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Sulfur-nitrogen doped carbon material and preparation method and application thereof

A carbon material and sulfur-nitrogen technology, which is applied in the fields of sulfur-nitrogen doped carbon material and its preparation and application, can solve the problems of scarcity of resources and high price of platinum, and achieve the effect of improving catalytic performance and excellent performance.

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

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Problems solved by technology

Among the metals, platinum has the highest catalytic activity for the oxygen reduction reaction, but platinum is expensive and scarce resources, which restrict its large-scale application.

Method used

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  • Sulfur-nitrogen doped carbon material and preparation method and application thereof
  • Sulfur-nitrogen doped carbon material and preparation method and application thereof
  • Sulfur-nitrogen doped carbon material and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0099] According to the method for preparing sulfur-nitrogen-doped carbon material of the present invention, in the operation of doping sulfur, if the temperature needs to be raised, the heating rate is not lower than 8°C / min, which can be 8°C / min-15°C / min.

[0100] According to the preparation method of the sulfur-nitrogen doped carbon material of the present invention, any existing known nitrogen doping method can be used. According to the preparation method of the present invention, the operation of doping nitrogen is performed before or after the operation of doping sulfur. That is, the operation of doping nitrogen is carried out first to obtain a carbon material doped with nitrogen, and then the operation of doping sulfur with the carbon material already doped with nitrogen is carried out by the aforementioned method; or, the operation of doping sulfur is first carried out by the aforementioned method , to prepare a sulfur-doped carbon material, and then perform a nitroge...

Embodiment approach

[0112] The present invention provides a preferred embodiment, including:

[0113] (1) The step of impregnating the nitrogen source: mixing the carbon material with the nitrogen source aqueous solution and impregnating to obtain the carbon material impregnated with the nitrogen source;

[0114] (2) The step of manufacturing sulfur and nitrogen doped carbon material: place the carbon material impregnated with nitrogen source obtained in (1) in an inert gas containing thiophene, and treat it at 1000°C to 1500°C (preferably constant temperature treatment) for 0.5h ~10h.

[0115] A carbon material doped only with thiophene-type sulfur and pyrrole-type nitrogen can be produced by using the above-mentioned embodiment.

[0116] According to the preparation method of sulfur-nitrogen doped carbon material of the present invention, in the operation of doping sulfur, one embodiment is to place the carbon material in a tube furnace, and feed the carrier gas containing thiophene at 8°C / min...

Embodiment 1

[0143] This example is used to illustrate the preparation of sulfur and nitrogen doped carbon materials and the preparation of platinum-carbon catalysts.

[0144] Immerse 1g of Vulcan XC72 in 20mL of 2wt% ammonia solution for 24 hours, dry it in an oven at 100°C and place it in a tube furnace. The carrier gas (nitrogen) enters the tube furnace after passing through a bubbler filled with thiophene. The temperature of the tube furnace was raised to 1200°C at a rate of 10°C / min, and then treated at a constant temperature for 3 hours. After natural cooling, a sulfur-nitrogen doped carbon material was obtained, which was designated as carbon support A. The quality of thiophene is based on the mass of sulfur contained in it, and the mass ratio of Vulcan XC72 to thiophene is 3:1. The amount of thiophene is controlled by the ventilation rate of the carrier gas, and the ventilation rate of the carrier gas corresponding to the different dosages of thiophene is calibrated in advance acco...

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Abstract

The invention relates to a sulfur-nitrogen-doped carbon material and a preparation method and application thereof, in the sulfur-nitrogen-doped carbon material, the combination mode of sulfur and nitrogen with the carbon material is more uniform, and the sulfur-nitrogen-doped carbon material is suitable for being used as a catalyst or a carrier of the catalyst.

Description

technical field [0001] The invention relates to a sulfur and nitrogen doped carbon material, a preparation method and application thereof. Background technique [0002] Carbon materials have a wide range of sources and rich properties, and have been widely used in various technical fields. 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 in order 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, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/168C01B32/194H01M4/92H01M8/22H01M12/06H01M12/08
CPCC01B32/05C01B32/168C01B32/194H01M4/926H01M8/22H01M12/08H01M12/06Y02E60/50
Inventor 赵红荣峻峰顾贤睿谢南宏张家康彭茜王厚朋顾方伟
Owner CHINA PETROLEUM & CHEM CORP
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