Monatomic copper/boron double-site multifunctional catalyst as well as preparation method and application thereof

A dual-site, multi-functional technology, applied in physical/chemical process catalysts, chemical instruments and methods, compounds of Group 4/14 elements of the periodic table, etc., can solve the problem that the preparation method of copper-based single-atom catalyst cannot be large Production, limited development of copper-based double-site catalysts, poor controllability of electrode area, etc., to achieve the effects of easy scale-up experiments, low cost, and fast reaction speed

Pending Publication Date: 2022-03-18
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, copper single atoms were deposited on the surface of nitrogen-sulfur co-doped graphene by electrochemical deposition, but limited by the size of the electrode area and poor controllability, this method is difficult to mass-produce
Similarly, copper single atoms are prepared by thermally evaporating foamed copper with ammonia gas, which is expensive and difficult to produce on a large scale.
[0004] In the prior art, the research around copper-based single-atom site catalysts mainly focuses on the preparation of a single copper site, and the development of copper-based double-site catalysts is still very limited; the preparation method of copper-based single-atom catalysts cannot be mass-produced

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Monatomic copper/boron double-site multifunctional catalyst as well as preparation method and application thereof
  • Monatomic copper/boron double-site multifunctional catalyst as well as preparation method and application thereof
  • Monatomic copper/boron double-site multifunctional catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of single-atom copper / boron dual-site multifunctional catalyst, comprising the following steps:

[0049] A. Precursor preparation: add 0.1 g of copper chloride dihydrate, 2 g of melamine, 2 g of silicon dioxide, 0.4 g of potassium borate and 2 g of chitosan into a beaker containing 80 ml of deionized water, and heat the above mixture After stirring, 0.5 g of glacial acetic acid was added dropwise, and finally kept at 80 °C for continuous evaporation. After half of the water evaporated, it was cooled to room temperature and then placed in the cold well of a freeze dryer for 5 hours at -35 °C, and then vacuum freeze-dried. 12 hours, the precursor powder is prepared;

[0050] B. Pyrolysis: take 3 grams of the precursor powder prepared in step A, put it into a corundum porcelain boat with a lid, put it into a tube furnace, and heat it up to 550°C at 2°C / min in a nitrogen atmosphere, and keep the temperature for 3 hours. ; Then carry out secondary pyrol...

Embodiment 2

[0060] A preparation method of single-atom copper / boron dual-site multifunctional catalyst, comprising the following steps:

[0061] A. Precursor preparation: Add 0.15 g of copper sulfate pentahydrate, 0.5 g of melamine, 1.5 g of dicyanamide, 3 g of silicon dioxide, 0.4 g of potassium borate, and 2 g of chitosan into a beaker containing 80 ml of deionized water , after heating and stirring the above mixture, add 0.8 g of formic acid dropwise, and finally keep it at 80 °C and continue to evaporate. After half of the water has evaporated, cool it to room temperature and put it in the cold well of a freeze dryer and freeze it at -55 °C for 2 hours, then Carry out vacuum freeze-drying for 10 hours to obtain the precursor powder;

[0062] B. Pyrolysis: take 2 grams of the precursor powder prepared in step A, put it into a corundum porcelain boat with a cover, put it into a tube furnace, heat it up to 550°C at 2°C / min in a nitrogen atmosphere, and keep the temperature for 4 hours. ...

Embodiment 3

[0066] A preparation method of single-atom copper / boron dual-site multifunctional catalyst, comprising the following steps:

[0067] A. Precursor preparation: add 0.12 g of copper acetate monohydrate, 2 g of urea, 2 g of silicon dioxide, 0.25 g of ammonium borate, and 2 g of chitosan into a beaker containing 80 ml of deionized water, and the above mixture is heated and stirred After that, 0.6 g of lactic acid was added dropwise, and finally kept at 80 °C for continuous evaporation. After half of the water evaporated, it was cooled to room temperature and then placed in the cold well of a freeze dryer for 3 hours at -50 °C, and then vacuum freeze-dried for 12 hours. , that is, the precursor powder is obtained;

[0068] B. Pyrolysis: take 3 grams of the precursor powder prepared in step A, put it into a corundum porcelain boat with a lid, put it into a tube furnace, and heat it up to 550°C at 2°C / min in an argon atmosphere, and keep the temperature for 2 Hour; then carry out se...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

According to the monatomic copper/boron double-site multifunctional catalyst and the preparation method and application thereof, copper salt serves as a metal source, a cyanamide compound serves as a nitrogen source, organic acid serves as a dissolving agent of chitosan, soluble boron salt serves as a boron source, chitosan serves as a carbon source, silicon dioxide and frozen ice serve as double templates, a pyrolysis-etching-activation strategy is adopted, and the monatomic copper/boron double-site multifunctional catalyst is prepared. And the copper/boron double-site catalyst material with the hierarchical porous structure is successfully prepared. The catalyst has a hierarchical porous structure, provides abundant mass transfer channels for catalytic reaction, and further realizes efficient catalytic performance. In addition, the catalyst can also be used for reducing carbon dioxide to prepare synthesis gas. Compared with the prior art, the method for preparing the monatomic copper/boron double-site multifunctional catalyst material is simple, reliable, low in production cost, short in process, low in equipment requirement, easy to amplify experiments and capable of achieving industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of catalysts and relates to the preparation and application of a single-atom site catalyst, in particular to a single-atom copper / boron double site multifunctional catalyst, a preparation method and an application. Background technique [0002] Single-atom site catalysts have attracted extensive attention and have positive application value in many fields. The current work mainly focuses on the construction of single metal atomic sites, because of the performance limitations of restricted single metal sites, the development of efficient methods to prepare catalysts with binary or multi-component sites has attracted great interest. Studies have shown that diatomic site catalysts have significantly better performance than single metal single-atom site catalysts. The problems of the currently developed single-atom site catalysts, such as low loading capacity and incapability of large-scale production, limit their furthe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/28B01J35/10C07F7/18C25B1/23C25B11/091
CPCB01J27/28B01J35/0033B01J35/1061C07F7/188C25B1/23C25B11/091Y02P20/584
Inventor 吴孔林方兆斌魏先文石罗祥詹林潇王震东尚恒帅叶明富
Owner ANHUI UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap