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Updated: Apr 15, 2026

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
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Defect-Engineered La-Mn Co-Doped β-PbO2 Anodes for Energy-Efficient Zinc Electrowinning.

Yi Luo1,2, Nan Li1,2, Lingjing Yang1,2

  • 1State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China.

Materials (Basel, Switzerland)
|April 14, 2026
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Summary

Developing a La-Mn co-doped lead dioxide anode significantly reduces energy consumption in zinc production by enhancing the oxygen evolution reaction (OER). This innovative anode offers substantial energy savings per ton of zinc.

Keywords:
LaMn co-dopingPbO2 anodeinterfacial kineticszinc electrowinning

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Chemical Engineering

Background:

  • High energy consumption in zinc production is linked to inefficient lead anodes and slow oxygen evolution reaction (OER).
  • Developing advanced anode materials is crucial for improving energy efficiency in electrochemical processes.

Purpose of the Study:

  • To engineer a novel La-Mn co-doped β-PbO2 anode to enhance the oxygen evolution reaction (OER) kinetics.
  • To reduce the high energy consumption associated with lead anodes in industrial zinc production.

Main Methods:

  • Fabrication of La-Mn co-doped β-PbO2 anodes via electrodeposition.
  • Characterization using X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS).
  • Electrochemical performance evaluation using Electrochemical Impedance Spectroscopy (EIS) and polarization measurements.

Main Results:

  • La doping induced lattice shrinkage and altered electron structure, facilitating Mn4+ to Mn3+ conversion and increasing surface active oxygen sites.
  • Electrochemical Impedance Spectroscopy (EIS) revealed a 4.2-fold decrease in charge transfer resistance (Rct) and a significant increase in electrochemically active surface area (ECSA).
  • The La-Mn-β-PbO2 anode exhibited a low overpotential (840 mV) and Tafel slope (265 mV dec-1) at industrial current density (50 mA cm-2).

Conclusions:

  • The La-Mn co-doped β-PbO2 anode demonstrates significantly improved catalytic activity for OER, reducing energy consumption by 187.10 kWh/ton of zinc.
  • This developed anode represents a promising, energy-saving alternative for industrial zinc production, addressing limitations of traditional lead anodes.