| YANG Ya-nan,CAO Mei,GUO Zhong-cheng,WANG Mei-mei.Electrochemical Performance of Different Ti-based Composite Electrode Materials[J],46(8):43-48 |
| Electrochemical Performance of Different Ti-based Composite Electrode Materials |
| Received:February 12, 2017 Revised:August 20, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.08.007 |
| KeyWord:composite pulse electrodeposition steady-state polarization curve cyclic voltammetry curve AC impedance curve Tafel curve |
| Author | Institution |
| YANG Ya-nan |
a.School of Material Science and Engineering, Kunming University of Science and Technology, Kunming , China |
| CAO Mei |
b.School of Science, Kunming University of Science and Technology, Kunming , China |
| GUO Zhong-cheng |
c.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming , China |
| WANG Mei-mei |
c.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming , China |
|
| Hits: |
| Download times: |
| Abstract: |
| 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. |
| Close |
|
|
|