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A kind of hierarchical porous carbon material for fuel cell and its preparation and application

A porous carbon material, hierarchical porous technology, applied to nitrogen co-doped ordered hierarchical porous materials, fuel cell cathode catalysts, iron, fluorine fields, can solve the problem of catalytic activity difference, to achieve high oxygen reduction catalytic activity , Simplify the preparation steps and improve the stability of the material

Active Publication Date: 2018-11-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the researchers found that the heteroatom-doped carbon materials show large differences in catalytic activity according to their specific surface and pore structure.

Method used

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  • A kind of hierarchical porous carbon material for fuel cell and its preparation and application
  • A kind of hierarchical porous carbon material for fuel cell and its preparation and application
  • A kind of hierarchical porous carbon material for fuel cell and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of phenolic resin prepolymer:

[0035] Melt 2g of phenol at 50°C, add 0.5g of 20wt.% NaOH aqueous solution and stir for 10min, drop in 3.5g of 37wt.% formaldehyde aqueous solution and continue stirring for 10min, slowly raise the temperature to 75°C for 30min, cool down to room temperature, and adjust with dilute HCl solution The pH value of the solution is 7.0, distill under reduced pressure at 45°C for 1-4 hours to reduce the water content in the viscous liquid as much as possible, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir evenly for 12 hours overnight, and centrifuge the precipitated sodium chloride Separation and removal, and finally prepared a soluble phenolic resin prepolymer ethanol solution (0.3g.mL -1 )stand-by.

[0036] (2) Preparation of ordered hierarchical porous carbon materials co-doped with iron, fluorine and nitrogen

[0037] Dissolve 0.8g of F127 in 20g of ethanol, stir until clear and transparent, th...

Embodiment 2

[0040] (1) Preparation of phenolic resin prepolymer:

[0041] Melt 2g of phenol at 50°C, add 0.5g of 20wt.% NaOH aqueous solution and stir for 10min, drop in 3.5g of 37wt.% formaldehyde aqueous solution and continue stirring for 10min, slowly raise the temperature to 75°C for 30min, cool down to room temperature, and adjust with dilute HCl solution The pH value of the solution is 7.0, distill under reduced pressure at 45°C for 1-4 hours to reduce the water content in the viscous liquid as much as possible, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir evenly for 12 hours overnight, and centrifuge the precipitated sodium chloride Separation and removal, and finally prepared a soluble phenolic resin prepolymer ethanol solution (0.3g.mL -1 )stand-by.

[0042] (2) Preparation of ordered hierarchical porous carbon materials co-doped with iron, fluorine and nitrogen

[0043] Dissolve 1.6g of F127 in 20g of ethanol, stir until clear and transparent, th...

Embodiment 3

[0046] (1) Preparation of phenolic resin prepolymer:

[0047] Melt 2.2g resorcinol at 50°C, add 0.5g 20wt.% NaOH aqueous solution and stir for 10min, drop in 3.5g 37wt.% formaldehyde aqueous solution and continue stirring for 10min, slowly raise the temperature to 75°C for 30min, cool down to room temperature, Use dilute HCl solution to adjust the pH value of the solution to 7.0, distill under reduced pressure at 45°C for 1-4 hours to reduce the water content in the viscous liquid as much as possible, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir evenly for 12 hours overnight, and precipitate The sodium chloride was removed by centrifugation, and finally the ethanol solution of soluble phenolic resin prepolymer (0.3g.mL -1 )stand-by.

[0048] (2) Preparation of ordered hierarchical porous carbon materials co-doped with iron, fluorine and nitrogen

[0049] Dissolve 2.1g of P123 in 20g of ethanol, stir until clear and transparent, then add 4g of p...

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Abstract

The invention relates to a hierarchical porous carbon material for a fuel cell cathode catalyst. The porous carbon material is an ordered hierarchical porous material of transition metal-nitrogen-fluorine / carbon, which is made through a solvent volatilization-induced self-assembly process, and has a specific surface area of 500‑1200m2.g‑1, the total pore volume is 0.5‑2㎝3.g‑1, the mesopore volume accounts for 30‑70% of the total pore volume, the transition metal atom content is 0.1‑1wt%, the nitrogen atom content 1-5wt%, fluorine atom content is 0.1-0.5wt%. The gold-iron, fluorine, and nitrogen co-doped ordered hierarchical porous carbon material exhibits excellent oxygen reduction catalytic performance and good stability. The carbon material of the invention has the advantages of excellent preparation performance, simple process, good process repeatability, low cost and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an iron, fluorine and nitrogen co-doped ordered hierarchical porous material and its application on fuel cell cathode catalysts. Background technique [0002] Energy is the foundation of social civilization progress and national economic development. In recent years, with the progress of social economy, people's demand for energy is increasing day by day. At the same time, due to the extensive use of fossil energy, a large amount of nitrogen oxides and sulfur oxides are produced, making environmental problems increasingly serious. The traditional energy structure dominated by fossil fuels such as coal, oil, and natural gas can no longer meet the needs of contemporary society for an efficient, clean, and economical new energy system, and energy development is facing unprecedented challenges. [0003] Due to the advantages of fast response, high energy conversion efficiency, hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88H01M4/96
CPCY02E60/50
Inventor 张华民邓呈维钟和香柳丝丝姚岚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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