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Citation: XU Shuang-Quan, LIU Chun-Xia, SHEN Qing-Feng, ZHANG Tao, NI Yuan, YU Xiao-Hua. Electrodeposition Mechanism of Zn (Ⅱ) on Zinc Electrode[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(3): 386-392. doi: 10.11862/CJIC.2016.061 shu

Electrodeposition Mechanism of Zn (Ⅱ) on Zinc Electrode

  • 1.

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China

  • 2.

    Analysis and Test Center, Kunming University of Science and Technology, Kunming 650093, China

  • Received Date: 14 October 2015
    Revised Date: 19 January 2016

Figures(7)

  • Reaction method of Zn2+ on the zinc electrode was researched by cyclic voltammetry (CV). Nucleation mode with Zn2+ was studied by chronoammperometry (CA) and impedance′s behavior of the Zn2+ in the different overpotential deposition periods was investigated by electrochemical impedance spectroscopy (EIS) in Zn (Ⅱ)-NH4Cl quasi neutral system. The results showed that the electrodeposition of Zn2+ is an irreversible electrode reactions and conducts by continuous two steps of single electron in which the first step is controlled by speed. The electron transfer coefficient of electrode reaction is related to the surface of zinc electrode structure. Under the condition of constant potential, the crystallization of Zn2+ is approximate to three-dimensional instantaneous nucleation on zinc electrode in this system. Depositing of Zn2+ has experienced the process of covering, adsorption film and the formation of large number of nucleation. The process was controlled by electrochemical polarization firstly and then the electrochemical polarization-concentration polarization mixed control with the control potential negatively shifted. Finally the mechanism of electrodeposition process with Zn2+ on the zinc electrode was given.
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