FeCo/N-C nano composite material as well as preparation method and application thereof

A nanocomposite material and reaction technology, which is applied in the field of FeCo/N-C nanocomposite material and its preparation, can solve problems such as harsh reaction conditions, and achieve the effects of high energy utilization rate, strong reusability, and good catalytic effect

Active Publication Date: 2022-05-27
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problem of harsh reaction conditions of the existing ammonia synthesis catalyst, the present invention provides a FeCo / N-C nanocomposite material in the shape of a porous rod with high purity and good properties

Method used

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  • FeCo/N-C nano composite material as well as preparation method and application thereof
  • FeCo/N-C nano composite material as well as preparation method and application thereof
  • FeCo/N-C nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of FeCo / N-C nanocomposite material, the steps are:

[0029] a. Preparation of precursors

[0030] 0.12g FeCl 2 ·4H 2 The O powder was dispersed in 20 mL of deionized water, and 0.12 g of Co(NO 3 ) 2 ·6H 2 O powder, stirred at room temperature for 10 minutes, then added 0.25g of NTA and 20mL of isopropanol after the dispersion was completed, stirred at room temperature for half an hour, stirred evenly and moved it to the autoclave, and reacted at 170 ° C for 7 hours; The liquid was centrifuged at 4000 rpm and the precipitate was filtered out. The precipitate was washed with water until neutral and then washed with absolute ethanol for 3 times. The obtained solid sample was placed in a vacuum oven and dried at 60 °C for 12 hours to obtain 0.30 g of the precursor.

[0031] b. Preparation of FeCo / N-C nanocomposites

[0032] Under argon protection, 0.30 g of the precursor was calcined in a tube furnace, the heating rate was controlled at 5 °C / min, ...

Embodiment 2

[0039] A preparation method of FeCo / N-C nanocomposite material, the steps are:

[0040] a. Preparation of precursors

[0041] 0.12g FeCl 2 ·4H 2 The O powder was dispersed in 20 mL of deionized water, and 0.12 g of Co(NO 3 ) 2 ·6H 2 O powder, stir at room temperature for 10 minutes, add 0.35g of NTA and 20mL of isopropanol after the dispersion is completed, stir at room temperature for half an hour, stir it evenly, move it to the autoclave, and react at 190 ° C for 5 hours; The liquid was centrifuged at 4000 rpm and the precipitate was filtered out. The precipitate was washed with water until it became neutral and then washed three times with absolute ethanol. The obtained solid sample was placed in a vacuum oven and dried at 60 °C for 12 hours to obtain 0.37 g of the precursor.

[0042] b. Preparation of FeCo / N-C nanocomposites

[0043] Under argon protection, 0.37g of the precursor was calcined in a tube furnace, the heating rate was controlled at 5°C / min, the temperat...

Embodiment 3

[0047] A preparation method of FeCo / N-C nanocomposite material, the steps are:

[0048] a. Preparation of precursors

[0049] 0.12g FeCl 2 ·4H 2 The O powder was dispersed in 20 mL of deionized water, and 0.12 g of Co(NO 3 ) 2 ·6H 2 O powder, stir at room temperature for 10 minutes, add 0.45g of NTA and 20mL of isopropanol after the dispersion is completed, stir at room temperature for half an hour, stir it evenly, move it to the autoclave, and react at 180 ° C for 6 hours; The liquid was centrifuged at 4000 rpm and the precipitate was filtered out. The precipitate was washed with water until it became neutral and then washed three times with absolute ethanol. The obtained solid sample was placed in a vacuum oven and dried at 60 °C for 12 hours to obtain 0.43 g of the precursor.

[0050] b. Preparation of FeCo / N-C nanocomposites

[0051] Under argon protection, 0.43g of the precursor was calcined in a tube furnace, the heating rate was controlled at 5°C / min, the temperat...

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Abstract

The invention relates to the field of catalysts, and provides a FeCo/N-C nano composite material which is in a rod shape, has a porous structure and is high in catalytic efficiency aiming at the problem that the reaction condition of the existing synthetic ammonia catalyst is harsh. The invention also provides a preparation method of the catalyst, which comprises the following steps: a, dissolving Fe salt, Co salt and ligand in a solvent, heating for reaction, and separating out precipitate after the reaction is finished to obtain a precursor; and b, calcining the precursor to obtain the FeCo/N-C nano composite material. The preparation method is simple, and the prepared catalyst is high in purity. The invention also provides application of the catalyst in electrocatalytic nitrogen fixation ammonia synthesis.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a FeCo / N-C nanocomposite material and a preparation method and application thereof. Background technique [0002] Ammonia, as an important material in the fields of plastics industry, caustic soda industry, and fertilizer industry, has a wide range of applications. The traditional Haber process for ammonia makes industrial ammonia production possible. However, due to the harsh reaction conditions, equipment and power requirements, low conversion rate, high energy consumption, heavy pollution and high cost in the production process, for a long time, how to achieve nitrogen fixation under relatively mild conditions has always been a problem. A popular area of ​​chemical research. On the other hand, with the rapid development of industry, a large amount of nitrate flows into the environment, pollutes the groundwater, threatens people's health, and destroys the natural nitrogen cycle. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/27C25B1/55C25B11/03C25B11/091
CPCC25B1/27C25B1/55C25B11/03C25B11/091Y02P20/133Y02P20/52
Inventor 高鹏邓苹
Owner HANGZHOU NORMAL UNIVERSITY
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