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Preparation method of platinum based/nitrogen doped carbon quantum dot-carbon nanotube catalyst

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

Active Publication Date: 2015-04-29
海卓健新能源材料(上海)有限公司
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  • Summary
  • 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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  • Preparation method of platinum based/nitrogen doped carbon quantum dot-carbon nanotube catalyst
  • Preparation method of platinum based/nitrogen doped carbon quantum dot-carbon nanotube catalyst
  • Preparation method of platinum based/nitrogen doped carbon quantum dot-carbon nanotube catalyst

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specific Embodiment approach 1

[0029] Specific implementation mode 1: In this implementation mode, platinum-based / nitrogen-doped carbon quantum dot-carbon nanotube catalysts are prepared according to the following steps:

[0030] Weigh 1.0 g of ethylenediaminetetraacetic acid and 20 mL of deionized water and mix them, ultrasonically disperse for 1 h; weigh 20 mg of carbon nanotubes and mix them with ethylenediaminetetraacetic acid solution, and place the mixture in a 50 mL Teflon sealed jar In 140 °C, hydrothermal treatment for 1 h, after cooling to room temperature, washing with deionized water, vacuum drying at 80 °C, to obtain nitrogen-doped carbon quantum dot-carbon nanotube support. The platinum-based catalyst was prepared by microwave-assisted reduction of ethylene glycol.

specific Embodiment approach 2

[0031] Specific embodiment 2: In this embodiment, platinum-based / nitrogen-doped carbon quantum dot-carbon nanotube catalysts are prepared according to the following steps:

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

specific Embodiment approach 3

[0033] Specific embodiment three: In this embodiment, platinum-based / nitrogen-doped carbon quantum dot-carbon nanotube catalysts are prepared according to the following steps:

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

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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 preparation method of a novel platinum-based catalyst carrier. Background technique [0002] Direct methanol fuel cell (DMFC) is a green and friendly energy technology with the characteristics of low operating temperature, high energy density, portability and 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] Support materials have an important impact on improving the activity and stability of DMFC electrocatalysts. The first is the effect on catalyst activity. At present, the most widely used carrier is the traditional Vulcan XC-72, but because this kind of 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. Seco...

Claims

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Application Information

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Patent Type & Authority Applications(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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