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Oxygen-doped carbon-based nickel carbide nano composite material as well as preparation method and application thereof

A nano-composite 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 heteroatom doping and regulation of composite materials, and achieve low cost, performance improvement, and simple process Effect

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

The existing preparation methods are difficult to control the heteroatom doping of composite materials
[0007] In summary, there is still a lack of a green, simple, and low-cost method for preparing small-sized carbon-based nickel carbide nanoparticles doped with rich oxygen atoms, which is also one of the difficulties in this field.

Method used

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  • Oxygen-doped carbon-based nickel carbide nano composite material as well as preparation method and application thereof
  • Oxygen-doped carbon-based nickel carbide nano composite material as well as preparation method and application thereof
  • Oxygen-doped carbon-based nickel carbide nano composite material as well as preparation method and application thereof

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preparation example Construction

[0043]Another aspect of the present invention provides a method of preparing the oxygen-doped carbon-based nickel nickel nanocomposites, including steps as follows:

[0044]Preparation of the precursor of the nickel source, no nitrogen-free organic carboxylic acid and alkali metal salt;

[0045]The precursor was picked under an inert atmosphere to obtain a nanocomposite; wherein the pyrolysis temperature was 310 ° C to 340 ° C.

[0046]According to the present invention, in an early study, the inventors have found that a nickel-coated nanocomposites can be obtained by a method of pyrolysis by precursor, for example, patented CN 109309213A discloses a carbon cladding nickel nanocomposite and a preparation method thereof. Among them, the temperature of the precursor constant temperature section is 425 ° C to 800 ° C. In fact, the preparation temperature range of the preparation of carbon coated nickel nanoparticles in the present pyrolysis method is also usually carried out at the foregoing te...

Embodiment 1

[0066]This example is used to illustrate the preparation of oxygen-doped carbon-based nickel nickel nanocomposites of the present invention.

[0067]1) Weigh 10.51 g (50 mmol) of a hydrated citric acid, 4.64 g (50 mmol) nickel hydroxide, 5.84 g (100 mmol) sodium chloride added 150 ml of deionized water, stirred at 110 ° C to obtain a uniform solution, and continued heating steam Dry, obtain the solid after polishing to get the precursor.

[0068]2) Take 7G Step 1) The resulting precursor is placed in the porcelain boat, and then the porcelain boat is placed in the constant temperature zone of the tube furnace, and the nitrogen gas, the flow rate is 100 ml / min, and the rate of temperature is heated to 330 ° C at a rate of 1 ° C / min. After 150 min, the constant temperature stopped heating and cooled to room temperature under a nitrogen atmosphere.

[0069]3) Transfer the composite of the porcelain to the porcelain obtained by step 2) to the flask, add 50 ml of deionized water, stirred at 6...

Embodiment 2

[0073]This example is used to illustrate the preparation of oxygen-doped carbon-based nickel nickel nanocomposites of the present invention.

[0074]1) Weigh 10.51 g (50 mmol) of a hydrated citric acid, 4.64 g (50 mmol) nickel hydroxide, 11.69 g (200 mmol) sodium chloride, add 150 mL of deionized water, stirred at 110 ° C to obtain a uniform solution, and continue to heat soon Dry, obtain the solid after polishing to get the precursor.

[0075]2) Take 8G Step 1) The precursor is placed in the porcelain boat, then the porcelain boat is placed in the constant temperature zone of the tube furnace, and the flow of nitrogen, 100 ml / min, and warm up at a rate of 1.5 ° C / min to 330 ° C After 150 min, the constant temperature stopped heating and cooled to room temperature under a nitrogen atmosphere.

[0076]3) Transfer the composite of the porcelain to the porcelain obtained by step 2) to the flask, add 50 ml of deionized water, stirred at 60 ° C for 20 minutes, filtrate, dry the filter cake at...

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Abstract

The invention provides an oxygen-doped carbon-based nickel carbide nano composite material as well as a preparation method and an application thereof, the nano composite material comprises an oxygen-doped carbon matrix and nickel carbide nano particles loaded on the carbon matrix, and in a C1s X-ray photoelectron spectrogram of the nano composite material, a spectral peak exists in a binding energy range of 287eV to 290eV. The nano composite material adopts a method of pyrolyzing a metal salt precursor, the nano composite material containing rich oxygen-doped carbon matrix and nickel carbide nano particles loaded on the carbon matrix is obtained by strictly and accurately controlling reaction conditions, and the material has good application prospects in catalytic hydrogenation reaction or electrocatalytic reaction and the like.

Description

Technical field[0001]The present invention relates to the technical field of transition metal carbide composites, and more particularly to oxygen-doped carbon-based nickel nickel nanocomposites and preparation methods and applications thereof.Background technique[0002]The transition metal carbide is a class of reciprocal compounds produced by carbon atoms into transition metal lattice, combining a covalent solid, ion crystal, and transition metal characteristics.[0003]Transition metal carbides have many excellent properties, including high hardness, high melting point, high electrical conductivity, and have been applied in the fields of supercapacitors, catalysis, and electrocatalysis, and thus have received extensive attention from researchers.[0004]Barbide as a typical transition metal carbide, the main synthetic method includes a vapor deposition method, mechanical alloying, and liquid phase. Such as SARR et al (J. Phys.Chem, 2014, 118 (40), 23385-23392) with acetylacetone nickel...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J35/02C07C5/05C07C15/073
CPCB01J27/22C07C5/05C07C2527/22B01J35/23B01J35/33B01J35/50C07C15/073
Inventor 吴耿煌荣峻峰达志坚林伟国谢婧新纪洪波
Owner CHINA PETROLEUM & CHEM CORP
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