A mo-doped nickel-cobalt layered double hydroxide catalyst, a preparation method and application thereof

By growing Mo-doped NiCo-LDH catalyst in situ on nickel foam, the preparation process is simplified, the urea oxidation pathway is optimized, and efficient and selective NO2- generation is achieved. This solves the problems of complex catalyst preparation and selective control in existing technologies and has good prospects for industrial application.

CN122128753APending Publication Date: 2026-06-02FUZHOU UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUZHOU UNIV
Filing Date
2026-04-15
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In the current electrocatalytic urea oxidation reaction, the catalyst preparation process is complex, making it difficult to achieve high selectivity control over the intermediate products of urea oxidation, and thus failing to efficiently convert urea into the high-value-added chemical NO2-.

Method used

A Mo-doped NiCo-LDH catalyst was grown in situ on nickel foam using a one-step hydrothermal method. By modulating the electronic structure of NiCo-LDH through Mo doping, the continuous oxidation pathway of the key intermediate in the oxidation of urea to nitrite (NO2-) was optimized, simplifying the preparation process.

Benefits of technology

High selectivity and high yield of NO2- were achieved within a wide potential window. The catalyst exhibits good stability and resistance to carbonate poisoning, with a maximum Faraday efficiency of 93.4%, which is significantly better than that of the undoped catalyst.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122128753A_ABST
    Figure CN122128753A_ABST
Patent Text Reader

Abstract

This invention discloses a Mo-doped nickel-cobalt layered hydroxide catalyst, its preparation method, and its application in the electrocatalytic urea oxidation reaction (UOR). The catalyst uses nickel foam as a substrate, and nickel-cobalt-molybdenum layered hydroxide (NiCoMo-LDH) is grown in situ on the nickel foam via a hydrothermal method. By introducing highly electronegative, multi-valence Mo, the electronic structure of the NiCo-LDH catalyst is modulated, stabilizing the high-valence active phase during UOR and optimizing NO2 production in UOR. ‑ The continuous oxidation pathway of the key intermediate *NH2 significantly increases NO2 ‑ The selectivity and yield of the NiCoMo-LDH catalyst are discussed. The preparation method of this invention is simple, and the catalyst exhibits excellent resistance to carbonate poisoning, good long-term stability, and high NO2 content. ‑ Selectivity makes it suitable for the purification of urea-containing wastewater and the green synthesis of high-value-added nitrogen-containing products.
Need to check novelty before this filing date? Find Prior Art