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Related Experiment Video

Updated: May 13, 2026

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Published on: October 5, 2017

An oxygen pumping anode for electrowinning aluminium.

Changqing Liu¹, Xiaobo Ji, Pingmin Zhang

¹Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.

Physical Chemistry Chemical Physics : PCCP

|March 23, 2013

Summary

A new oxygen pumping anode was developed for aluminum electrowinning, achieving thermodynamic stability by controlling oxygen ion chemical potential. This innovation holds promise for electrochemical metallurgy of other metals, including titanium dioxide reduction.

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Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

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Area of Science:

Electrochemistry
Materials Science
Metallurgy

Background:

Electrowinning aluminum requires stable anodes for efficient metal production.
Controlling oxygen ion chemical potential is crucial for anode stability in electrochemical processes.

Purpose of the Study:

To design and investigate a novel oxygen pumping anode for aluminum electrowinning.
To achieve thermodynamic stability at the anode by manipulating oxygen ion chemical potential.
To explore the potential application of this anode in electrochemical metallurgy of other metals.

Main Methods:

Development of a novel oxygen pumping anode.
Manipulation of oxygen ion chemical potential using electromotive forces.
Testing anode performance in aluminum electrowinning.

Main Results:

The novel anode demonstrated thermodynamic stability through controlled oxygen ion chemical potential.
Electromotive forces were effectively used to manipulate the chemical potential.

Conclusions:

The developed oxygen pumping anode is thermodynamically stable for aluminum electrowinning.
This anode design has potential applications in the electrochemical metallurgy of other metals, such as direct electrochemical reduction of TiO2 in the FFC process.