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Preparation method of highly doped nitrogen, phosphorus and carbon nano-sheet for efficient hydrogen production

A carbon nanosheet, high-doping technology, applied in the preparation/purification of carbon, nanotechnology for materials and surface science, nanocarbon, etc., can solve the problem of lack of catalyst design, etc., to increase catalytic active sites, Ease of operation and performance-enhancing effects

Inactive Publication Date: 2019-03-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the goal of researchers to dope carbon materials with high concentration of heteroatoms has not been realized, and there is still a lack of design of dual-doped carbon material system catalysts for efficient electrocatalytic hydrogen production.

Method used

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  • Preparation method of highly doped nitrogen, phosphorus and carbon nano-sheet for efficient hydrogen production
  • Preparation method of highly doped nitrogen, phosphorus and carbon nano-sheet for efficient hydrogen production
  • Preparation method of highly doped nitrogen, phosphorus and carbon nano-sheet for efficient hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Put urea and carbon black with a mass ratio of 4:1, and 0.1-1g of sodium metaphosphate, in a certain volume of deionized water, stir magnetically at 60°C for 90 minutes to form a clear solution, and dry in an oven to obtain a precursor A 1 .

[0020] (2) Precursor A 1 Transferred to a tube furnace under a protective atmosphere, treated at a high temperature of 700°C for 3 hours, and cooled naturally to room temperature to obtain the heteroatom-doped carbon material.

[0021] figure 1 It can be seen from the Raman spectrum of the highly doped nitrogen-phosphorus carbon material obtained in this example that the obtained material is a sheet carbon material with a graphene phase, accompanied by the existence of a large number of defect states.

Embodiment 2

[0023] (1) Put melamine and urea with a mass ratio of 2:1, and 0.5 to 2 g of sodium phosphate in a certain volume of deionized water, stir magnetically at 70°C for 90 minutes to form a clear solution, and dry in an oven to obtain precursor A 1 .

[0024] (2) Precursor A 1 Transferred to a tube furnace in a protective atmosphere, treated at a high temperature of 800°C for 3 hours, and cooled naturally to room temperature to obtain the heteroatom-doped carbon material.

[0025] figure 2 It is the X-ray photoelectron spectrum diagram of the carbon material highly doped with nitrogen and phosphorus prepared in this example. It can be seen from the figure that the obtained material contains nitrogen and phosphorus content, and the nitrogen content is 3.91%, and the phosphorus content is 6.77%.

Embodiment 3

[0027] (1) Put melamine and carbon black at a mass ratio of 4:1, and 0.1-10ml of phytic acid in a certain volume of deionized water, stir magnetically at 70°C for 90 minutes to form a clear solution, and dry in an oven to obtain precursor A 1 .

[0028] (2) Precursor A 1 Transferred to a tube furnace in a protective atmosphere, treated at 900°C for 5 hours at a high temperature, and cooled naturally to room temperature to obtain the heteroatom-doped carbon material.

[0029] image 3 It is a transmission electron microscope image of the carbon material highly doped with nitrogen and phosphorus prepared in this example. It can be seen from the figure that the microscopic morphology of the carbon material is a lamellar structure.

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Abstract

The invention discloses a preparation method of a highly doped nitrogen, phosphorus and carbon nano-sheet for efficient hydrogen production to improve the dosage concentration of heterogeneous atoms such as nitrogen and phosphorus in carbon materials, increase catalytic activity sites in the carbon materials and improve catalytic activity of the carbon materials. An appropriate proportion of nitrogen sources, carbon sources and phosphorus sources are dissolved, stirred, mixed, dried, pyrolyzed and the like to obtain the high-concentration nitrogen and phosphorus doped carbon nano-sheet. The preparation method has the advantages that raw materials are easily obtained, the technology is simple, operation is convenient, the preparation method is low in cost and environmentally friendly and the like. The whole reaction process is low in requirement for preparation equipment, industrial production is facilitated, the prepared materials have nitrogen and phosphorus with high dosage concentration, electro-catalysis hydrogen production performance is effectively improved, and the preparation method has practical industrial significance.

Description

technical field [0001] The invention specifically relates to a method for preparing highly-doped nitrogen-phosphorous carbon nanosheets with high-efficiency hydrogen production, and belongs to the technical field of preparation of new energy materials. Background technique [0002] To meet the challenge of decreasing fossil fuels, the development of electrochemical renewable energy conversion and storage technologies and related materials is imminent. Although noble metal-based catalysts have excellent performance, their large-scale industrial application cannot be realized due to the low reserves of noble metals and high cost. Carbon material is a material with abundant reserves, wide distribution range, low cost, easy synthesis and many synthesis methods. It is widely favored in many industries because of its excellent performance brought by its unique electronic structure. However, due to the lack of effective catalytic active sites on the surface of carbon materials, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/05C01B3/02B82Y30/00
CPCB82Y30/00C01B3/02C01B32/05C01B32/184
Inventor 陈卓陈泽群
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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