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Preparation and applications of supported palladium catalyst using MOFs derived carbon-based material as carrier

A technology of supported palladium and carbon-based materials, applied in the direction of carbon compound catalysts, catalysts, physical/chemical process catalysts, etc., can solve the problems of easy deactivation and difficult separation of noble metal catalysts, and achieve good cycle stability and high specific surface area , easy-to-implement effects

Inactive Publication Date: 2017-06-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The Heck reaction is an important C-C coupling reaction. Traditional homogeneous Heck reaction noble metal catalysts have problems such as easy deactivation and difficult separation during the reaction process. Loading palladium on various supports to construct a recyclable heterogeneous Supported catalysts remain an important challenge

Method used

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  • Preparation and applications of supported palladium catalyst using MOFs derived carbon-based material as carrier
  • Preparation and applications of supported palladium catalyst using MOFs derived carbon-based material as carrier
  • Preparation and applications of supported palladium catalyst using MOFs derived carbon-based material as carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Weigh 0.064g of palladium chloride and 0.384g of polyvinylpyrrolidone and dissolve them in a mixture of 600mL of methanol and 20mL of deionized water, reflux at 70°C for 5h to obtain Pd nanoparticles.

[0023] Step 2: Weigh 6.600g of 2-methylimidazole, 5.000g of cobalt nitrate hexahydrate and 4.000g of polyvinylpyrrolidone and dissolve them in 350mL of methanol solution, and add 150mL of the Pd nanoparticle solution prepared in step 1 into the above mixture , magnetically stirred for 2 hours, then left at room temperature for 24 hours, then centrifuged with methanol, activated, and vacuum-dried at 60°C for 8 hours to obtain Pd@ZIF-67.

[0024] Step 3: Weigh 0.200 g of Pd@ZIF-67 prepared in Step 2, place it in a mortar and grind for 10 min, and under nitrogen protection, heat up to 800 °C for 3 h at a heating rate of 2 °C / min to prepare a nitrogen-doped The supported palladium metal nanoporous composite material (Pd@Co / CNT) wrapped by heterogeneous carbon nanotub...

Embodiment 2

[0026] Step 1: Weigh 0.064g of palladium chloride and 0.384g of polyvinylpyrrolidone and dissolve them in a mixture of 600mL of methanol and 20mL of deionized water, reflux at 70°C for 5h to obtain Pd nanoparticles.

[0027] Step 2: Weigh 6.600g of 2-methylimidazole, 5.000g of cobalt nitrate hexahydrate and 4.000g of polyvinylpyrrolidone and dissolve them in 250mL of methanol solution, and add 250mL of the Pd nanoparticle solution prepared in step 1 to the above mixture , magnetically stirred for 2 hours, then left at room temperature for 24 hours, then centrifuged with methanol, activated, and vacuum-dried at 60°C for 8 hours to obtain Pd@ZIF-67.

[0028] Step 3: Weigh 0.200 g of Pd@ZIF-67 prepared in Step 2, place it in a mortar and grind it for 10 min, and under the condition of nitrogen protection, heat up to 900 °C for 2 h at a heating rate of 2 °C / min to prepare a nitrogen-doped The supported palladium metal nanoporous composite material (Pd@Co / CNT) wrapped by heterogene...

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PUM

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Abstract

The invention discloses preparation and applications of a supported palladium catalyst using a MOFs derived carbon-based material as a carrier, and belongs to the technical field of catalyst material preparation. According to the present invention, ZIF-67 is adopted as a template, reduced palladium nanoparticles are uniformly supported in the pore channels in the ZIF-67 during a ZIF-67 synthesis process, and under a nitrogen protection condition, the carbon-based nanometer material supported palladium catalyst having excellent catalysis performance is constructed through high temperature carbonation; the preparation method of the invention is simple and easy to perform; and the prepared catalyst maintains the high specific surface area and the abundant pore structure characteristics of the precursor ZIF-67 to a large extent, such that the uniform dispersion and the stabilization of the palladium nanoparticles are easily achieved, and the excellent catalytic activity is provided.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalyst materials, in particular to a kind of zeolitic imidazolate framework material (Zeolitic imidazolate frameworks, ZIFs) as a template to construct a supported palladium catalyst for Heck coupling reaction. Background technique [0002] The Heck reaction is an important C-C coupling reaction. Traditional homogeneous Heck reaction noble metal catalysts have problems such as easy deactivation and difficult separation during the reaction process. Loading palladium on various supports to construct a recyclable heterogeneous Supported catalysts remain an important challenge. In recent years, porous carbon-based nanomaterials have become an important class of catalyst supports due to their high specific surface area and excellent physical and chemical properties. [0003] Metal-organic frameworks (MOFs) are a new type of porous functional materials, which are porous network framework mater...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J27/24C07C1/26C07C15/52
CPCB01J23/8913B01J27/24C07C1/26C07C2523/89C07C2527/24C07C15/52
Inventor 豆义波郭瑞梅白金泉周阿武
Owner BEIJING UNIV OF TECH
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