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Nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst and preparation method thereof

A technology of nitrogen-doped graphene and electrocatalyst, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., and can solve the effects of nitrogen-doped graphene properties, High production cost, complex process and other problems, to achieve the effect of improved electrocatalytic activity, high utilization rate and simple process

Inactive Publication Date: 2013-11-27
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the multi-step method are not only the complicated process and high production cost, but also the subsequent processing has certain influence on the properties of nitrogen-doped graphene.

Method used

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  • Nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst and preparation method thereof
  • Nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst and preparation method thereof
  • Nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A nitrogen-doped graphene-supported PtRu alloy nano-electrocatalyst and a preparation method thereof. The PtRu in the nitrogen-doped graphene-supported PtRu alloy nano-electrocatalyst is 15-30 wt%, the nitrogen-doped graphene is 70-85 wt%, and the particle size of the PtRu alloy is 0.5-4.5 nm.

[0032] The doping amount of nitrogen in the nitrogen-doped graphene is 4-10 wt%.

[0033] In the PtRu alloy: the amount ratio of Pt to Ru is 1:3~1:1.

[0034] The preparation method of nitrogen-doped graphene-supported PtRu alloy nano electrocatalyst described in this embodiment is:

[0035] (1) Stir the graphene oxide solution, ethylene glycol and N-methylpyrrolidone evenly, and ultrasonically disperse for 1-3 hours to obtain a homogeneously dispersed suspension.

[0036] Wherein the mass ratio of graphene oxide, ethylene glycol and N-methylpyrrolidone is graphene oxide: ethylene glycol: N-methylpyrrolidone is 30~45: 1100~2000: 1000~1600.

[0037] (2) Add RuCl to the homodis...

Embodiment 2

[0041] A nitrogen-doped graphene-supported PtRu alloy nano-electrocatalyst and a preparation method thereof. The PtRu in the nitrogen-doped graphene-supported PtRu alloy nano electrocatalyst is 5-20 wt%, the nitrogen-doped graphene is 80-95 wt%, and the particle size of the PtRu alloy is 0.5-4.5 nm.

[0042] The doping amount of nitrogen in the nitrogen-doped graphene is 1-6 wt%.

[0043] In the PtRu alloy: the ratio of the amount of substance of Pt to Ru is 1:1~3:1.

[0044] The preparation method of nitrogen-doped graphene-supported PtRu alloy nano electrocatalyst described in this embodiment is:

[0045] (1) Stir the graphene oxide solution, ethylene glycol and N-methylpyrrolidone evenly, and ultrasonically disperse for 1-3 hours to obtain a homogeneously dispersed suspension.

[0046] Wherein the mass ratio of graphene oxide, ethylene glycol and N-methylpyrrolidone is graphene oxide: ethylene glycol: N-methylpyrrolidone is 45~60: 1800~2800: 500~1200.

[0047] (2) Add Ru...

Embodiment 3

[0051] A nitrogen-doped graphene-supported PtCo alloy nano-electrocatalyst and a preparation method thereof. The PtCo in the nitrogen-doped graphene-supported PtCo alloy nano electrocatalyst is 15-30 wt%, the nitrogen-doped graphene is 70-85 wt%, and the particle size of the PtCo alloy is 0.5-4.5 nm.

[0052] The nitrogen doping amount in the nitrogen-doped graphene is 4-10 wt%.

[0053] In the PtCo alloy: the ratio of the amount of Pt to Co is 1:3~1:1.

[0054] The preparation method of nitrogen-doped graphene-supported PtCo alloy nano electrocatalyst described in this embodiment is:

[0055] (1) Stir the graphene oxide solution, ethylene glycol and N-methylpyrrolidone evenly, and ultrasonically disperse for 1-3 hours to obtain a homogeneously dispersed suspension.

[0056] Wherein the mass ratio of graphene oxide, ethylene glycol and N-methylpyrrolidone is graphene oxide: ethylene glycol:: N-methylpyrrolidone is 30~45: 1100~2000: 1000~1600.

[0057] (2) Add CoCl to the ho...

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Abstract

The invention relates to a nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: uniformly stirring graphene oxide, ethanediol and N-methylpyrrolidone in a mass ratio of (30 to 60): (1100 to 2800): (500 to 1600), and performing an ultrasonic dispersion treatment, so as to obtain a uniformly-dispersed suspension liquid; adding a metal salt solution and an H2PtCl6.6H2O solution in the uniformly-dispersed suspension liquid, uniformly stirring, and performing an ultrasonic dispersion treatment, so as to obtain a precursor; heating the precursor to 90-180 DEG C in an oil bath in a stirring condition, insulating heat, and performing condensation reflux for 1 to 5 hours, so as to obtain a black turbid liquid; performing vacuum suction filtration on the black turbid liquid, sequentially washing by acetone, distilled water and absolute ethyl alcohol, and performing vacuum drying at a room temperature to obtain the nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst. The preparation method disclosed by the invention is simple in process and low in energy consumption; the prepared nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst is high in catalytic activity, good in stability, uniform in the dispersion of nanometre particles, and controllable in the particle size of the nanometre particles.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a nitrogen-doped graphene-supported Pt-based alloy nanometer electrocatalyst and a preparation method thereof. Background technique [0002] With the increasing depletion of energy, the energy issue has become a hot issue in the world today. As a new power generation device different from traditional energy storage batteries, fuel cells have become an important way to solve energy problems. Direct methanol fuel cells using methanol as fuel not only have the advantages of simple structure, low pollution, low operating temperature, and high energy conversion efficiency, but also because methanol has high energy density, high chemical activity, cheap price, abundant sources, and is easy to carry and store. It is suitable as a portable power source and an electric locomotive power source, so it has broad application prospects. [0003] The anode catalyst rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B01J23/89B01J23/46B82Y30/00
CPCY02E60/50
Inventor 周盈科徐晓袁涛李亚伟刘江波
Owner WUHAN UNIV OF SCI & TECH
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