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Preparation method and application of nitrogen-doped carbon supported metal nanoparticles electrocatalyst with uniform particle size for alkaline hydroxidation reaction

A metal nanoparticle, hydrogen oxidation reaction technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problem of using environmentally unfriendly, DMF toxic species and environment, organic reagents or surfaces The problem of high synthesis cost of active agent is achieved, and the effect of low synthesis cost, easy large-scale production, and simple and easy preparation process is achieved

Inactive Publication Date: 2018-12-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, DMF is highly toxic and potentially threatening to species and the environment (Li Fan, Wang Shuo, Wang Yan, Wang Yizhi, Beijing University of Technology, application number: 201610590014.2)
In addition, there have been no patent reports that nitrogen-doped carbon-supported metal nanoparticle electrocatalysts with uniform particle size are suitable for the anode hydrogen oxidation reaction of alkaline fuel cells.
[0006] In summary, the synthesis methods of alkaline hydrogen oxidation electrocatalysts in reported articles or nitrogen-doped carbon-supported nano-metal catalysts in reported patents often require the use of environmentally unfriendly organic reagents or surfactants or relatively low synthesis costs. high

Method used

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  • Preparation method and application of nitrogen-doped carbon supported metal nanoparticles electrocatalyst with uniform particle size for alkaline hydroxidation reaction
  • Preparation method and application of nitrogen-doped carbon supported metal nanoparticles electrocatalyst with uniform particle size for alkaline hydroxidation reaction
  • Preparation method and application of nitrogen-doped carbon supported metal nanoparticles electrocatalyst with uniform particle size for alkaline hydroxidation reaction

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Experimental program
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Embodiment 1

[0046] (1) Preparation of nitrogen-doped carbon support

[0047] Activated carbon (1.0g) and 2,2'-bipyridine (0.5g) were dispersed in ethanol (30ml), ultrasonicated for 40min; at 85°C, the ethanol reagent was evaporated with stirring to obtain a black mixture; dried in a vacuum oven, After grinding, carbonization was carried out at 1000° C. for 1 h in an argon atmosphere to finally obtain a nitrogen-doped carbon support.

[0048] (2) Preparation of nitrogen-doped carbon-supported PdIr nanoparticles with uniform particle size electrocatalyst

[0049] Disperse the nitrogen-doped carbon carrier (160 mg) in an aqueous solution (20 ml), and sonicate for 40 min; place the suspension obtained above in a water bath, and add potassium chloropalladate (20 mM, 6.6 ml) and three Iridium chloride (20mM, 6.6ml) was stirred and adsorbed at constant temperature for 2h; then, the temperature was lowered to 10°C, and ascorbic acid solution (150mM, 20ml) was added and stirred at constant temper...

Embodiment 2

[0056] (1) Preparation of nitrogen-doped carbon support

[0057] Activated carbon (1.0g) and 2,2'-bipyridine (1.0g) were dispersed in ethanol (30ml), ultrasonicated for 40min; at 85°C, the ethanol reagent was evaporated with stirring to obtain a black mixture; dried in a vacuum oven, After grinding, carbonization was carried out at 600° C. for 1 h in an argon atmosphere to finally obtain a nitrogen-doped carbon support.

[0058] (2) Preparation of nitrogen-doped carbon-supported PtRu nanoparticle electrocatalyst with uniform particle size

[0059] Disperse the nitrogen-doped carbon carrier (160mg) in an aqueous solution (20ml) and ultrasonicate for 40min; place the suspension obtained above in a water bath, add chloroplatinic acid (20mM, 6.6ml) and ruthenium chloride at 25°C (20mM, 6.6ml) was stirred and adsorbed at constant temperature for 2h; then, lowered the temperature to 10°C, added ascorbic acid solution (150mM, 20ml) and stirred at constant temperature for 0.5h; filte...

Embodiment 3

[0065] (1) Preparation of nitrogen-doped carbon support

[0066] Activated carbon (1.0g) and 2,2'-bipyridine (0.5g) were dispersed in ethanol (30ml), ultrasonicated for 40min; at 85°C, the ethanol reagent was evaporated with stirring to obtain a black mixture; dried in a vacuum oven, After grinding, carbonization was carried out at 600° C. for 1 h in an argon atmosphere to finally obtain a nitrogen-doped carbon support.

[0067] (2) Preparation of nitrogen-doped carbon-supported Pd nanoparticle electrocatalyst with uniform particle size

[0068] Disperse the nitrogen-doped carbon carrier (160mg) in the aqueous solution (20ml) and ultrasonicate for 40min; place the suspension obtained above in a water bath, add potassium chloropalladate (20mM, 18.8ml) at constant temperature and stir at 40°C Adsorption for 2h; then, lower the temperature to 10°C, add ascorbic acid solution (150mM, 20ml) and stir at constant temperature for 0.5h; suction filter, wash, and dry to obtain a black ...

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Abstract

The invention belongs to the technical field of metal electrocatalysts, and provides a preparation method and application of a nitrogen-doped carbon-supported metal nano-particle electrocatalyst withuniform particle size for alkaline hydroxidation reaction. The nitrogen-containing ligand and the carbon material are used as the nitrogen source and the carbon source, the nitrogen-doped carbon carrier contains more metal nanoparticle attachment sites is simply and quickly prepared through carbonization. As the metal salt is adsorbed in advance and the reduction temperature of the metal salt is controlled, the purpose of control the reduction rate of the metal salt is achieved, and the metal nanoparticles are uniformly dispersed on the carrier. A surfactant is not used in the invention, and the reagent used is safe and harmless. The preparation process of the invention is simple and easy, the synthesis cost is low, and the large-scale production is easy. The supported highly dispersed nano-electrocatalyst prepared by the invention has high electrocatalytic activity and is suitable for alkaline fuel cell anodic hydrogenation reaction.

Description

technical field [0001] The invention belongs to the technical field of metal electrocatalysts, and relates to a preparation method and an application of a nitrogen-doped carbon-supported metal nanoparticle electrocatalyst with uniform particle size for alkaline hydrogen oxidation reaction. Background technique [0002] Fuel cells efficiently provide clean electricity, do not emit carbon dioxide, hydrocarbons, nitrogen oxides, sulfur oxides, and haze-causing particulate matter, and only emit clean water. They are widely considered to be the preferred new chemical power sources in the 21st century. For alkaline fuel cells, the cathode undergoes an oxygen reduction reaction (1 / 2O 2 +H 2 O+2e - →2OH - ), the resulting OH - Passed through the anion exchange membrane to the anode side. On the anode side fuel H 2 Complete the hydrogen oxidation reaction (H 2 +2OH - →2H 2 O+2e - ) to obtain electrical energy. Due to its alkaline environment, alkaline fuel cells have the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B82Y30/00
CPCB82Y30/00H01M4/921H01M4/926Y02E60/50
Inventor 宋玉江丛媛媛吕洋
Owner DALIAN UNIV OF TECH
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