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Electrochemical Behavior of Nano-Carbon Materials Enhanced Pb Anodes for Zinc Electrowinning
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Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology

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    Abstract:

    The electrowinning process plays a substantial role in zinc hydrometallurgy, and its oxygen evolving potential on anode is critical for energy saving and high-quality metallic zinc. Based on the electro-catalysis of carbon nano-materials for oxygen evolving reaction (OER), 6 typical 0-dimensional, 1-dimensional, and 2-dimensional carbon nanomaterials were used as the catalytic enhanced phase to prepare lead-based composite anodes. The electrochemical behavior of the composite anode was studied by cyclic voltammetry, anodic polarization, EIS and corrosion resistant test under zinc electrowinning conditions. Nano-carbon materials enhanced Pb composite anodes show excellent electrocatalysis for OER and their stable overpotetntial are lower than pure Pb anode by more than 96mV under current density of 500A/m2. The electrochemical catalytic performance of 2-dimensional carbon materials is not as well as that of 0-dimensional carbon materials, and the 1-dimensional ones have the best performance among them. After modified with functional groups or decorated with functional particles on the surface of 1-dimensional carbon materials, the increase of electrochemical catalytic performance was significant.

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[Zhao Lv-xing, Yang Chang-jiang. Electrochemical Behavior of Nano-Carbon Materials Enhanced Pb Anodes for Zinc Electrowinning[J]. Rare Metal Materials and Engineering,2021,50(12):4476~4485.]
DOI:10.12442/j. issn.1002-185X.20200938

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History
  • Received:December 06,2020
  • Revised:January 25,2021
  • Adopted:March 08,2021
  • Online: January 09,2022
  • Published: December 24,2021