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Preparation method and application of porous carbon-based catalyst for nitrogen reduction

A catalyst and porous carbon technology, applied in the field of ammonia synthesis, can solve the problems of high cost and low catalytic activity of nitrogen reduction catalysts, and achieve the effects of enhanced nitrogen reduction performance, high catalytic activity and low cost

Pending Publication Date: 2020-01-03
SHENZHEN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for preparing a porous carbon-based nitrogen reduction catalyst in view of the above-mentioned defects of the prior art, aiming at solving the problem that the existing nitrogen reduction catalyst in electrochemical synthesis of ammonia is expensive and has low catalytic activity. The problem

Method used

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  • Preparation method and application of porous carbon-based catalyst for nitrogen reduction
  • Preparation method and application of porous carbon-based catalyst for nitrogen reduction
  • Preparation method and application of porous carbon-based catalyst for nitrogen reduction

Examples

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Effect test

Embodiment 1

[0062] The preparation method of chitin porous carbon-based nitrogen reduction catalyst:

[0063] (1) Take 3g of commercial chitin, put it in a porcelain boat, and pre-oxidize it in an air atmosphere at 250°C for 2 hours. After the reaction is completed, the temperature of the reaction system is lowered to room temperature, and the pre-oxidized chitin-based carbon material is obtained;

[0064] (2) According to ZnCl 2 、CoCl 3 and pre-oxidized chitin-based carbon material in a mass ratio of 1:3:1, in N 2 Heating to 800°C for 2 hours at a heating rate of 5°C / min under atmosphere to obtain a carbonized chitin-based carbon material;

[0065] (3) When cooling to room temperature, remove Co and Zn metal compounds in the chitin-based porous carbon with HCl with a concentration of 2M, and use deionized water to wash 5 times, and dry to obtain the chitin porous carbon-based nitrogen reduction catalyst;

[0066] Performance test of chitin porous carbon-based nitrogen reduction cataly...

Embodiment 2

[0071] Preparation method and performance test of cyclodextrin porous carbon-based nitrogen reduction catalyst:

[0072] (1) Weigh 2g of β-cyclodextrin and 120ml of deionized water, mix and stir, put it in a 50ml polytetrafluoroethylene lining for hydrothermal pretreatment, and treat it at 220°C for 6 hours, and wait for the reaction to complete Finally, after the temperature of the reaction system drops to room temperature, the pretreated cyclodextrin-based carbon material is obtained;

[0073] (2) According to CoCl 3 Mixed with the pretreated cyclodextrin-based carbon material at a mass ratio of 1:1, at N 2 Heating to 800°C for 2 hours at a heating rate of 5°C / min under atmosphere to obtain a carbonized cyclodextrin-based carbon material;

[0074] (3) When cooling to room temperature, remove the metal compound in the cyclodextrin-based carbon material with HCl with a concentration of 2M, and wash it with deionized water for 5 times, and dry to obtain a cyclodextrin porous ...

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Abstract

The invention discloses a preparation method and application of a porous carbon-based catalyst for nitrogen reduction. The preparation method includes the steps: pretreating a glucose unit-containingpolymer raw material so as to obtain a pretreated polymer material, mixing the pretreated polymer material and a pore-forming agent and a catalyst, performing carbonization under the protection actionof inert gas so as to obtain a porous carbon material, washing the porous carbon material sequentially with an acid and deionized water, and then performing forced air drying so as to obtain the carbon-based nitrogen-reduction catalyst. The glucose unit-containing polymer raw material is adopted as a raw material, single atoms are formed through coordinate anchoring of transition metal so as to obtain multiple active centers, and baking carbonization is perfomed in the pore-form agent so as to obtain the porous carbon-based nitrogen-reduction catalyst with a high specific surface area, so that the nitrogen reduction performance of the carbon-material non-noble metal catalyst is enhanced, and the nitrogen reduction catalyst with low cost and high catalytic activity is prepared under mild,safe and environment-friendly conditions.

Description

technical field [0001] The invention relates to the technical field of ammonia synthesis, in particular to a preparation method and application of a porous carbon-based nitrogen reduction catalyst. Background technique [0002] The massive consumption of fossil fuels and the resulting serious environmental pollution have attracted people's attention. On the premise of realizing sustainable development, it is imperative to develop renewable energy and its conversion technology. Electrochemical energy storage and related conversion technologies have always been a research hotspot in the field of clean energy technology due to their advantages of simple operation and high energy conversion efficiency. The cheap and easy-to-get small molecular compounds (such as H 2 O, N 2 , CO 2 etc.) into high value-added chemicals (such as H 2 , NH 3 、CH 3 CH 2 OH, etc.), so as to achieve efficient energy conversion, is a feasible path for the development of new energy technologies. ...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J35/10C25B11/06C25B1/00
CPCB01J21/18C25B1/00C25B11/043B01J35/33B01J35/60
Inventor 邓立波宁丽娟姚蕾陈家祥黄海燕张培新
Owner SHENZHEN UNIV
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