Mof-derived nitrogen cobalt hetero-nanoscale box electrocatalyst, preparation method and application

By partially substituting ZIF-67, a nitrogen-rich cobalt heterogeneous nanocrystal electrocatalyst was prepared, which solved the problem of poor stability of noble metal catalysts and achieved low-cost and high-efficiency electrocatalytic water splitting to produce hydrogen.

CN116641094BActive Publication Date: 2026-08-18ANHUI UNIV OF SCI & TECH
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Patent Information

Application Number
CN202310549459.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-16
Publication Date
2026-08-18
Estimated Expiration
2043-05-16

AI Technical Summary

Technical Problem

Traditional precious metal electrocatalysts for hydrogen evolution reaction have limited catalytic activity, poor stability, complex preparation processes, high energy consumption, and are prone to poisoning of precious metals, resulting in low utilization efficiency of metal sites.

Method used

By partially substituting the imidazole zeolite framework ZIF-67 and using the high-energy nitrogen-containing ligand 1H-1,2,3-triazole, a nitrogen-rich cobalt heterogeneous nanobox electrocatalyst was prepared, providing abundant Co/CoN heterogeneous catalytic centers and a porous structure, thus optimizing the electrocatalytic hydrogen evolution reaction.

Benefits of technology

The prepared catalyst exhibits a low hydrogen evolution overpotential under alkaline conditions, good stability, and excellent electrocatalytic water splitting performance for hydrogen production. The process is simple and easy to operate, making it suitable for industrial production.

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Abstract

The application discloses an MOF-derived nitrogen cobalt hetero-nano box electrocatalyst, a preparation method and application, and the method steps for preparing the catalyst are as follows: S1: preparation of a ZIF-67 template; S2: dissolving the ZIF-67 template in S1 in anhydrous methanol, ultrasonic stirring and dissolving, and recording as solution A; S3: dissolving 1H-1,2,3-triazole in an anhydrous methanol solution and recording as solution B; S4: adding the solution B in S3 into the solution A in S2, stirring, and then standing to perform a substitution reaction; and S5: centrifuging, drying and carbonizing the product after the reaction in S4 under nitrogen protection to obtain the MOF-derived nitrogen cobalt hetero-nano box electrocatalyst. The 2-methyl imidazole in the imidazole zeolite framework ZIF-67 is partially substituted by a high-energy nitrogen-containing ligand 1H-1,2,3-triazole ligand, a rich nitrogen source is provided, and the coordination environment of cobalt atoms is locally constrained, so that the prepared electrocatalyst has a lower hydrogen evolution overpotential under the alkaline condition of 1 mol / L KOH aqueous solution.
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