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Metallic carbon-containing catalyst and preparation method and application thereof

A catalyst and metal technology, applied in the field of metal carbon-containing catalyst and its preparation, can solve the problems of unsuitability for large-scale production, low catalyst life, complicated preparation method, etc., and achieve the effects of improved specific surface area, high catalytic efficiency and simple process

Inactive Publication Date: 2017-05-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bimetallic catalyst is a combination of two metal catalysts without introducing a carrier, so the catalyst has a low lifespan and can only be used for CO 2 Catalysis of coupling reactions, not suitable for reactions such as oxygen oxidation or hydrogen reduction
[0005] The activity of metal carbon-containing catalysts in the prior art is relatively low, the loading rate is low, and the preparation method is complicated, which is not suitable for large-scale production. Therefore, it is very important to study a new preparation method of metal carbon-containing catalysts

Method used

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  • Metallic carbon-containing catalyst and preparation method and application thereof
  • Metallic carbon-containing catalyst and preparation method and application thereof
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preparation example Construction

[0053] The specific embodiment part of the present invention provides a kind of preparation method of metal carbon-containing catalyst, and described preparation method comprises the following steps:

[0054] (1) dissolving at least two transition metal compounds in solvent A to obtain solution a;

[0055] (2) dissolving the imidazole compound in solvent B to obtain solution b;

[0056] (3) Mixing and stirring solution a in step (1) and solution b in step (2), separating solid and liquid, and calcining the obtained precipitate under the protection of an inert gas to obtain a metal carbon-containing catalyst.

[0057] For better illustrating the present invention, facilitate understanding technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:

Embodiment 1

[0059] A kind of preparation method of metal carbon-containing catalyst, described preparation method comprises the following steps:

[0060] (1) 3g of cobalt nitrate and 0.5g of nickel nitrate are mixed and ground, dissolved in 100mL of methanol to obtain mixed solution a;

[0061] (2) 9g of imidazole was dissolved in 300mL of methanol to obtain solution b;

[0062] (3) Mix solution a in step (1) with solution b in step (2), stir at a speed of 100 rpm for 12 hours, then centrifuge at a speed of 10,000 rpm for 5 minutes, collect the precipitate, and calcinate at 900 ° C for 3 hours under nitrogen protection to obtain Co -Ni-N / C catalyst.

Embodiment 2

[0064] A kind of preparation method of metal carbon-containing catalyst, described preparation method comprises the following steps:

[0065] (1) Mix 3 g of cobalt nitrate, 0.5 g of nickel nitrate and 0.5 g of ferrous sulfate, and dissolve them in 200 mL of N,N-dimethylformamide to obtain a mixed solution a;

[0066] (2) 15g of 2-methylimidazole was dissolved in 500mL N,N-dimethylformamide to obtain solution b;

[0067] (3) Mix solution a in step (1) with solution b in step (2), stir at 80 rpm for 24 hours, then centrifuge at 8000 rpm for 10 minutes, collect the precipitate, and calcinate at 800 ° C for 4 hours under the protection of argon to obtain Co-Ni-Fe-N / C catalyst.

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Abstract

The invention relates to a preparation method for a metallic carbon-containing catalyst. The preparation method dissolves at least two types of transition metal compounds into a solvent A, so that a solution a is obtained; an imidazole compound is dissolved into a solvent B, so that a solution b is obtained; the solution a and the solution b are mixed and stirred, solid-liquid separation is carried out, obtained precipitate is calcined under inert gas protection, and thereby the metallic carbon-containing catalyst is obtained. By the method of preparing MOFs and then carrying out in-situ carbonization, the preparation method obtains the catalyst with an M-N-C structure, and because the carbon skeleton has a large specific surface area, the catalytic performance of the catalyst is further increased.

Description

technical field [0001] The invention relates to the field of catalysts, and relates to a metal carbon-containing catalyst, a preparation method and application thereof. Background technique [0002] In 2009, the Yaghi research group in the United States was adsorbing CO 2 A major breakthrough has been made in the research of materials, and a class of zeolitic imidazolate frameworks (ZIFs for short) was systematically synthesized and named. This material can absorb 82.6 times its own volume of CO 2 , and more importantly, high selectivity. In recent years, many researchers have tried to develop the catalytic performance of such materials, and the stored CO 2 Converted into useful fuels such as methanol, or as a catalyst to catalyze H in fuel cells 2 Oxidation reaction or O 2 The reduction reaction not only solves the problem of greenhouse effect, but also realizes the recycling of clean energy. In this process, through the modification of different transition metal cente...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10
CPCB01J27/24B01J35/61
Inventor 刘晨明李泽晖李玉平赵赫曹宏斌张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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