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Preparation method for FePt/graphene composite nano-material

A graphene composite, nanomaterial technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of FePt purity that has a great influence, cumbersome process, affecting the catalytic efficiency of fuel cells, etc. Effects that are easy to operate, facilitate application, and synthesize a simple method

Inactive Publication Date: 2014-08-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for synthesizing FePt nanoparticles basically all need to add surfactants, such as commonly used oleic acid oleyl ammonia, etc., but because FePt has a certain solubility in surfactants, this has a great influence on the purity of FePt, and then directly Affects the catalytic efficiency of fuel cells
In addition, the existing methods are all two-step or multi-step synthesis methods, and the process is cumbersome

Method used

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  • Preparation method for FePt/graphene composite nano-material
  • Preparation method for FePt/graphene composite nano-material
  • Preparation method for FePt/graphene composite nano-material

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Experimental program
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Effect test

Embodiment 1

[0030] 1) Add 100 mg of graphite oxide into 100 mL of ethylene glycol, and ultrasonically disperse for 3.5 hours to obtain solution A;

[0031] 2) Add 0.5 mmol of iron acetylacetonate (hereinafter abbreviated as Fe(acac) 3 ) was added to solution A, stirred and dissolved, and then ultrasonicated for 0.5 hours to obtain solution B;

[0032] 3) Add 0.5 mmol of platinum acetylacetonate (hereinafter abbreviated as Pt(acac) 2 ) into 100 mL of ethylene glycol, stirred to dissolve, and obtained solution C;

[0033] 4) Slowly add solution C dropwise to solution B, and sonicate for 0.5 hours to obtain solution D. The concentration of graphite oxide in solution D is 0.5g / L, and the concentrations of iron acetylacetonate and platinum acetylacetonate in solution D are both 2.5 mmol / L;

[0034] 5) Add 1.5 mmol of 1,2-hexadecanediol to solution D, stir to dissolve it, blow nitrogen gas, and reflux reaction at 197°C for 3 hours; the obtained product is alternately centrifuged with water a...

Embodiment 2

[0039] 1) Add 100 mg of graphite oxide into 100 mL of ethylene glycol, and ultrasonically disperse for 3.5 hours to obtain solution A;

[0040] 2) Add 0.1 mmol of Fe(acac) 3 Add to solution A and stir to dissolve, then sonicate for 0.5 hours to obtain solution B;

[0041] 3) Add 0.1 mmol of Pt(acac) 2 Add to 100 mL of ethylene glycol, stir to dissolve, and obtain solution C;

[0042] 4) Slowly add solution C dropwise to solution B, and sonicate for 0.5 hours to obtain solution D. The concentration of graphite oxide in solution D is 0.5g / L, and the concentrations of iron acetylacetonate and platinum acetylacetonate in solution D are both 0.5 mmol / L;

[0043] 5) Add 0.3 mmol of 1,2-hexadecanediol to solution D, stir to dissolve it and pass nitrogen gas, and reflux reaction at 197°C for 3 hours; the obtained product is alternately centrifuged with water and ethanol, and then vacuum-dried at 60°C After 6 hours, the FePt / graphene composite nanomaterial was obtained.

[0044] ...

Embodiment 3

[0048] 1) Add 100 mg of graphite oxide into 100 mL of ethylene glycol, and ultrasonically disperse for 3.5 hours to obtain solution A;

[0049] 2) Add 0.05 mmol of Fe(acac) 3 Add to solution A and stir to dissolve, then sonicate for 0.5 hours to obtain solution B;

[0050] 3) Add 0.05 mmol of Pt(acac) 2 Add in 100 mL of ethylene glycol, stir to dissolve to obtain solution C; slowly add solution C dropwise to solution B, and sonicate for 0.5 hours to obtain solution D, the concentration of graphite oxide in solution D is 0.5g / L , the concentrations of iron acetylacetonate and platinum acetylacetonate in solution D are both 0.25 mmol / L;

[0051] 4) Add 0.15 mmol of 1,2-hexadecanediol to solution D, stir to dissolve it and pass nitrogen gas, reflux reaction at 197°C for 3 hours; the obtained product is washed with water and ethanol alternately by centrifugation, and then vacuum-dried at 60°C After 6 hours, the FePt / graphene composite nanomaterial was obtained.

[0052] Figu...

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Abstract

The invention provides a preparation method of FePt / graphene composite nanomaterial, which comprises the following steps: dispersing graphite oxide in ethylene glycol, ultrasonication, to obtain solution A; adding iron acetylacetonate to solution A, stirring and dissolving, ultrasonication, Obtain solution B; dissolve platinum acetylacetonate in ethylene glycol, stir to dissolve to obtain solution C; add solution C dropwise to solution B, and ultrasonically obtain solution D, and dissolve 1,2-hexadecanediol Add to solution D, the molar ratio of 1,2-hexadecanediol to iron acetylacetonate or platinum acetylacetonate is 3:1, blow nitrogen gas, and reflux reaction at 197°C for 3 hours; the obtained product is centrifugally washed, dried, That is, the FePt / graphene composite nanomaterial is obtained. The present invention adopts the method of co-reduction of iron acetylacetonate, platinum acetylacetonate and graphite oxide in ethylene glycol solution, and synthesizes FePt / graphene material in one step, which eliminates surfactant and improves the purity of the material. Moreover, the one-step synthesis method is simple, easy to operate, and has a good development prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanomaterials, and in particular relates to a preparation method of FePt / graphene composite nanomaterials. Background technique [0002] With the depletion of global energy resources and the sharp deterioration of environmental pollution, the development of environmentally friendly new energy sources other than fossil energy has become an important subject of scientific and industrial research. Due to the advantages of high efficiency, environmental protection, and wide source of fuel, fuel cells have become a hot spot in new energy research. [0003] The noble metal Pt is the most important catalyst in proton exchange membrane fuel cells because of its good catalytic performance. However, due to its high price, its application and promotion are greatly limited. Studies have shown that the introduction of paramagnetic transition metal elements in Pt can not only reduce the cost, but also ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J37/16
Inventor 吴庆知李倩刘熹
Owner WUHAN UNIV OF TECH
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