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Preparation of a flower-like porous carbon material composite for fuel cell catalysis

A technology of porous carbon materials and fuel cells, applied in nanotechnology for materials and surface science, battery electrodes, circuits, etc., can solve few problems such as porous carbon materials

Inactive Publication Date: 2016-08-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used carbon material catalyst supports are mostly tubular and spherical, such as carbon nanotubes, carbon nanohorns, mesoporous carbons, ordered porous carbons, etc., but there are few three-dimensional multi-layered porous carbon materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of copper oxide template

[0022] Weigh 0.5-1 g of anhydrous copper nitrate and 1-2 g of anhydrous sodium citrate into a beaker, and add 40-80 mL of ultrapure water to dissolve them. Add 0.6 g of sodium hydroxide to the above solution under magnetic stirring, and continue stirring at room temperature for 1 h, at which point a cloudy solution is obtained. The above solution was placed in a 100 mL polytetrafluoroethylene autoclave and heated at 150 °C for 6 h. After the reaction was completed, the autoclave was taken out, cooled to room temperature, and the precipitate was taken out, centrifuged several times, washed with ultrapure water, and dried at 60 °C for 12 h. After drying, the white powder obtained was flower-shaped copper oxide.

[0023] (2) Preparation of flower-like porous carbon materials

[0024] Weigh 0.5–1 g of flower-shaped copper oxide and 0.1–0.2 g of asphalt into a beaker, add 50–100 mL of toluene, and stir magnetically for 6 h. The m...

Embodiment 2

[0029] The preparation steps are the same as in Example 1, except that the carbon source in step (2) is vaseline, the organic solvent is tetrahydrofuran, and the acid is nitric acid. The precursors of noble metals used in step (3) were 1-2 mL each of chloroauric acid and chloropalladium acid.

Embodiment 3

[0031] The preparation steps are the same as in Example 1, except that the carbon source in step (2) is carbon ink, the organic solvent is carbon tetrachloride, and the acid is sulfuric acid. The precursors of noble metals used in step (3) were 1-2 mL each of chloroauric acid, chloroplatinic acid, and chloropalladium acid.

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Abstract

The invention relates to the field of preparation of inorganic nanomaterials and particularly relates to a preparation method of a flower-like porous carbon material composite applied to a fuel cell catalyst. The preparation method comprises the following steps of firstly, uniformly mixing flower-like copper oxide serving as a template with a carbon source in an organic solvent; removing the organic solvent by virtue of a spin evaporation method; transferring the residual solid into a tubular furnace and burning to obtain a mixed flower-like material; dissolving the mixed flower-like material in an acid to obtain a flower-like carbon material; mixing the flower-like carbon material with KOH and burning to obtain a flower-like porous carbon material; mixing the flower-like porous carbon material with a noble metal precursor and reacting in the presence of sodium borohydride serving as a reducing agent to obtain the fuel cell catalyst. Since the carbon material prepared by the invention has relatively large surface area, the active components are effectively dispersed, the usage of the noble metal is reduced and the catalytic activity of the catalyst is improved.

Description

technical field [0001] The invention relates to the field of preparation of inorganic nanometer materials, in particular to the preparation of a flower-shaped porous carbon material composite applied to fuel cell catalysis. Background technique [0002] Fuel cell is an efficient and clean power generation system that directly and continuously converts chemical energy into electrical energy. It is the fourth power generation system after hydropower, thermal power and nuclear power. Direct liquid fuel cell is an electrochemical reaction device that directly supplies liquid fuel, such as methanol, formic acid, ethanol, and ethylene glycol, to the fuel cell without fuel reforming, and converts chemical energy into electrical energy for power generation. [0003] At present, there are great obstacles to the commercialization of fuel cells, mainly because fuel cells generally use expensive noble metal catalysts. In order to further improve the catalytic activity of the catalyst a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K7/24C08K3/04C01B31/02H01M4/96B82Y30/00B82Y40/00
CPCB82Y40/00H01M4/9083Y02E60/50
Inventor 于京华吴开庆张彦马超孙国强吴鲁丹李丽刘海云颜梅葛慎光
Owner UNIV OF JINAN