FEATURES OF ELECTROCHEMICAL SYNTHESIS OF MANGANESE DIOXIDE FROM SECONDARY RAW MATERIALS
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Chelybinsk State University
(Department of Analytical and Physical Chemistry, Assistant)
employee from 01.01.2022 to 01.01.2025
employee from 01.01.2022 to 01.01.2025
2.
Chelybinsk State University
3.
Chelybinsk State University
4.
Chelybinsk State University
Type:
Article
Pages:
from 105
to 108
Status:
Published
Received:
11.11.2025
Accepted:
27.01.2026
Published:
26.02.2026
Language:
Russian
Keywords:
ELECTROLYSIS, MANGANESE DIOXIDE, RAMAN SPECTROSCOPY, X-RAY DIFFRACTION, RECYCLING
Funding:
Rabota vypolnena pri podderzhke fonda perspektivnyh nauchnyh issledovaniy Chelyabinskogo gosudarstvennogo universiteta https://www.csu.ru/scientific-departments/researchsector/programmes-and-funds.aspx
Abstract:
This paper examines the electrochemical synthesis of manganese dioxide from an electrolyte obtained from metallurgical by-products via sulfuric acid leaching. Manganese dioxide is one of the most widely used compounds in the production of anode materials for primary and secondary power sources. However, high-quality manganese ores are often used for its production. Food production, where manganese concentrations can reach 25-30 wt.%, has received little attention, despite this being a promising approach that could allow some manganese to be recycled. This article focuses specifically on the electrolysis stage, rather than on electrolyte production from waste, as the production method is described elsewhere by the authors. It is demonstrated that the dioxide can be produced using a diaphragm electrolyzer with lead anodes at an anode current density of 250 A/m2. Raman spectroscopy and X-ray diffraction revealed that the resulting manganese dioxide exists in the form of α-MnO2 and β-MnO2 phases. The main side reaction in the electrochemical production of manganese dioxide is water oxidation, with the minimum current efficiency of manganese dioxide being 32.8%. It was also shown that, in parallel with the target process of dioxide production, cathodic precipitation of metallic manganese occurs on a stainless steel electrode, further enhancing the efficiency of electrolysis. However, the resulting metallic manganese undergoes rapid oxidation under atmospheric conditions, making it difficult to use in its pure form. However, it can be used in the production of ferroalloys and various alloy steels.
This paper examines the electrochemical synthesis of manganese dioxide from an electrolyte obtained from metallurgical by-products via sulfuric acid leaching. Manganese dioxide is one of the most widely used compounds in the production of anode materials for primary and secondary power sources. However, high-quality manganese ores are often used for its production. Food production, where manganese concentrations can reach 25-30 wt.%, has received little attention, despite this being a promising approach that could allow some manganese to be recycled. This article focuses specifically on the electrolysis stage, rather than on electrolyte production from waste, as the production method is described elsewhere by the authors. It is demonstrated that the dioxide can be produced using a diaphragm electrolyzer with lead anodes at an anode current density of 250 A/m2. Raman spectroscopy and X-ray diffraction revealed that the resulting manganese dioxide exists in the form of α-MnO2 and β-MnO2 phases. The main side reaction in the electrochemical production of manganese dioxide is water oxidation, with the minimum current efficiency of manganese dioxide being 32.8%. It was also shown that, in parallel with the target process of dioxide production, cathodic precipitation of metallic manganese occurs on a stainless steel electrode, further enhancing the efficiency of electrolysis. However, the resulting metallic manganese undergoes rapid oxidation under atmospheric conditions, making it difficult to use in its pure form. However, it can be used in the production of ferroalloys and various alloy steels.
Keywords:
ELECTROLYSIS, MANGANESE DIOXIDE, RAMAN SPECTROSCOPY, X-RAY DIFFRACTION, RECYCLING
ELECTROLYSIS, MANGANESE DIOXIDE, RAMAN SPECTROSCOPY, X-RAY DIFFRACTION, RECYCLING
