Monatomic catalyst prepared based on surface immobilizing method

A catalyst and atomic technology, applied in the field of preparation of metal single atom catalysts, to achieve the effects of high yield, cheap and easy-to-obtain raw materials, and excellent catalytic performance

Active Publication Date: 2020-04-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at many problems existing in current single-atom catalysts, the purpose of the present invention is to provide a preparation method of single-atom catalysts with simple synthesis process, low cost, and environmental protection

Method used

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  • Monatomic catalyst prepared based on surface immobilizing method
  • Monatomic catalyst prepared based on surface immobilizing method
  • Monatomic catalyst prepared based on surface immobilizing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of Fe single atom

[0033] Add 40 mg of 1,3,5 trimesic acid, 200 mg of cobalt nitrate hexahydrate and 20 mg of bipyridyl iron into 150 ml of DMSO solution and ultrasonicate for 30 min at room temperature to fully dissolve the organic ligands and metal salts. Stir well and transfer to the reaction kettle. Use an oven to heat the reaction at a constant temperature of 90° C. for 2 days. A porous organometallic framework structure loaded with bipyridyl iron was obtained. Subsequently, the solvent is removed by centrifugation, washing, and vacuum drying, and the precursor is pulverized into powder and placed in a porcelain boat. The sample was calcined and pyrolyzed in a tube furnace filled with inert gas. The heating rate is 2°C / min, and the temperature is controlled below 400°C for 2 hours. Through the above steps, a pink powder is finally obtained.

Embodiment 2

[0035] Preparation of Nickel Single Atoms

[0036] Add 40 mg of 1,3,5 trimesic acid, 200 mg of cobalt nitrate hexahydrate and 30 mg of 2-mercaptopyrimidine nickel to 150 ml of DMSO solution and ultrasonicate for 30 min at room temperature to fully dissolve the organic ligand and the metal salt. Stir well and transfer to the reaction kettle. Use an oven to heat the reaction at a constant temperature of 90° C. for 2 days. A porous organometallic framework structure loaded with bipyridyl iron was obtained. Subsequently, the solvent is removed by centrifugation, washing, and vacuum drying, and the precursor is pulverized into powder and placed in a porcelain boat. The sample was calcined and pyrolyzed in a tube furnace filled with inert gas. The heating rate is 2°C / min, and the temperature is controlled below 300°C for 2 hours. Through the above steps, a purple powder is finally obtained.

Embodiment 3

[0038] Preparation of Platinum Single Atoms

[0039]Add 40 mg of 1,3,5 trimesic acid, 200 mg of cobalt nitrate hexahydrate and 40 mg of porphyrin platinum to 150 ml of DMSO solution and sonicate for 30 min at room temperature to fully dissolve the organic ligand and the metal salt. Stir well and transfer to the reaction kettle. Use an oven to heat the reaction at a constant temperature of 90° C. for 2 days. A porous organometallic framework structure loaded with bipyridyl iron was obtained. Subsequently, the solvent is removed by centrifugation, washing, and vacuum drying, and the precursor is pulverized into powder and placed in a porcelain boat. The sample was calcined and pyrolyzed in a tube furnace filled with inert gas. The heating rate is 2°C / min, and the temperature is controlled below 300°C for 2 hours. Through the above steps, a purple powder is finally obtained.

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Abstract

The invention belongs to the field of material preparation and application thereof, and discloses a method for preparing a high-performance monatomic catalyst by immobilizing catalytic active sites onthe surface of an organic material. Compared with a traditional noble metal catalyst and reported unit point and monatomic catalysts, the monatomic catalyst prepared by the invention has the characteristics of excellent performance, controllable structure and concentration of active sites, mild preparation conditions, low cost, simple process, high yield and the like. The catalyst shows excellentperformance in electrocatalysis and thermocatalysis, and has a wide and excellent industrial application prospect.

Description

Technical field: [0001] The invention relates to the preparation and application of a metal single-atom catalyst, which belongs to the field of material and catalysis science. Background technique: [0002] In recent decades, with the global consumption of fossil fuels and the deterioration of the ecological environment. It is urgent to find new clean energy sources and to deal with environmental problems. Catalysis is an important starting point to solve this series of energy and environmental problems. It plays a pivotal role in processes such as chemical industrial production, energy storage and conversion, and waste treatment and degradation. Catalysts with excellent performance can not only shorten the production cycle and save production costs, but also greatly simplify the production process, reduce energy consumption and waste emissions. In traditional industrial catalytic processes, heterogeneous catalysts based on noble metals are widely used. However, due to va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/745B01J23/755B01J35/00B01J37/08C07C1/32C07C15/14C25B11/06
CPCB01J37/086B01J35/0046B01J35/0033B01J23/745B01J23/755B01J23/42C07C1/321C25B11/075C07C15/14
Inventor 陈殷侯乾坤黄宇昌
Owner CENT SOUTH UNIV
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