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A one-step method for the preparation of platinum nanoparticles-loaded aza three-dimensional graphene aerogels

A graphene airgel and platinum nanotechnology, applied in chemical instruments and methods, electrical components, colloid chemistry, etc., can solve the problems of high price, low emission, slow methanol oxidation reaction, etc., to reduce the amount of platinum metal, effective catalytic effect

Inactive Publication Date: 2018-08-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a green energy, because of its high conversion efficiency and low emissions in terms of energy conversion, it has been widely concerned in power vehicles and portable electronic products; precious metals such as platinum are currently widely used Catalyst, but its application is limited due to its high price; at the same time, the oxidation reaction of methanol is slow and the traditional methods of preparing micro / nano-structured 3D graphene (such as chemical vapor deposition method, silicon template method, etc.), the processing process is cumbersome , and expensive
These series of factors have greatly limited the practical application of methanol fuel cells.

Method used

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  • A one-step method for the preparation of platinum nanoparticles-loaded aza three-dimensional graphene aerogels
  • A one-step method for the preparation of platinum nanoparticles-loaded aza three-dimensional graphene aerogels
  • A one-step method for the preparation of platinum nanoparticles-loaded aza three-dimensional graphene aerogels

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Preparation of graphene oxide (GO)

[0035] First, natural flake graphite powder and potassium nitrate are added to concentrated sulfuric acid in a mass ratio (2:1) and cooled to about 0°C. The amount of concentrated sulfuric acid is added according to the ratio of natural flake graphite powder: concentrated sulfuric acid = 1.0 (g): 50.0 (mL) Secondly, the amount of potassium permanganate is added according to the mass ratio of natural flake graphite powder: potassium permanganate = 6 The reaction system was reacted for 3-4 hours (in an ice bath at 0°C); after that, in a water bath at 30°C for 1 hour, the reactant was muddy; then the above reactant was stirred in an ice-water bath for 5 minutes, and then double distilled water was added 100mL; then stirred at 70°C for 3 hours, the reactant was brownish-yellow mud; finally, 300mL hydrogen peroxide (5%) was added slowly and then quickly to the reaction system to react for 5-30min. Then 500mL of concentrated hydrochlor...

Embodiment 2

[0042] 1) Preparation of graphene oxide (GO)

[0043]First, natural flake graphite powder and potassium nitrate are added to concentrated sulfuric acid in a mass ratio (2:1) and cooled to about 0°C. The amount of concentrated sulfuric acid is added according to the ratio of natural flake graphite powder: concentrated sulfuric acid = 1.0 (g): 50.0 (mL) Secondly, the amount of potassium permanganate is added according to the mass ratio of natural flake graphite powder: potassium permanganate = 6 The reaction system was reacted for 3-4 hours (in an ice bath at 0°C); after that, in a water bath at 30°C for 1 hour, the reactant was muddy; then the above reactant was stirred in an ice-water bath for 5 minutes, and then double distilled water was added 100mL; then stirred at 70°C for 3 hours, the reactant was brownish-yellow mud; finally, 300mL hydrogen peroxide (5%) was added slowly and then quickly to the reaction system to react for 5-30min. Then 500mL of concentrated hydrochlori...

Embodiment 3

[0050] 1) Preparation of graphene oxide (GO)

[0051] First, natural flake graphite powder and potassium nitrate are added to concentrated sulfuric acid in a mass ratio (2:1) and cooled to about 0°C. The amount of concentrated sulfuric acid is added according to the ratio of natural flake graphite powder: concentrated sulfuric acid = 1.0 (g): 50.0 (mL) Secondly, the amount of potassium permanganate is added according to the mass ratio of natural flake graphite powder: potassium permanganate = 6 The reaction system was reacted for 3-4 hours (in an ice bath at 0°C; then in a water bath at 30°C for 1 hour, and the reactant was muddy; then the above reactant was stirred in an ice-water bath for 5 minutes, and then 100 mL of twice distilled water was added ; Then stirred at 70°C for 3 hours, the reactant was brownish-yellow mud; finally, 300mL hydrogen peroxide (5%) was added slowly and then quickly to the reaction system to react for 5-30min. After that, 500mL concentrated hydroch...

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Abstract

The invention belongs to the field of preparation of electrochemical functional nano materials and particularly relates to a method for preparing platinum supported nitrogen-doped three-dimensional graphene aerogel via a one-step hydrothermal method. The method comprises the following steps: modifying natural flake graphite powder to form oxidized graphene; and then, with oxidized graphene as a basis material and chloroplatinic acid and glycine as raw materials, preparing the platinum nano particle supported nitrogen-doped three-dimensional graphene aerogel via the one-step hydrothermal method through covalent bonding, and performing effective methanol catalytic reaction. With introduction of nitrogen atoms, the performance of the composite material is improved greatly. The platinum nano particle supported nitrogen-doped three-dimensional graphene aerogel composite material is excellent in catalytic performance and stability.

Description

technical field [0001] The invention relates to a simple and effective method for preparing platinum nanoparticle-loaded aza three-dimensional graphene airgel, which belongs to the field of preparation of electrochemical functional nanomaterials. Background technique [0002] In recent years, due to the excellent properties of graphene, its family of nano-based materials has been widely used, especially in the fields of transistors, solar cells, sensors, supercapacitors and catalyst supports. However, due to their layer-to-layer interactions, agglomeration often occurs, thus greatly compromising their performance. To overcome this shortcoming, it is necessary to develop a simple method for synthesizing graphene-based materials. [0003] The three-dimensional structure of graphene not only maintains the excellent characteristics of graphene, but also its cross-linked porous structure makes it have larger void volume, specific surface area, good corrosion resistance and high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00H01M4/88H01M4/92
CPCB01J13/00H01M4/88H01M4/926Y02E60/50
Inventor 王坤张玄郝楠陈赛博钱静刘倩
Owner JIANGSU UNIV
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