Preparation method and application of cerium-cobalt composite oxide electrocatalyst

By preparing cerium-cobalt composite oxide electrocatalyst, the problem of high overpotential in electrocatalytic oxidation of glycerol is solved, low voltage and high efficiency catalysis are achieved, with high selectivity and good cycling performance, and cost is reduced.

CN119640320AActive Publication Date: 2025-03-18INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202510124407.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-26
Publication Date
2025-03-18
Estimated Expiration
2045-01-26

AI Technical Summary

Technical Problem

The prior art requires high overpotentials in electrocatalytic oxidation of glycerol, resulting in large electricity consumption, and high cost of precious metal catalysts and are prone to toxicity and inactivation.

Method used

Using the preparation method of cerium-cobalt composite oxide electrocatalyst, a cerium-cobalt composite oxide electrocatalyst is prepared by stirring soluble cerium salt, soluble cobalt salt and urea in water to form a mixed liquid, and react with a carbon fiber substrate at high temperature, and then drying and calcining.

Benefits of technology

During the glycerol oxidation process, the catalyst only needs a voltage of 1.38V to achieve a starting current density of 10mA·cm-2, which reduces the overpotential, has high selectivity and Faraday efficiency, and has good cycling performance and low cost.

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Abstract

The invention relates to a preparation method of a cerium-cobalt composite oxide electrocatalyst, which comprises the following steps: soluble cerium salt, soluble cobalt salt and urea are added into water and stirred to form a mixed solution, the cerium ion concentration is 4-95 mmol / L, the cobalt ion concentration is 40-60 mmol / L, and the molar ratio of the total metal amount of the soluble cobalt salt and the soluble cerium salt to the urea is (0.01-0.5): 1; adding the mixed solution and a carbon fiber substrate into a closed container, keeping at 100-160 DEG C for 2-24 hours, and cooling to room temperature to obtain a carbon fiber substrate loaded with a catalyst precursor; the carbon fiber substrate loaded with the catalyst precursor is dried and calcined, the calcination temperature is 300-500 DEG C, the calcination time is 1-4 h, the heating rate is 1-5 DEG C / min, and the cerium-cobalt composite oxide electrocatalyst is obtained. The synthesis method is simple, low in cost and suitable for large-scale production.
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