Process for the preparation of a transition metal carbonate catalyst based on a deep eutectic solvent, transition metal carbonate catalyst and use thereof

CN117361642BActive Publication Date: 2026-07-07CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Filing Date
2023-08-31
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing precious metal catalysts suffer from low reserves, high costs, and poor stability. Transition metal carbonates, on the other hand, have poor conductivity and low activity, which limits their industrial application in the oxygen evolution reaction of water electrolysis. Existing catalysts struggle to balance high catalytic activity and low cost.

Method used

Transition metal carbonate catalysts were prepared using eutectic solvents. A binary eutectic solvent was formed by urea and alcohol, and a transition metal salt was added to form a ternary eutectic solvent. After solvothermal reaction, the catalyst was washed and dried to prepare a catalyst with a two-dimensional nanosheet structure. The strong chelating effect of the eutectic solvent was used to achieve high dispersion and morphology control.

Benefits of technology

The prepared catalyst exhibits excellent electrocatalytic oxygen evolution performance, high activity, good stability, and low cost. It is suitable for water electrolysis for oxygen evolution and zinc-air batteries, achieving high atom utilization and safe and environmentally friendly catalyst production.

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Abstract

The application relates to the technical field of energy materials, in particular to a preparation method of a transition metal carbonate catalyst based on a eutectic solvent, the transition metal carbonate catalyst and application thereof, which comprises the following steps: S1, urea and alcohol are mixed according to a certain proportion, and then stirred to obtain a binary eutectic solvent; S2, a transition metal salt is added into the binary eutectic solvent prepared in the step S1, and then continuously stirred for a period of time to obtain a ternary eutectic solvent; S3, the ternary eutectic solvent obtained in the step S2 is reacted for a period of time, then washed by using deionized water, and vacuum dried to obtain a transition metal carbonate catalyst. The transition metal carbonate catalyst prepared by the application has a two-dimensional nanosheet structure, has excellent electrocatalytic oxygen evolution performance, is used for catalyzing water electrolysis and oxygen evolution reaction of a zinc air battery, has high activity, and has a low required overpotential when a current density is 10 mA / cm 2 2, and the catalyst prepared by the application has excellent stability.
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