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Applied Physics A

, 125:150 | Cite as

Effect of Ce(NO3)4 on the electrochemical properties of Ti/PbO2–TiO2–Ce(NO3)4 electrode for zinc electrowinning

  • Cheng Zhang
  • Jianhua LiuEmail author
  • Buming Chen
Article
  • 10 Downloads

Abstract

Ti/PbO2–TiO2–Ce(NO3)4 electrode for zinc electrowinning was prepared, and the effect of Ce(NO3)4 content on the electrochemical properties of zinc electrowinning anode was studied. Morphology and composition of the Ti/PbO2 electrode before and after polarization were analyzed by SEM and XRD. The corrosion mechanism was investigated by linear sweep voltammetry (LSV), cyclic voltammetry (CV) ,and electrochemical impedance spectroscopy (EIS) analyses. The cell voltage, current efficiency, corrosion rate, anode lifetime, and failure mechanism of Ti/PbO2 and Ti/PbO2–TiO2–Ce(NO3)4 were analyzed by simulating zinc electrowinning experiments. It was found that Ce(NO3)4 promoted the oxygen evolution reaction, and reduced the oxygen evolution potential and energy consumption. The analysis of oxygen evolution peak and reduction peak shows that Ti/PbO2–TiO2–Ce(NO3)4 electrode has good invertibility. In addition, it was found that the addition of Ce(NO3)4 increased the activity of the coating, and Ti/PbO2–TiO2–Ce(NO3)4 (0.5 g L−1) had the best activity. Compared with Ti/PbO2, the cell voltage of Ti/PbO2–TiO2–Ce(NO3)4 (0.5 g L−1) was reduced by 0.15 V, the current efficiency was improved by 4.3%, the corrosion rate was reduced by 0.0331 g A−1 h−1, and the lifetime was improved by 5 h.

Notes

Acknowledgements

This work was supported by the funds for the construction of high-level talents of Kunming University of Science and Technology (KKKP201763019) and the Kunming University of Science and Technology Analysis Test Fund (2017T20170001).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Complex Nonferrous Metal Resources Clean UtilizationKunming University of Science and TechnologyKunmingPeople’s Republic of China
  2. 2.Key Laboratory of Unconventional MetallurgyMinistry of Education,Kunming University of Science and TechnologyKunmingPeople’s Republic of China
  3. 3.Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunmingPeople’s Republic of China

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