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Carbon-coated nickel carbide nano composite material as well as preparation method and application thereof

A nanocomposite material and nickel carbide technology, which is applied in the direction of carbon compound catalysts, chemical instruments and methods, hydrogenation hydrocarbon production, etc., can solve the problems of cumbersome preparation process of precursors, and achieve the effect of low cost and simple preparation process

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this precursor is still relatively cumbersome, and flammable and explosive hydrogen needs to be introduced during the pyrolysis process.
[0005] In summary, there is still a lack of a green, simple and low-cost method for preparing small-sized nickel carbide materials in this field

Method used

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  • Carbon-coated nickel carbide nano composite material as well as preparation method and application thereof
  • Carbon-coated nickel carbide nano composite material as well as preparation method and application thereof
  • Carbon-coated nickel carbide nano composite material as well as preparation method and application thereof

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preparation example Construction

[0042] A second aspect of the present invention provides a method for preparing the above carbon-coated nickel carbide nanocomposite, comprising the following steps:

[0043] The nickel source and the carboxylic acid containing amino groups are placed in a solvent, heated and stirred to form a homogeneous solution;

[0044] removing the solvent in the homogeneous solution to obtain a precursor;

[0045] The precursor is pyrolyzed under an inert atmosphere to obtain a nanocomposite material; wherein, the pyrolysis temperature is 330°C to 350°C.

[0046] According to the present invention, in early studies, the inventors found that carbon-coated nickel nanocomposites can be obtained by precursor pyrolysis, for example, patent CN 109309213A discloses a carbon-coated nickel nanocomposite and its preparation method , wherein the temperature of the precursor constant temperature section is 425°C to 800°C. In fact, the temperature range for the preparation of carbon-coated nickel n...

Embodiment 1

[0064] This example is used to illustrate the preparation of the carbon-coated nickel carbide nanocomposite material of the present invention.

[0065] 1) Weigh 7.31g (25mmol) of ethylenediaminetetraacetic acid and 4.64g (50mmol) of nickel hydroxide into 200mL of deionized water, stir at 110°C to obtain a homogeneous solution, continue to heat and evaporate to dryness, and grind the solid to obtain a precursor body.

[0066] 2) Take 8g of the obtained precursor and place it in a porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, pass nitrogen gas at a flow rate of 100mL / min, and raise the temperature to 340°C at a rate of 1°C / min. Stop heating after 120 min, and cool to room temperature under a nitrogen atmosphere to obtain a carbon-coated nickel carbide nanocomposite.

[0067] Material Characterization:

[0068] figure 1 is the thermogravimetric curve of the precursor prepared in step 1) of Example 1 under a nitrogen atmosph...

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Abstract

The invention provides a carbon-coated nickel carbide nano composite material and a preparation method and an application thereof, the nano composite material comprises a core-shell structure with a shell layer and an inner core, the shell layer is a graphitized carbon layer doped with oxygen and nitrogen, the inner core is nickel carbide nano particles, and based on the total mass of the nano composite material, the nitrogen content is 0.5%-8%. According to the method, the nano composite material with nickel carbide coated with a graphitized carbon layer is obtained by adopting a method of pyrolyzing a metal salt precursor and accurately controlling reaction conditions, the method is simple in process and low in cost, and the obtained material has a good application prospect in a catalytic hydrogenation reaction or an electrocatalytic reaction and the like.

Description

technical field [0001] The invention belongs to the technical field of transition metal carbide composite materials, and in particular relates to a carbon-coated nickel carbide nanocomposite material and a preparation method and application thereof. Background technique [0002] Transition metal carbides are a class of mesenchymal compounds produced by embedding carbon atoms into transition metal lattices, which have the properties of covalent solids, ionic crystals, and transition metals. Because transition metal carbides have many excellent properties, including high hardness, high melting point, and high conductivity, and have applications in supercapacitors, catalysis, and electrocatalysis, they have attracted extensive attention from researchers. [0003] Nickel carbide is a typical transition metal carbide, and its main synthesis methods include vapor phase deposition, mechanical alloying and liquid phase method. For example, Sarr et al. (J.Phys.Chem.C, 2014, 118(40),...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J27/24B01J35/02C07C5/03C07C15/073
CPCB01J27/24B01J27/22C07C5/03C07C2527/22C07C2527/24B01J35/33B01J35/398B01J35/40C07C15/073Y02E60/13
Inventor 吴耿煌荣峻峰达志坚徐国标林伟国谢婧新纪洪波
Owner CHINA PETROLEUM & CHEM CORP
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