A carbon-coated iron oxide electrocatalyst for oxygen reduction, preparation method thereof and application thereof in electrocatalytic oxygen reduction for producing hydrogen peroxide

The carbon-coated iron tetroxide catalyst prepared by eutectic solvent solves the problems of high cost and low efficiency of existing electrocatalysts, and realizes efficient and stable hydrogen peroxide production, which is suitable for large-scale industrial applications.

CN116657179BActive Publication Date: 2026-05-26ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Filing Date
2023-04-19
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing electrocatalysts suffer from high cost, low efficiency, and difficulty in large-scale industrialization in the production of hydrogen peroxide. In particular, the activity and selectivity of the catalysts are difficult to meet the requirements of efficient production at the same time.

Method used

A carbon-coated iron oxide catalyst was prepared using a eutectic solvent. The microstructure of the catalyst was controlled by a two-step calcination process, resulting in a special structure in which iron oxide is embedded or completely coated by a carbon substrate, thereby improving the stability and activity of the catalyst.

Benefits of technology

A low-cost, high-efficiency electrocatalytic oxygen reduction process for hydrogen peroxide production has been achieved. The catalyst exhibits excellent long-term stability and high selectivity, making it suitable for large-scale industrial applications.

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Abstract

This invention discloses a method for preparing a carbon-coated iron tetroxide (Fe3O4) oxygen reduction catalyst: An organic compound and a metal salt are stirred and heated under sealed conditions, and then vacuum dried to obtain a eutectic solvent; the eutectic solvent is calcined at low temperature in an inert gas atmosphere, and the resulting solid is ground, washed, and dried to obtain an intermediate; the intermediate is then subjected to a second high-temperature calcination in an inert gas atmosphere to obtain the final product. The carbon-coated iron tetroxide catalyst prepared by this invention exhibits good activity and selectivity for the electrocatalytic oxygen reduction to hydrogen peroxide production, and also possesses excellent stability. This method has a simple preparation process, low equipment requirements, high controllability, and reduces production costs.
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