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Preparation method of platinum-based synergistic catalyst with structure coupling effect

A coupling effect and catalyst technology, applied in the field of electrocatalysis, can solve the problems that the catalytic activity and durability cannot meet the large-scale commercial application of fuel cells, and the cost of cathode platinum carbon oxygen reduction electrocatalyst is high, achieving excellent industrialization prospects, electrocatalysis Excellent catalytic performance, highlighting the effect of simple process

Pending Publication Date: 2022-05-13
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] Aiming at the current development limitations of proton exchange membrane fuel cells and the current high cost of cathode platinum carbon oxygen reduction electrocatalysts, and the catalytic activity and durability can not meet the current situation of large-scale commercial application of fuel cells, the present invention provides a structure Preparation method of platinum-based synergistic catalyst with coupling effect

Method used

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  • Preparation method of platinum-based synergistic catalyst with structure coupling effect
  • Preparation method of platinum-based synergistic catalyst with structure coupling effect
  • Preparation method of platinum-based synergistic catalyst with structure coupling effect

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 3.0 grams of zinc nitrate, 0.1 gram of ferric chloride, and 0.5 gram of sodium acetate were dissolved in 0.3 liters of methanol and ultrasonicated for 10 minutes, then stirred at 500 rpm for 10 minutes to form a uniformly dispersed solution A. Dissolve 8 g of dimethylimidazole in 0.5 liter of methanol, sonicate for 10 minutes and then stir at 500 rpm for 10 minutes to form a uniformly dispersed solution B. Solutions A and B were mixed and stirred at 500 rpm for 12 hours at room temperature. After the stirring, the synthesized product was collected by centrifugation at 9000 rpm, and washed three times with methanol solution at a centrifugation speed of 8000 rpm for 5 minutes. Put the finally obtained precipitate into freeze-drying equipment for 12 hours to freeze-dry, then grind the freeze-dried powder and put it into an alumina crucible, and finally carry out carbonization and pyrolysis at 900°C for 2 hours under the protection of nitrogen gas, and put After carbonizat...

Embodiment 2

[0044] 5.0 grams of polyoxyethylene polyoxypropylene block copolymer, 10.0 grams of dopamine hydrochloride, 2.0 grams of bithiophene and 50.0 milligrams of ammonium molybdate were dissolved in the mixed solution of 2.0 liters of methanol and water (volume ratio 1:1), with 500 It was stirred at rpm for 1 hour, then 50.0 ml of trimethylbenzene was added, and stirring was continued for 1 hour. Finally, 5 ml of ammonia water was added and stirred at 500 rpm for 12 hours. After stirring, the synthesized product was collected by centrifugation at 10,000 rpm for 10 minutes, and washed three times with a mixed solution of water and ethanol at a centrifugation speed of 8,000 rpm for 10 minutes. Put the finally obtained precipitate into freeze-drying equipment for 12 hours to freeze-dry, then grind the freeze-dried powder and put it into an alumina crucible, and finally carry out carbonization and pyrolysis at 900°C for 3 hours under the protection of nitrogen gas, and put After carbon...

Embodiment 3

[0046] Disperse 1.5 grams of polyethylene glycol p-isooctylphenyl ether and 60 mg of nickel nitrate in 1.8 liters of aqueous solution, stir at 500 rpm for 1 hour, then add 24 milliliters of aniline and 15 milliliters of pyrrole, and continue stirring for 1 hour to form Solution A. Dissolve 10 g of ammonium persulfate in 0.2 liter of water, and stir at 500 rpm for 0.5 hour to form solution B. Solution B was slowly added to solution A, and stirred in an ice-water bath at a speed of 300 rpm for 12 hours. After the end, the synthetic product was collected by centrifugation at 8000 rpm for 10 minutes, and washed three times with a mixed solution of water and ethanol (volume ratio 1:1). The centrifugation speed was 8000 rpm and the centrifugation time was 10 minutes. Put the finally obtained precipitate into freeze-drying equipment for 12 hours to freeze-dry, then grind the freeze-dried powder and put it into an alumina crucible, then carry out carbonization and pyrolysis at 800°C ...

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Abstract

The invention belongs to the technical field of electro-catalysis, and particularly relates to a preparation method of a platinum-based synergistic catalyst with a structure coupling effect. A transition metal monatomic catalyst carrier (M-H-C) with mesoporous distribution is formed in the carbonization and pyrolysis process by utilizing the coordination and complexation effect of transition metal salt and a heteroatom-rich carbon precursor; the preparation method comprises the following steps: firstly preparing a platinum monomer or a platinum-based alloy, then realizing nano-particle loading of the platinum monomer or the platinum-based alloy through a mesoporous confinement effect and an M-Hx site adsorption anchoring effect, finally realizing structure and component coupling of mesoporous / monatomic / platinum, and realizing efficient and stable catalysis of an oxygen reduction reaction in a hydrogen-oxygen fuel cell and an alcohol fuel cell. The method has the advantages of low requirement on equipment in the preparation process, short preparation flow, simple operation, prominent catalyst activity and stability, environment-friendly preparation process, and wide industrial application prospect, and is very beneficial to large-scale production.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, in particular to a method for preparing a platinum-based synergistic catalyst with structural coupling effect. Background technique [0002] Among renewable energy sources, hydrogen has become a key object of development and utilization by researchers because of its diverse sources, high driving efficiency, and the discharge during the reaction operation is basically water without any pollution to the environment. . Int. Ed., 2021, 60, 4747-4755). The proton exchange membrane fuel cell, a new type of energy conversion and storage electrochemical sequence facility that can be widely used in transportation, construction, industry, and more efficient energy storage, is a device that generates electrical energy through the chemical reaction of hydrogen with oxygen ( Adv. Mater., 2021, 33, 1908232). [0003] However, the slow oxygen reduction reaction that occurs in the fuel cell cathode ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/926H01M4/8803H01M4/8825
Inventor 王西龙梁汉璞杨晨
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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