Preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles

A graphene-based, nanoparticle technology, applied in the field of materials science, can solve the problems of low catalytic activity and high catalyst price, and achieve the effects of simple preparation process and high economic value

Active Publication Date: 2016-05-18
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a preparation method of heteroatom-doped graphene-based material-loaded noble metal nanoparticles, the heteroa

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  • Preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles
  • Preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles
  • Preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles

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[0024] Example 1

[0025] A Pd / B, N-G, boron-nitrogen-doped graphene-supported palladium nano-particle material containing Pd, C, B, N, H and O elements.

[0026] The above-mentioned preparation method of boron nitrogen doped graphene-supported palladium nanoparticle material specifically includes the following steps:

[0027] (1) Preparation of graphene

[0028] Graphene oxide is obtained from graphite flakes through an improved oxidation method. Add 1-3g graphite flakes to 1-5g potassium persulfate and 1-5g phosphorus pentoxide, then add 100-200ml concentrated sulfuric acid (98%), oxidize at a high temperature of 50-100℃, and then use 1-10g potassium permanganate is oxidized, and graphene is obtained after multiple centrifugal cleaning.

[0029] (2) Heteroatom doped graphene materials

[0030] After 20-40mg of graphene is ultrasonically treated, add 1-100g of the heteroatom precursor of boric acid and urea with a mass ratio of 1:1, and perform B and N co-doping in a hydrothermal ket...

Example Embodiment

[0042] Example 2

[0043] A nitrogen-doped graphene-supported platinum nanoparticle material Pt / N-G containing Pt, C, N, H and O elements.

[0044] The method for preparing the nitrogen-doped graphene-supported platinum nanoparticle material specifically includes the following steps:

[0045] (1) Graphene preparation

[0046] Graphene oxide is obtained from graphite flakes through an improved oxidation method. Add 1-3g graphite flakes to 1-5g potassium persulfate and 1-5g phosphorus pentoxide, then add 100-200ml concentrated sulfuric acid, oxidize at a high temperature of 50-100℃, and then use 1-10g high Potassium manganate is oxidized, and graphene is obtained after multiple centrifugal cleaning.

[0047] (2) Preparation of nitrogen-doped graphene

[0048] After 20-40 mg of graphene-based material is ultrasonically processed, 1-10 g of urea heteroatom precursor is added, and N doping is performed in a hydrothermal kettle at a high temperature of 150-200° C. to obtain nitrogen-doped g...

Example Embodiment

[0051] Example 3

[0052] A Pt / P, N-G, phosphorus-nitrogen-doped graphene-supported platinum nano-particle material contains Pt, C, P, N, H and O elements.

[0053] The method for preparing the above-mentioned phosphorus-nitrogen-doped graphene-supported platinum nanoparticle material specifically includes the following steps:

[0054] (1) Preparation of graphene

[0055] Graphene oxide is obtained from graphite flakes through an improved oxidation method. Add 1-3g graphite flakes to 1-5g potassium persulfate and 1-5g phosphorus pentoxide, then add 100-200ml concentrated sulfuric acid (98%), oxidize at a high temperature of 50-100℃, and then use 1-10g potassium permanganate is oxidized, and graphene is obtained after multiple centrifugal cleaning.

[0056] (2) Preparation of phosphorus and nitrogen doped graphene

[0057] After 20-40mg of graphene is ultrasonically treated, add the heteroatom precursor of sodium hypophosphite and urea with a mass ratio of 1:1, and do P and N co-doping...

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Abstract

The invention provides a preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles. The preparation method comprises steps as follows: preparation of a heteroatom doped graphene-based material: a graphene-based material is subjected to ultrasonic treatment, a heteroatom precursor is added, heteroatom doping is performed in a hydrothermal kettle at the temperature of 150-200 DEG C, and the heteroatom doped graphene-based material is obtained; preparation of the heteroatom doped graphene-based material supported noble metal nanoparticles: the heteroatom doped graphene-based material is dissolved in deionized water and subjected to ultrasonic treatment, a stabilizer and a metal precursor are added, metal in the metal precursor is platinum, palladium, gold or silver, the mixture is continuously stirred, pH is adjusted to range from 8 to 14, a reduction agent is added, the mixture is continuously stirred, and the heteroatom doped graphene-based material supported noble metal nanoparticles are obtained after vacuum drying. The synergistic effect of the heteroatom and the carrier on noble metal is used, the activity and the stability of a catalyst are effectively improved, and a preparation process is simple and suitable for industrial production and has higher economic value.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a fuel cell anode catalyst material, in particular to a preparation method of a heteroatom-doped graphene-based material loaded with noble metal nanoparticles. Background technique [0002] With the continuous development of the current era, direct alcohol fuel cells have become a suitable substitute for resource and energy crisis power generation due to their advantages such as high energy density and non-polluting products. As we all know, electrocatalyst is the core of fuel cells, which is also the key to limit the commercialization of fuel cells. The catalysts of direct alcohol fuel cells are mainly noble metals, but noble metals are expensive, have low reserves and are easily poisoned by the reaction intermediate CO. In this way, noble metals are usually combined with carbon-based materials, such as activated carbon, carbon spheres, mesoporous carbon, carbon nanotubes, grap...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8817H01M4/8825H01M4/926Y02E60/50
Inventor 徐群杰刘其林艳吴桐范金辰蔡文斌
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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