一种双金属氮化物催化剂及其制备方法与应用

By preparing bimetallic nitride catalysts, the problems of uneven dispersion and agglomeration of metal active sites in zinc-air battery cathode catalysts have been solved, achieving efficient oxygen reduction reaction and long-term stability, making them suitable for portable power supplies, stationary energy storage, and special power supplies.

CN122006781BActive Publication Date: 2026-07-17ANHUI SCI & TECH UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI SCI & TECH UNIV
Filing Date
2026-04-14
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing oxygen reduction reaction catalysts for zinc-air battery cathodes suffer from problems such as difficulty in uniformly dispersing metal active sites, leading to particle agglomeration and dissolution. This results in insufficient oxygen reduction reaction activity and cycle stability of the catalyst, making it difficult to meet the requirements of practical applications.

Method used

The preparation method of bimetallic nitride catalyst involves stirring iron nitrate, soluble starch, zinc nitrate, and dicyandiamide with cobalt nitrate in water to form a hydrogel. After freeze-drying, the hydrogel is treated at 850-950℃ in an ammonia atmosphere to form a hierarchical porous carbon framework. This achieves uniform dispersion and stable binding of iron-cobalt bimetallic active sites, avoiding metal particle agglomeration and dissolution.

Benefits of technology

It significantly improves the activity and cycle stability of the oxygen reduction reaction, with an oxygen reduction reaction half-wave potential of 0.925V, a limiting current density of up to 6.8mA·cm-2, a peak power density of 125mW·cm-2, and a stable cycle time of 1419 hours. It is suitable for applications in portable power supplies, stationary energy storage, and special power supplies.

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Abstract

本发明提供一种双金属氮化物催化剂及其制备方法与应用，涉及催化剂技术领域，其中，所述制备方法包括：将硝酸铁和可溶性淀粉加入水中，搅拌至糊化，得到糊化液；向所述糊化液中加入硝酸锌、双氰胺和硝酸钴，搅拌均匀，得到水凝胶；将所述水凝胶冷冻干燥，得到气凝胶；将所述气凝胶置于氨气氛围中，在850‑950℃的温度下保温2‑6H，得到含铁钴氮化物的双金属氮化物催化剂，该双金属氮化物催化剂氧还原反应活性和循环稳定性高。
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Citation Information

Patent Citations

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