Preparation method of fuel cell nonmetal catalyst of nitrogen-phosphorus doped ordered mesoporous carbon material

A non-metallic catalyst and fuel cell technology, which is applied in the preparation/purification of carbon, non-metallic elements, chemical instruments and methods, etc., can solve the problems of large-scale commercialization of PEMFCs, high cost of fuel cells, and application constraints. Achieve good oxygen reduction catalytic performance, good application prospects, and low price

Inactive Publication Date: 2021-02-26
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the widely used ORR catalysts are carbon-supported platinum and platinum alloys. However, precious metals such as platinum are expensive, scarce in resources and easily poisoned, resulting in high cost of fuel cells, which prevents large-scale commercialization of PEMFCs, and its applicability is restricted.

Method used

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  • Preparation method of fuel cell nonmetal catalyst of nitrogen-phosphorus doped ordered mesoporous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A fuel cell non-metallic catalyst of nitrogen and phosphorus doped ordered mesoporous carbon materials, which is obtained by pyrolyzing the composite of mesoporous silica SBA-15 and hexacyclotriphosphazene HCCP, and then removing the silica template, Prepare as follows:

[0019] (1) Weigh 1g of dry SBA-15 and 1g of HCCP into a beaker;

[0020] (2) Add 20 mL of ethanol to the above raw materials, and stir for 12 h at room temperature in a fume hood to completely evaporate the solution;

[0021] (3) Dry the obtained solid mixture at 60 °C, and then place the sample in high-purity N 2 Calcined in a medium tube furnace at a high temperature of 900°C for 4 hours, with a heating rate of 5°C / min;

[0022] (4) Finally, the resulting black powder was removed from the silica template with a 5% (w / w) hydrofluoric acid solution at room temperature to obtain the product, figure 1 It is a schematic diagram of the atomic structure of the metal-free catalyst of the present inventio...

Embodiment 2

[0025] A fuel cell nonmetallic catalyst doped with nitrogen and phosphorus ordered mesoporous carbon materials, similar to the steps in the examples, prepared according to the following steps:

[0026] (1) Weigh 5g of dry SBA-15 and 1g of HCCP in a beaker;

[0027] (2) Add 20 mL of ethanol to the above raw materials, and stir for 12 h at room temperature in a fume hood to completely evaporate the solution;

[0028] (3) Dry the obtained solid mixture at 60 °C, and then place the sample in high-purity N 2 Calcined in a medium tube furnace at a high temperature of 900°C for 4 hours, with a heating rate of 2°C / min;

[0029] (4) Finally, the obtained black powder was removed from the silica template with a 5% (w / w) hydrofluoric acid solution at room temperature to obtain the product.

[0030] The specific surface area of ​​the sample obtained in this embodiment is 55.9m 2 / g, after 200 cycles of stability testing in the potential region of -1.3~1.3V (vs RHE), the electrochemica...

Embodiment 3

[0032] A fuel cell nonmetallic catalyst doped with nitrogen and phosphorus ordered mesoporous carbon materials, similar to the steps in the examples, prepared according to the following steps:

[0033] (1) Weigh 2.5g of dry SBA-15 and 5g of HCCP into a beaker;

[0034] (2) Add 20 mL of methanol to the above raw materials, and stir for 12 h at room temperature in a fume hood to completely evaporate the solution;

[0035] (3) Dry the obtained solid mixture at 60 °C, and then place the sample in high-purity N 2 Calcined in a medium tube furnace at a high temperature of 900°C for 4 hours, with a heating rate of 3°C / min;

[0036] (4) Finally, the obtained black powder was removed from the silica template with a 5% (w / w) hydrofluoric acid solution at room temperature to obtain the product.

[0037] The specific surface area of ​​the sample obtained in this embodiment is 50.8m 2 / g, after 200 cycles of stability testing in the potential region of -1.3~1.3V (vs RHE), the electroch...

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Abstract

The invention discloses a preparation method of a fuel cell non-metal catalyst of a nitrogen-phosphorus doped ordered mesoporous carbon material. According to the method, mesoporous SBA-15 is used asa hard template, and hexapolycyclotriphosphazene (HCCP) in the mesoporous SBA-15 is pyrolyzed to obtain the nitrogen-phosphorus doped ordered mesoporous carbon material. The preparation method has theadvantages that the template method is simple, nitrogen and phosphorus in the carbon skeleton are uniformly doped, pore passages are ordered, and the catalyst has long-term stability and higher tolerance to methanol; that is to say, the invention provides a thought for preparing the high-efficiency metal-free oxygen reduction catalyst by using common chemical raw materials, and has important reference significance. Meanwhile, the method is simple to operate and low in price, and shows good oxygen reduction catalytic performance, so that the method has a good application prospect in the fieldof fuel cells.

Description

technical field [0001] The invention relates to a preparation method of a fuel cell non-metallic catalyst, in particular to a preparation method of a fuel cell non-metallic catalyst doped with nitrogen and phosphorus ordered mesoporous carbon materials. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) are environmentally friendly and energy efficient, making them ideal energy storage devices for portable devices. Oxygen reduction reaction (ORR) is a key reaction in proton exchange membrane fuel cells and plays an important role in industrial production. At present, the widely used ORR catalysts are carbon-supported platinum and platinum alloys. However, precious metals such as platinum are expensive, scarce and easily poisoned, resulting in high cost of fuel cells, which prevents the large-scale commercialization of PEMFCs, and its applicability is restricted. Therefore, the development of novel ORR catalysts has become an urgent task for the devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/205H01M4/96
CPCC01B32/05C01B32/205H01M4/96Y02E60/50
Inventor 崔大祥李梦飞刘鹏飞周霖李天昊葛美英张芳
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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