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Preparation method of cationic polymer functionalized graphene-loaded platinum nanocomposite

A cationic polymer, platinum nanotechnology, used in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, nanotechnology, etc., can solve the difficulties and limitations of platinum nanoparticles, and achieve easy control of the reaction. , the effect of low cost and high load rate

Inactive Publication Date: 2014-01-01
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, people are paying more and more attention to using graphene as a carrier of catalytic materials. Hung HuaJie et al. (Graphene nanoplate-Pt composite as a high performance electrocatalyst for direct methanol fuel cells. J Power Sources 2012;204:46-52) successfully Platinum nanoparticles are supported on graphene, and this platinum / graphene composite material has good catalytic performance and can be well applied in methanol fuel cells, but the surface content of graphene oxide obtained due to excessive oxidation Oxygen groups are also reduced while preparing metal nanoparticles, so that the graphene surface becomes inert and smooth like graphite. Therefore, it is very important to directly obtain platinum nanoparticles with higher density and more stable loading on the graphene surface. Difficult, so currently used as a carrier for nanoparticles is also limited

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  • Preparation method of cationic polymer functionalized graphene-loaded platinum nanocomposite
  • Preparation method of cationic polymer functionalized graphene-loaded platinum nanocomposite
  • Preparation method of cationic polymer functionalized graphene-loaded platinum nanocomposite

Examples

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example 1

[0020] (1) According to the mass ratio of dimethyl diallyl ammonium chloride, graphene and solvent is 0.5:15:1000, respectively weigh 5 mg of dimethyl diallyl ammonium chloride, 150 mg of graphene and volume ratio Be 10g of 1: 1 polyethylene glycol / ethylene glycol mixed solution, add dropwise polyethylene glycol / ethylene glycol mixed solution in dimethyl diallyl ammonium chloride and graphene, mix under ultrasonic again 0.5 h to mix evenly, then the mixture was stirred at room temperature for 24 h, then suction filtered, washed with twice distilled water, and finally vacuum-dried at 40°C for 4 h to obtain surface-functionalized graphene.

[0021] (2) Weigh chloroplatinic acid and place it in a polyethylene glycol / ethylene glycol mixed solution with a volume ratio of 1: 1 for ultrasonic dispersion. After dispersion, the proportion of chloroplatinic acid in the whole mixed solution: (polyethylene glycol) Ethylene glycol / ethylene glycol)=0.05:100 (g / mL) to obtain a yellow chlorop...

example 2

[0025](1) According to the mass ratio of dimethyl diallyl ammonium chloride, graphene and solvent is 1:15:1500, weigh 10 mg of dimethyl diallyl ammonium chloride, graphene 150 mg and volume ratio respectively Be 2: 1 polyethylene glycol / ethylene glycol mixed solution 15g, add dropwise polyethylene glycol / ethylene glycol mixed solution in dimethyl diallyl ammonium chloride and graphene, mix 0.5 under ultrasonic again h to mix evenly, then the mixture was stirred at room temperature for 24 h, then suction filtered, washed with twice distilled water, and finally vacuum-dried at 40°C for 6 h to obtain surface functionalized graphene.

[0026] (2) Weigh chloroplatinic acid and place it in a polyethylene glycol / ethylene glycol mixture with a volume ratio of 2: 1 for ultrasonic dispersion. After dispersion, the proportion of chloroplatinic acid in the whole mixed solution: (polyethylene glycol) Ethylene glycol / ethylene glycol)=0.06:100 (g / mL) to obtain a yellow chloroplatinic acid so...

example 3

[0030] (1) According to the mass ratio of dimethyl diallyl ammonium chloride, graphene and solvent is 1.5:16:1500, weigh 15 mg of dimethyl diallyl ammonium chloride, 160 mg of graphene and volume ratio respectively Be 3: 1 polyethylene glycol / ethylene glycol mixed solution 15g, add dropwise polyethylene glycol / ethylene glycol mixed solution in dimethyl diallyl ammonium chloride and graphene, mix 0.5 under ultrasonic again h to mix evenly, then the mixture was stirred at room temperature for 24 h, then suction filtered, washed with twice distilled water, and finally vacuum-dried at 40°C for 8 h to obtain surface-functionalized graphene.

[0031] (2) Weigh chloroplatinic acid and place it in a polyethylene glycol / ethylene glycol mixed solution with a volume ratio of 3: 1 for ultrasonic dispersion. After dispersion, the proportion of chloroplatinic acid in the whole mixed solution: (polyethylene glycol) Ethylene glycol / ethylene glycol)=0.07:100 (g / mL) to obtain a yellow chloropla...

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Abstract

The invention belongs to the technical field of catalysts, and provides a preparation method of a cationic polymer functionalized graphene-loaded platinum nanocomposite. The preparation method comprises the following steps: preparing cationic polymer functionalized grapheme; and taking a halogen-containing acid of a precious metal as a metal source, taking a mixed solvent of polyethylene glycol and ethylene glycol as a stabilizer, a reducing agent and a solvent, adjusting the pH of a system by using sodium hydroxide, adding chloroplatinic acid and surface-functionalized graphene in a mass ratio of (1-5): 20, and reacting for 3-6min in a microwave oven at 140 DEG C to obtain a functionalized grapheme-loaded monodisperse platinum nanocomposite catalyst by one step. The functionalized grapheme-loaded monodisperse platinum nanocomposite catalyst prepared with the method has good stability, high load rate and dispersion of metal particles, and high electrocatalytic activity; and the preparation method is low in cost, nontoxic, and simple in process, and has low requirements on equipment; and with the preparation method, the large-scale production can be easily carried out.

Description

technical field [0001] The invention relates to a preparation method of a cationic polymer functionalized graphene-supported platinum nanocomposite, which belongs to the technical field of catalysts. technical background [0002] As a new type of energy device, low-temperature fuel cell has many advantages such as high fuel utilization efficiency and no pollution. At present, the active ingredient of catalysts used in low-temperature fuel cells is still mainly platinum. Platinum's limited resources, high cost, and easy to be poisoned have greatly restricted the commercialization of low-temperature fuel cells. It is particularly important to develop new electrocatalysts, reduce the amount of noble metals and improve the performance of electrocatalysts. The carrier affects the dispersion of precious metals, the transmission of materials, the anti-poisoning performance and stability of the catalyst, especially the catalytic effect of the carrier on the noble metal greatly af...

Claims

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Application Information

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IPC IPC(8): B01J31/06B82Y30/00
Inventor 章明美谢吉民孙倩闫早学陈敏荆俊杰
Owner JIANGSU UNIV
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