Preparation method of sulfur and phosphorus doped carbon material and product and application of sulfur and phosphorus doped carbon material

A carbon material, sulfur doping technology, applied in chemical instruments and methods, nano-carbon, carbon compounds, etc., can solve the problems of uneven dispersion of platinum nanoparticles, difficult platinum loading, low catalytic activity, etc., and achieve excellent mass ratio. Activity, the effect of improving catalytic activity and its stability, and simple process

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the degree of graphitization can effectively alleviate carbon corrosion, but the high degree of graphitization also makes the surface of the carbon carrier chemically inert, making it difficult to evenly disperse platinum on the carbon carrier, especially when the amount of platinum loaded is high
[0007] The chemical reduction method is a commonly used method for the manufacture of platinum-carbon catalysts. The advantage is that the process is simple, and the disadvantage is that the utilization rate of platinum is low and the catalytic activity is low.
The reason may be that the irregular carbon support pore structure leads to uneven dispersion of platinum nanoparticles.

Method used

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  • Preparation method of sulfur and phosphorus doped carbon material and product and application of sulfur and phosphorus doped carbon material
  • Preparation method of sulfur and phosphorus doped carbon material and product and application of sulfur and phosphorus doped carbon material
  • Preparation method of sulfur and phosphorus doped carbon material and product and application of sulfur and phosphorus doped carbon material

Examples

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Comparison scheme
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preparation example Construction

[0086] The invention provides a method for preparing a sulfur-phosphorus-doped carbon material, comprising: contacting the sulfur-doped carbon material with a phosphorus source, and treating (preferably constant temperature treatment) at 300°C to 800°C for 0.5h to 10h in an inert gas, The sulfur-phosphorus-doped carbon material is obtained.

[0087] According to the preparation method of the sulfur-phosphorus-doped carbon material of the present invention, the sulfur-doped carbon material is preferably mixed with a phosphorus source, and then treated (preferably constant temperature treatment) at 300°C to 800°C for 0.5h to 10h in an inert gas. One mixing method is to mix the sulfur-doped carbon material with the phosphorus source solution, impregnate and then dry; the phosphorus source solution is preferably an aqueous phosphorus source solution.

[0088] According to the preparation method of sulfur and phosphorus doped carbon materials of the present invention, the phosphorus ...

Embodiment 1

[0179] This example is used to illustrate the sulfur and phosphorus doped carbon material of the present invention.

[0180] Mix Vulcan XC72 and elemental sulfur evenly, the mass ratio of the two is 10:1, put it in a tube furnace, raise the temperature of the tube furnace to 1400 °C at a rate of 8 °C / min, and then treat it at a constant temperature for 2 hours. After cooling down naturally A sulfur-doped carbon material is obtained.

[0181] Immerse 1g of the aforementioned sulfur-doped carbon material in 15mL of 3wt% phosphoric acid aqueous solution for 24h; dry it in an oven at 100°C; then put it into a tube furnace, and raise the temperature of the tube furnace at a rate of 10°C / min to 500°C, constant temperature treatment for 3 hours; after natural cooling, a sulfur-phosphorus-doped carbon material was obtained, numbered as carbon carrier A.

[0182] Sample Characterization and Testing

[0183] For the sulfur-phosphorus-doped carbon material in this example, the mass fra...

Embodiment 2

[0188] This example is used to illustrate the sulfur and phosphorus doped carbon material of the present invention.

[0189] Mix Ketjenblack ECP600JD and elemental sulfur evenly, the mass ratio of the two is 4:1, put it in a tube furnace, raise the temperature of the tube furnace to 1200 °C at a rate of 5 °C / min, and then treat it at a constant temperature for 2 hours. After cooling down naturally A sulfur-doped carbon material is obtained.

[0190] Add 1g of the aforementioned sulfur-doped carbon material to 35mL of 0.1wt% phosphoric acid aqueous solution and impregnate for 24h; dry it in an oven at 100°C; then place it in a tube furnace, and raise the temperature of the tube furnace at a rate of 9°C / min to 400° C., and then treated at a constant temperature for 3 hours. After natural cooling, a sulfur-phosphorus-doped carbon material was obtained, which was designated as carbon support B.

[0191] Sample Characterization and Testing

[0192] For the sulfur-phosphorus-doped...

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Abstract

The invention relates to a preparation method of a sulfur-phosphorus-doped carbon material and a product and application thereof, and the method comprises the following steps: contacting a sulfur-doped carbon material with a phosphorus source, and carrying out high-temperature treatment in inert gas to obtain the sulfur-phosphorus-doped carbon material. The platinum-carbon catalyst prepared by taking the sulfur-phosphorus doped carbon material as a carrier has excellent catalytic performance.

Description

technical field [0001] The invention relates to a preparation method of a sulfur-phosphorus-doped carbon material and its product and application. Background technique [0002] In the field of chemistry, carbon materials are not only important supports, but also commonly used catalysts. Carbon elements are rich in bonding methods, and carbon materials can be modified in various ways to obtain better performance. [0003] Oxygen reduction reaction (ORR) is a key reaction in the field of electrochemistry, for example, in fuel cells and metal-air batteries, the oxygen reduction reaction is the main factor affecting the battery performance. Carbon materials doped with atoms can be directly used as catalysts for oxygen reduction reactions. When used as an oxygen reduction catalyst, it has been reported in the literature that nitrogen, phosphorus, boron, sulfur, fluorine, chlorine, bromine, iodine and other elements are doped into carbon materials, among which nitrogen is close ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194C01B32/174C09C1/56B01J27/185H01M4/90H01M4/92
CPCC01B32/194C01B32/174C09C1/56B01J27/1856B01J35/0033H01M4/926H01M4/9083H01M4/9058C01B2204/32C01B2204/22
Inventor 荣峻峰赵红王厚朋彭茜张家康顾贤睿谢南宏
Owner CHINA PETROLEUM & CHEM CORP
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