A method for preparing a clean and efficient bimetallic single-atom catalyst

CN116440902BActive Publication Date: 2024-12-13NORTHEAST NORMAL UNIVERSITY
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Patent Information

Application Number
CN202310349309.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-04
Publication Date
2024-12-13
Estimated Expiration
2043-04-04

AI Technical Summary

Technical Problem

The existing preparation process of bimetallic single-atom catalysts has high energy consumption, low yield, strict synthesis conditions and difficulty in achieving efficient capture of single-atom metals, which limits its application in the industrial field.

Method used

The continuous flow liquid-phase plasma technology is used to treat cerium oxide and metal precursors through plasma discharge to generate oxygen vacancies to improve the bonding strength between metal atoms and the support surface, and achieve efficient anchoring and automatic synthesis of metal single atoms.

Benefits of technology

It realizes efficient and low-cost bimetal single-atom catalyst preparation, with productivity increased to 216g/d and the utilization rate of metal precursors reaching 98%, avoiding the waste of precious metal resources and is suitable for large-scale preparation and commercial applications.

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Abstract

The present invention is applicable to the field of inorganic nanomaterial technology, and provides a clean and efficient preparation method of bimetallic single-atom catalysts (DACs), comprising the following steps: using cerium oxide and a metal precursor aqueous solution as raw materials, passing the raw materials into a tungsten tube electrode, using another tungsten tube electrode as a counter electrode to pass high-purity nitrogen, plasma discharge treatment of the raw materials, centrifugal collection of precipitation and washing and drying. The continuous flow liquid phase plasma technology (f-LPP) provided by the present invention effectively constructs oxygen vacancies on the surface of the carrier, enhances the interaction between the single-atom metal and the carrier, solves the problem of single-atom aggregation, and the high-energy electrons and active free radicals generated by f-LPP reduce metal single atoms without adding a reducing agent or reducing gas, which is simple and green. The f-LPP technology improves the productivity of DACs and is easy to achieve large-scale production in parallel.
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