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Fuel cell catalyst using graphene/fullerene three-dimensional composite material as carrier and preparation and application thereof

A composite material, fuel cell technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve problems such as less research, and achieve high catalytic activity, excellent performance, and good catalyst performance.

Inactive Publication Date: 2017-09-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The carbon materials generally used as catalyst supports mainly include conductive carbon black, carbon nanotubes and graphene, but there are few studies on composite nanocarbon materials, especially the use of fullerene materials.

Method used

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  • Fuel cell catalyst using graphene/fullerene three-dimensional composite material as carrier and preparation and application thereof
  • Fuel cell catalyst using graphene/fullerene three-dimensional composite material as carrier and preparation and application thereof
  • Fuel cell catalyst using graphene/fullerene three-dimensional composite material as carrier and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Synthesis of fullerene pyrrolidine derivatives.

[0036] In a 100ml round-bottomed flask, add 72mg of C60, 36mg of p-nitrobenzaldehyde, 180mg of sarcosine and 45ml of toluene, reflux at 115°C for 14 hours under nitrogen protection, cool and filter, and use a vacuum rotary evaporator for the filtrate After concentration, it was purified by silica gel column chromatography, and the eluent was toluene / ethanol (10:1). The obtained product was characterized by MALDI-TOF-MS, and a series of mass spectrum peaks were observed at molecular weights of 834-1119, corresponding to 2-7 pyrrolidinyl substituents respectively.

Embodiment 2

[0038] Preparation of three-dimensional self-assembled structures of graphene oxide-fullerene.

[0039] Mix 20ml of graphene oxide aqueous solution (0.5mg / ml) with 10ml of ethanol solution of fullerene pyrrolidine derivatives (0.5mg / ml) by ultrasonication for 5 minutes, and let stand for 4 hours; centrifuge the formed precipitate and then water Ultrasonic dispersion, drop directly on a clean silicon wafer, and observe with a S-4800 scanning electron microscope, the three-dimensional self-assembled structure of graphene oxide-fullerene ( figure 1 a).

Embodiment 3

[0041] Preparation of graphene-fullerene three-dimensional composite supported palladium catalyst.

[0042] Ultrasonically disperse 20mg of graphene oxide-fullerene three-dimensional composite material in 20ml of water, add 2ml of palladium chloride aqueous solution (2mg / ml) and ultrasonic for 30 minutes, transfer to a hydrothermal reaction kettle, add 80μl of hydrazine hydrate The reaction was carried out at 95°C for 4 hours. After cooling and centrifuging, the precipitate was washed three times with distilled water, and then placed in a vacuum drying oven at 40-50° C. for 24 hours to obtain a graphene-fullerene three-dimensional composite supported palladium catalyst. Characterized by TEM, it can be seen that the catalyst nanoparticles are uniformly dispersed on the surface of the graphene-fullerene three-dimensional composite ( figure 1 b).

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Abstract

The invention relates to a fuel cell catalyst using a graphene / fullerene three-dimensional composite material as a carrier and preparation and application thereof. Under the protection of nitrogen, fullerene C60, sarcosine and paraformaldehyde are subjected to reflux reaction in methylbenzene to synthesize a fulleropyrrolidine derivative; ethanol solution of the synthesized fulleropyrrolidine derivative and aqueous solution of graphene oxide are subjected to mixing, standing and self-assembling to prepare a graphene oxide and fullerene three-dimensional self-assembly structure; and graphene oxide and metal ions are simultaneously reduced by utilizing hydrazine hydrate so as to obtain the catalyst using the graphene / fullerene three-dimensional composite material as the carrier. When performance of the prepared catalyst for carrying out catalysis and oxidation on methanol is tested by an electrochemical cyclic voltammetric method, obvious improvement on performance of the catalyst prepared by the invention is found. According to the invention, preparation is simple, rapid and convenient to operate; and the prepared catalyst is low in cost and good in catalytic performance and has potential application prospect in a direct methanol fuel cell.

Description

technical field [0001] The invention belongs to the field of fuel cell catalyst materials and their preparation and application, in particular to a fuel cell catalyst with a three-dimensional graphene-fullerene composite material as a carrier and its preparation and application. Background technique [0002] Fuel cells, represented by direct methanol fuel cells (DMFC), are a clean energy source that has developed rapidly in recent years, but the practical promotion and use of DMFCs still face severe challenges, among which poor catalyst performance and high cost are two important limiting factors . Loading metal catalysts on the surface of carbon materials is an effective method to improve the catalytic performance and reduce the cost of catalysts. [0003] Carbon materials generally used as catalyst supports mainly include conductive carbon black, carbon nanotubes and graphene, but there are few studies on composite nanocarbon materials, especially the use of fullerene mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88H01M8/1011
CPCH01M4/88H01M4/926H01M8/1011Y02E60/50
Inventor 张煊张佳伟
Owner DONGHUA UNIV
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