 200 Ms and magnetic stirring at 25 鈩，

本文编号：2087408