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Nitrogen-doped carbon-loaded metal copper/cerium dioxide composite catalyst as well as preparation method and application thereof

A composite catalyst, nitrogen-doped carbon technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as complicated process, achieve simple process, Good catalytic stability and good application effect

Active Publication Date: 2021-01-08
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional nitrogen-doped carbon process is to inject or wrap the nitrogen-rich nitrogen source precursor on the carbon carrier of the pre-template by means of polymerization or impregnation, and the process is often cumbersome.

Method used

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  • Nitrogen-doped carbon-loaded metal copper/cerium dioxide composite catalyst as well as preparation method and application thereof
  • Nitrogen-doped carbon-loaded metal copper/cerium dioxide composite catalyst as well as preparation method and application thereof
  • Nitrogen-doped carbon-loaded metal copper/cerium dioxide composite catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A nitrogen-doped carbon-supported metal copper / cerium oxide composite catalyst, the preparation method comprising the following steps:

[0040] 1) 10g glucose, 2.5g cerium nitrate hexahydrate (Ce(NO) 3 ) 2 ·6H 2 O) and 10g of ammonium chloride are mixed evenly, heated to 130 ° C and stirred to a molten state, then placed in an oven for carbonization to obtain solid mixture A;

[0041] The solid mixture A was ground, placed in a tube furnace, heated to 400°C at a rate of 5°C / min in an argon atmosphere, and calcined for 3 hours to obtain a nitrogen-doped carbon-coated cerium oxide precursor material;

[0042] 2) Take 0.9 g of the precursor material obtained in step 1) and evenly disperse it in 5 mL of deionized water, dissolve 0.38 g of copper nitrate trihydrate in another 5 mL of deionized water, and after it is completely dissolved, mix the above two solutions and stir for 24h , and then dried in an oven at 80 °C to obtain a solid mixture B; the solid mixture B was pla...

Embodiment 2

[0048] The preparation method of the composite catalyst described in Example 2 is roughly the same as that in Example 1, except that the mass ratio of the corresponding carbon source and nitrogen source in step 1) is 2:1.

Embodiment 3

[0050] The preparation method of the composite catalyst described in Example 3 is roughly the same as that in Example 1, except that the mass ratio of the corresponding carbon source and nitrogen source in step 1) is 1:1.

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Abstract

The invention discloses a nitrogen-doped carbon-loaded metal copper / cerium oxide composite catalyst which is characterized in that nitrogen-doped carbon-coated cerium oxide is used as a carrier, and metal copper particles are uniformly distributed on the surface of the carrier step by step; wherein the loading capacity of the metal copper is 5-10wt%, and the content of cerium oxide in the carrieris 10-20wt%. According to the preparation method, a carbothermic method and an impregnation method are combined, the composite catalyst with the metal copper active sites and the nitrogen-doped carbonactive sites at the same time can be obtained, the formed biorthogonal active site composite catalyst has high selectivity, a high reaction conversion rate is achieved on the basis that reaction conditions are relatively mild, and the application effect is good; and the related preparation method is simple, convenient to operate and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the fields of catalyst synthesis and chemical engineering, and in particular relates to a nitrogen-doped carbon-supported metal copper / cerium oxide composite catalyst and a preparation method and hydrogenation application thereof. Background technique [0002] Carbon supports are the most widely studied and used inorganic non-metallic material supports. Due to their special properties such as high porosity, uniform and interconnected pores, they have received a lot of attention in adsorption, capacitors, catalysis, etc. Its chemical inertness can maximize the retention of the catalytic properties of the metal active component itself. However, the weak interaction between the catalytically active components and mesoporous carbons can easily cause the active components to agglomerate or transfer to the reaction system and be lost, thus affecting the service life and stability of carbon-supported catalysts. Therefore, the develop...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/78B01J37/02B01J37/08C07C29/149C07C31/04C07C31/20
CPCB01J27/24B01J23/78B01J37/0201B01J37/08C07C29/149C07C31/04C07C31/202Y02P20/52
Inventor 姜兴茂胡仕华宋文静季凯唐卓明
Owner WUHAN INSTITUTE OF TECHNOLOGY