杨亚楠,曹梅,郭忠诚,王梅梅.不同Ti基复合电极材料的电化学性能研究[J].表面技术,2017,46(8):43-48
不同Ti基复合电极材料的电化学性能研究
Electrochemical Performance of Different Ti-based Composite Electrode Materials
投稿时间:2017-02-12  修订日期:2017-08-20
DOI:10.16490/j.cnki.issn.1001-3660.2017.08.007
中文关键词:  复合材料  脉冲电沉积  稳态极化曲线  循环伏安曲线  交流阻抗曲线  Tafel曲线
英文关键词:composite  pulse electrodeposition  steady-state polarization curve  cyclic voltammetry curve  AC impedance curve  Tafel curve
基金项目:昆明理工大学人才培养基金(KKSY201407084)
作者单位
杨亚楠 昆明理工大学 a.材料科学与工程学院,昆明 650093 
曹梅 昆明理工大学 b.理学院,昆明 650093 
郭忠诚 昆明理工大学 c.冶金与能源工程学院,昆明 650093 
王梅梅 昆明理工大学 c.冶金与能源工程学院,昆明 650093 
AuthorInstitution
YANG Ya-nan a.School of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 
CAO Mei b.School of Science, Kunming University of Science and Technology, Kunming 650093, China 
GUO Zhong-cheng c.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China 
WANG Mei-mei c.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China 
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中文摘要:
      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/dm2,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/dm2,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/cm2,腐蚀电位Ecorr=-0.530 V(vs. SCE),腐蚀电流密度Jcorr=6.90×10-4 A/cm2。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。
英文摘要:
      The work aims to reduce energy consumption by preparing Ti/Pb-WC-PANI composite of good electrocatalytic activity and corrosion resistance and using it as electrode material in zinc electrowinning process. The pulsed electrodeposition method was applied on Ti substrate, and pure lead was used as bond coat, and then tungsten carbide and polyaniline were plated. By comparing and analyzing steady polarization curve, cyclic voltammetric curve and electrochemical impedance spectroscopy of the pulsed Pb-WC-PANI composite coating, DC Pb-WC-PANI composite coating, lead-silver alloy and pure lead, electrocatalytic activity of oxygen evolution was studied, corrosion resistance was studied using Tafel curve. The lead base coat was prepared provided with current density of 2 A/dm2, forward conduction time of 0.3 ms, period of 1.5 ms, working time of 200 ms, magnetic stirring and plating time of 1.5 h at 25 ℃. Then the Pb-WC-PANI was plated provided with impulse average current density of 2 A/dm2, pulse width of 0.3-0.5 ms, pulse period of 1.5 ms, deposition time of 1 h at 25 ℃, and Ti/Pb-WC-PANI composite was obtained. It has the lowest oxygen-evolution potential threshold: 1.7 V, volt ampere charge: q*=0.54 C/cm2, corrosion potential Ecorr=-0.530 V (vs. SCE), corrosion current density: Jcorr=6.90×10-4 A/cm2. Pulsed Pb-WC-PANI composite can effectively reduce oxygen evolution potential, it features in the highest voltammetric charge, low reaction impedance and best surface electrocatalytic activity; in addition, it has the highest corrosion potential, the lowest corrosion current density and the best corrosion resistance, and it exhibits good comprehensive performance in the zinc electrodeposition simulated solution.
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