A method for preparing an Au-supported MOF (Zr) catalyst, and products and uses thereof
By preparing Au-supported MOF(Zr) catalysts and combining Au nanoparticles with MOF(Zr), and using different reducing agents to form highly efficient catalysts, the problem of low electrochemical ammonia synthesis rate was solved, and a significant improvement in ammonia generation rate was achieved.
CN115386915BActive Publication Date: 2025-12-19CHANGZHOU UNIV
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Patent Information
- Application Number
- CN202211053868.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2042-08-31
AI Technical Summary
Technical Problem
At present, the ammonia generation rate and yield of electrochemical ammonia synthesis are low, making it difficult to achieve industrial-scale production.
Method used
Au-supported MOF(Zr) catalysts were prepared by combining MOF(Zr) with Au nanoparticles and reducing them with different reducing agents such as NaBH4, N2H4, sodium citrate and ascorbic acid to form catalysts with high catalytic activity.
Benefits of technology
The performance of electrocatalytic ammonia synthesis was improved, increasing the ammonia generation rate from 7.43 μg mg⁻¹ h⁻¹ to 26.17 μg mg⁻¹ h⁻¹, thus achieving efficient utilization of the catalyst and optimization of catalytic activity.
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Abstract
The application discloses a preparation method and product of an Au-loaded MOF(Zr) catalyst and application thereof, and belongs to the field of catalysts. The preparation method comprises the following steps: preparing a carrier MOF(Zr); dispersing the MOF(Zr) in a mixed solution of ethanol and deionized water, and then carrying out ultrasonic treatment; after the ultrasonic treatment, the mixed solution is placed in an ice water bath, and a HAuCl4 solution is added in the process of stirring; after sufficient stirring, a reducing agent is added, and stirring is carried out for 3-5 hours; after the reaction is completed, the precipitate is washed with deionized water for three times, and then dried, so as to obtain the MOF(Zr) catalyst loaded with Au nanoparticles. The Au nanoparticles can be efficiently utilized, and the special structure (multi-channel structure, large specific surface area, uniformly distributed active sites and the like) of the metal organic framework is favorable for the adhesion of the Au nanoparticles. The catalyst Au prepared by using NaBH4 has relatively high activity, and the catalyst prepared by using NaBH4 has the best catalytic activity.
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