Nickel-iron layered double hydroxide with flaky nanoflower morphology and its preparation method and application

By aging a mixed solution of nickel acetate and ferrous salt at room temperature, NiFe-LDH with a flaky nanoflower morphology was prepared, which solved the problems of complex preparation process and insufficient catalytic performance of NiFe-LDHs and achieved efficient and low-cost electrocatalytic applications.

CN120440986BActive Publication Date: 2025-09-09SUZHOU UNIV
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Patent Information

Application Number
CN202510954179.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-11
Publication Date
2025-09-09
Estimated Expiration
2045-07-11

AI Technical Summary

Technical Problem

The existing NiFe-LDHs preparation technology has problems such as complex process, uneven product morphology, high equipment requirements and poor catalytic performance.

Method used

NiFe-LDH with a flaky nanoflower morphology was prepared by dissolving nickel acetate and a water-soluble ferrous salt in the presence of an organic solvent and water and then allowing the mixture to age. This method avoids the need to add an additional precipitant to adjust the pH value and is carried out at room temperature, simplifying the preparation process and improving the uniformity and catalytic performance of the product.

Benefits of technology

The low-cost, simple and efficient preparation of NiFe-LDH was achieved. The product has uniform morphology, higher specific surface area and active sites, and exhibits excellent electrocatalytic performance, especially in the oxygen evolution reaction after water electrolysis, where the overpotential is significantly reduced.

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Abstract

The present invention relates to a nickel-iron layered double hydroxide having a flaky nanoflower morphology and its preparation method and application. The preparation method of the nickel-iron layered double hydroxide comprises the following steps: S1, dissolving nickel acetate in an organic solvent or a mixed solvent of an organic solvent and water to prepare a first solution; dissolving a ferrous salt in water to prepare a second solution; S2, mixing the first solution and the second solution to obtain a mixed solution, and obtaining the nickel-iron layered double hydroxide through standing and aging. The method is simple to operate, has mild reaction conditions, low equipment cost, and a green synthesis process; and the NiFe-LDH prepared by the above method presents a three-dimensional nanoflower structure with uniform morphology and high specific surface area, which can provide more active sites. It exhibits excellent electrocatalytic performance as a catalyst for electrolysis of water and oxygen evolution, and has broad application prospects in the fields of electrochemical energy storage, electrocatalysis, and catalytic oxidation.
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