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Novel Pt-Co/NC catalyst and preparation method and application thereof

A catalyst, pt-co technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of increasing the production cost and high price of platinum/carbon catalysts, and achieve global energy distribution and development, low manufacturing environmental load, good quality Effects of Thermal Conductivity and Electron Transportability

Pending Publication Date: 2020-11-24
广东能创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of nano-scale rare precious metal platinum is relatively high, which greatly increases the production cost of platinum / carbon catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of novel Pt-Co / NC catalyst, comprises the following steps:

[0034] S1. Dissolve 26g of 2-methylimidazole and 6.5g of triethylamine in a beaker with 600ml of water, ultrasonicate for 2min and stir for 30min at room temperature successively to obtain a clear suspension A; 8.62g of cobalt acetate Dissolve in a beaker with 200 ml of aqueous solution, stir at room temperature for 10 min to obtain solution B.

[0035] S2. Add Solution B to Suspension A at room temperature, stir Suspension A with a magnet while adding, stir the resulting mixture at room temperature for 1 h, then continue stirring at 25° C. for 12 h to obtain Suspension C.

[0036] S3. The upper and lower layers of the suspension C appeared after standing still. The upper layer was a clear solution, and the lower layer was a purple suspension. During this period, it was washed with water and ethanol three times in sequence, and then placed in a vacuum drying oven at a vacuum dryin...

Embodiment 2

[0041] S1. Dissolve 26g of 2-methylimidazole and 6.5g of triethylamine in a beaker filled with 600ml of water, sonicate at room temperature for 2min and stir for 30min to obtain a clear suspension A. Dissolve 8.62 g of cobalt acetate in a beaker containing 200 ml of aqueous solution, and stir at room temperature for 10 min to obtain solution B.

[0042] S2. Add solution B to suspension A at room temperature, stir suspension A with a magnet while adding, stir the obtained mixture at room temperature for 1 h, and then continue stirring at 25 degrees for 12 h to obtain suspension C.

[0043]S3. The upper and lower layers of the suspension C appeared after standing still. The upper layer was a clear solution, and the lower layer was a purple suspension. During this period, it was washed with water and ethanol three times successively, and then dried at a certain temperature in a vacuum oven to obtain solid D.

[0044] S4. The solid D is placed in a tube furnace, and roasted at 70...

Embodiment 3

[0048] S1. Dissolve 26g of 2-methylimidazole and 6.5g of triethylamine in a beaker filled with 600ml of water, sonicate at room temperature for 2min and stir for 30min to obtain a clear suspension A. Dissolve 8.62 g of cobalt acetate in a beaker containing 200 ml of aqueous solution, and stir at room temperature for 10 min to obtain solution B.

[0049] S2. Add solution B to suspension A at room temperature, stir suspension A with a magnet while adding, stir the obtained mixture at room temperature for 1 h, and then continue stirring at 25 degrees for 12 h to obtain suspension C.

[0050] S3. The upper and lower layers of the suspension C appeared after standing still. The upper layer was a clear solution, and the lower layer was a purple suspension. During this period, it was washed with water and ethanol three times successively, and then dried at a certain temperature in a vacuum oven to obtain solid D.

[0051] S4. The solid D is placed in a tube furnace, and roasted at 8...

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Abstract

The invention relates to a novel Pt-Co / NC catalyst and a preparation method and application thereof. In the Pt-Co / NC catalyst, nitrogen-doped carbon is used as a carrier, metal Co (cobalt) is used asa cocatalyst, and precious metal Pt (platinum) is used as a main catalyst. In a fuel cell, a catalyst in a membrane electrode is easily in contact with a reactant oxygen, and the ORR activity and durability are improved under the synergistic catalytic action of platinum-cobalt. Main active components of the catalyst are Pt and Co, the catalyst is prepared by means of coprecipitation, high-temperature roasting, solvent evaporation and the like, and the preparation method is simple and convenient to operate. According to the Pt-Co / NC catalyst, porous carbon NC obtained after acid etching provides a very good loading surface and pore channels for metal particles, and platinum metal can be uniformly distributed. Nitrogen-doped carbon can activate ORR (oxygen reduction) reaction, indirectly plays a role in replacing rare precious metal platinum, is beneficial to manufacturing low-price fuel cells with low manufacturing environment load, and is more beneficial to promoting global energy distribution and development under the condition of not being controlled by resources.

Description

technical field [0001] The invention relates to the technical field of fuel cell catalysts, in particular to a novel Pt-Co / NC (nitrogen-doped porous carbon) catalyst and its preparation method and application. Background technique [0002] The increasingly serious environmental problems caused by the depletion and irrational use of fossil energy make people have to develop and search for a new type of green energy. Hydrogen energy, as the cleanest and environmentally friendly energy so far, has the advantages of high energy conversion rate and non-toxic and harmless products. At present, the most important way to use it is to use it in fuel cells to convert chemical energy into electrical energy. The energy conversion efficiency is 10%-30%, and the actual energy conversion efficiency of the hydrogen fuel cell can reach 60-80% because it is not limited by the Carnot cycle. [0003] For hydrogen fuel cells, electrodes (coated with platinum / carbon catalysts) and proton exchang...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M4/92
CPCH01M4/8825H01M4/9041H01M4/9083H01M4/921H01M4/926Y02E60/50
Inventor 高继明邓伟林王小鹏沈志杰蒋彪
Owner 广东能创科技有限公司
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