Iron-ruthenium solid solution catalyst, method of preparation and use thereof in ammonia decomposition

By rapidly synthesizing nanoparticles using NaBH4 at room temperature and calcining them at high temperature, the preparation challenge of iron-ruthenium solid solution catalysts was solved. This method achieved atomic-level uniform distribution of Fe and Ru and a dual-atom-site structure, improving ammonia decomposition efficiency and making it suitable for industrial applications.

CN122352255APending Publication Date: 2026-07-10XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Filing Date
2026-04-15
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing methods for preparing iron-ruthenium solid solution catalysts are difficult to achieve atomically uniform alloying. The processes are complex and contain residual impurities and are prone to component segregation, resulting in low ammonia decomposition efficiency.

Method used

Using NaBH4 as a reducing agent, iron-ruthenium solid solution catalysts were rapidly synthesized at room temperature. Simultaneous co-reduction of Fe and Ru was achieved by controlling the reduction time of the metal precursor. The nanoparticles were then calcined at 200-800℃ to prepare FexRu1-x and FexRu1-x/Al2O3 catalysts.

Benefits of technology

Atomic-level uniform distribution of Fe and Ru was achieved, forming a dual-atom-site structure, which significantly reduced the conversion temperature of ammonia decomposition by 50%, improved the catalytic performance of ammonia decomposition and the H2 generation rate, and is suitable for industrial applications.

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Abstract

This invention discloses an iron-ruthenium solid solution catalyst, its preparation method, and its application in ammonia decomposition. It primarily addresses the technical problems of existing iron-ruthenium solid solution catalyst preparation methods, such as difficulty in achieving atomically uniform alloying, process complexity, residual impurities, and easy component segregation. The preparation method includes: weighing iron and ruthenium precursors according to the target catalyst's metal atomic ratio, dissolving them in a polar solvent, and then sonicating for 5-30 minutes to obtain a precursor solution; preparing a reducing agent and rapidly adding it to the precursor solution, stirring and reacting at room temperature for 5-30 minutes to obtain an intermediate product; the molar amount of the reducing agent is 2-100 times the total molar amount of iron in the iron precursor and ruthenium in the ruthenium precursor; centrifuging, washing, and vacuum drying the intermediate product to obtain nanoparticles; placing the nanoparticles in an H2 atmosphere and calcining them at 200-800°C for 10 minutes to 2 hours to obtain the iron-ruthenium solid solution catalyst.
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