A kind of preparation method of platinum-based/nitrogen-doped carbon quantum dot-carbon nanotube catalyst

A technology of carbon nanotubes and carbon quantum dots, which is applied in the field of preparation of new platinum-based catalyst carriers, can solve problems such as unsatisfactory specific surface area, and achieve the effects of simple and feasible preparation methods, improved activity, and enhanced electrocatalytic activity

Active Publication Date: 2016-10-12
海卓健新能源材料(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they are not ideal in terms of specific surface area, which is lower than that of existing support materials

Method used

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  • A kind of preparation method of platinum-based/nitrogen-doped carbon quantum dot-carbon nanotube catalyst
  • A kind of preparation method of platinum-based/nitrogen-doped carbon quantum dot-carbon nanotube catalyst
  • A kind of preparation method of platinum-based/nitrogen-doped carbon quantum dot-carbon nanotube catalyst

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specific Embodiment approach 1

[0029] Specific embodiment 1: In this embodiment, a platinum-based / nitrogen-doped carbon quantum dot-carbon nanotube catalyst is prepared according to the following steps:

[0030] Weigh 1.0 g of ethylenediaminetetraacetic acid and 20mL of deionized water and mix, ultrasonically disperse for 1 h; weigh 20 mg of carbon nanotubes and mix with ethylenediaminetetraacetic acid solution, and place the mixture in a 50mL Teflon sealed tank In the medium, hydrothermally heated at 140°C for 1 h, washed with deionized water after cooling to room temperature, and dried in vacuum at 80°C to obtain nitrogen-doped carbon quantum dot-carbon nanotube carrier. The platinum-based catalyst is prepared by a microwave-assisted ethylene glycol reduction method.

specific Embodiment approach 2

[0031] Embodiment 2: In this embodiment, a platinum-based / nitrogen-doped carbon quantum dot-carbon nanotube catalyst is prepared according to the following steps:

[0032] Weigh 3.0 g of citric acid, urea (1:1) and 20 mL of deionized water, and disperse ultrasonically for 2 h; weigh 20 mg of carbon nanotubes and mix with the solution, and place the mixture in a 50 mL Teflon sealed tank In the medium, hydrothermally heated at 160 ℃ for 4 h, washed with deionized water after cooling to room temperature, and dried in vacuum at 60 ℃ to obtain nitrogen-doped carbon quantum dot-carbon nanotube carrier. The platinum-based catalyst is prepared by a microwave-assisted ethylene glycol reduction method.

specific Embodiment approach 3

[0033] Specific embodiment 3: In this embodiment, a platinum-based / nitrogen-doped carbon quantum dot-carbon nanotube catalyst is prepared according to the following steps:

[0034] Weigh 2.0 g glucose, glycine (1:1) and 20 mL deionized water, and disperse ultrasonically for 3 h; weigh 20 mg carbon nanotubes and mix with the solution, and place the mixture in a 50 mL Teflon sealed tank , Hydrothermally heated at 180°C for 8 hours, washed with deionized water after cooling to room temperature, and dried in vacuum at 80°C to obtain nitrogen-doped carbon quantum dot-carbon nanotube carrier. The platinum-based catalyst is prepared by a microwave-assisted ethylene glycol reduction method.

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Abstract

The invention discloses a preparation method of a platinum based / nitrogen doped carbon quantum dot-carbon nanotube catalyst. The preparation method comprises the following steps: 1, weighing a certain amount of a carbon source to mix with deionized water, and performing ultrasonic dispersion for 1-3 hours; 2, weighing a certain amount of carbon nanotubes to mix with a solution of the carbon source, thereby obtaining a mixture A; 3, putting the mixture A into a reaction kettle, heating at 140-180 DEG C for 1-12 hours, cooling, washing with deionized water, filtering, and performing vacuum drying to obtain a material B; and 4, preparing a platinum based catalyst by virtue of a microwave assisted ethylene glycol reduction method by taking the material B as a carrier, thereby obtaining the platinum based / nitrogen doped carbon quantum dot-carbon nanotube catalyst. According to the preparation method disclosed by the invention, nitrogen doped carbon quantum dots are used for modifying untreated carbon nanotubes and are compounded with the carbon nanotubes, so that the dispersity of platinum ions in the composite carrier is improved, and then the activity of the catalyst is promoted. The preparation method disclosed by the invention is simple and feasible, promotes the activity of the platinum based catalyst to a greater degree, and is hopeful for commercial application.

Description

Technical field [0001] The invention belongs to the technical field of materials and relates to a method for preparing a novel platinum-based catalyst carrier. Background technique [0002] Direct methanol fuel cell (DMFC) is a green-friendly energy technology with the characteristics of low operating temperature, high energy density, convenient portability and good safety. Among them, the anode catalyst is the core material of DMFC. Therefore, improving the activity and stability of the anode catalyst is the key to its development. [0003] The support material has an important effect on improving the activity and stability of the DMFC electrocatalyst. The first is the impact on catalyst activity. At present, the most widely used carrier is the traditional Vulcan XC-72, but because this carbon material is easy to corrode in the working environment of the fuel cell, the metal particles are prone to agglomeration and migration, resulting in a significant decrease in activity. Sec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24H01M4/90B82Y30/00
CPCY02E60/50
Inventor 王振波张靖佳赵磊李存智张立美顾大明
Owner 海卓健新能源材料(上海)有限公司
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