Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nitrogen-doped carbon-supported non-precious metal (m-n-c) oxygen reduction catalyst and preparation method thereof

A non-precious metal, nitrogen-doped carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve unfavorable catalyst industrialization, difficult control of preparation process conditions, and complex catalyst preparation methods and other problems, to achieve excellent stability and methanol resistance, good ORR catalytic activity, and facilitate the effect of diffusion transfer

Inactive Publication Date: 2017-05-24
XIANGTAN UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the above-mentioned catalyst preparation methods are relatively complicated, and the process conditions in the preparation process are not easy to control, which is not conducive to the industrialization of catalysts.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nitrogen-doped carbon-supported non-precious metal (m-n-c) oxygen reduction catalyst and preparation method thereof
  • Nitrogen-doped carbon-supported non-precious metal (m-n-c) oxygen reduction catalyst and preparation method thereof
  • Nitrogen-doped carbon-supported non-precious metal (m-n-c) oxygen reduction catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0054] Synthesis of tripyrrole-[1,3,5]-triazine (TPT):

[0055] Add 6.78g (0.10mol) of pyrrole and 80mL of anhydrous tetrahydrofuran into a 250mL single-necked round-bottomed flask, add KOH (8.86g, 0.15mol) into the above system under ice-cooling, rise to room temperature for 3 hours, and divide Add 5.59g (0.03mol) of cyanuric chloride in batches, and continue stirring at room temperature for 18h. After the reaction was completed, the reaction system was poured into a 250mL ice-water bath to settle, filtered, washed with deionized water three times (200mL×3), and then dried in a vacuum oven at 80°C for 24h. The obtained crude product was recrystallized with 15 mL of acetone and ethanol mixed solvent (acetone: ethanol ratio of 4:1), filtered, washed with ethanol, and the obtained off-white solid was vacuum-dried at room temperature to constant weight, 4.64 g, yield 56%, melting point: 210 ° C .

Embodiment 1

[0057] (1) Synthesis (P(TPT+Py)): Dissolve 55g (0.2mol) tripyrrole-[1,3,5]-triazine (TPT), 40.6g (0.6mol) pyrrole (Py) in 2000mL nitric acid Add 18.26g (0.24mol) of dimethoxymethane and 32.28g (0.24mol) of anhydrous aluminum trichloride to benzene, stir at 45°C for 5h, then rise to 80°C and stir for 19h; after the reaction is complete, pour Sediment in 10L methanol, filter, wash with water (1000mL×2), and dry for later use; the infrared spectrum of polymer P (TPT+Py) is as follows figure 1 shown;

[0058] The partial structure (i.e. repeating unit) of the polymer is as follows:

[0059]

[0060] (2) Add 2.5g (P(TPT+Py)) and 0.7g ferric trichloride to 300mL ethanol, ultrasonically disperse the whole system for 180min, evaporate the ethanol to dryness, and dry in a vacuum oven at 80°C 4h;

[0061] (3) Gained 3.2g powdery solid in N 2 Heat treatment at 800°C for 1 h in the atmosphere to obtain 0.9 g of nitrogen-doped carbon material;

[0062] (4) The obtained nitrogen-dop...

Embodiment 2

[0071] (1) Synthesis (P(TPT+Py)): Dissolve 55g (0.2mol) tripyrrole-[1,3,5]-triazine (TPT), 40.6g (0.6mol) pyrrole (Py) in 2000mL nitric acid Add 24g (0.24mol) dichloroethane and 32.28g (0.24mol) anhydrous aluminum trichloride to benzene, stir at 45°C for 5h, then rise to 80°C and stir for 19h; after the reaction is complete, pour 10L methanol Settled in medium, filtered, washed with water (1000mL×2), and dried for later use; the infrared spectrum of polymer P (TPT+Py) is as follows figure 1 shown;

[0072] (2) Add 2.5g (P(TPT+Py)) and 0.7g ferric trichloride to 300mL ethanol, ultrasonically disperse the whole system for 180min, evaporate the ethanol to dryness, and dry in a vacuum oven at 80°C 4h, obtain primary mixture;

[0073] (3) Gained 3.2g powdery solid in N 2 Heat treatment at 800°C for 1 hour in the atmosphere to obtain 0.91g of nitrogen-doped carbon material;

[0074] (4) The obtained nitrogen-doped carbon material was washed with 2000mL 0.5M dilute sulfuric acid ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an M-N-C oxygen reduction catalyst and a preparation method thereof, wherein the raw materials of the catalyst comprise a copolymer (P(TPT+Py)) of tripyrrole-[1,3,5]-triazine (TPT) and pyrrole (Py) and a non-noble metal salt. The preparation method comprises: (1) using a Friedel-Crafts reaction to synthesize a copolymer (P(TPT+Py)) of tripyrrole-[1,3,5]-triazine (TPT) and pyrrole (Py); (2) adding (P(TPT+Py)) and a non-noble metal salt to ethanol, placing into an ultrasonic dispersion device, carrying out an ultrasonic treatment to make the whole system be uniformly dispersed, evaporating the ethanol, placing into a vacuum oven, and drying for 4 h at a temperature of 80 DEG C; (3) carrying out a first heat treatment to obtain a nitrogen-doped carbon material; (4) completely washing the obtained nitrogen-doped carbon material with a diluted acid; and (5) carrying out a second heat treatment so as to obtain the M-N-C oxygen reduction catalyst.

Description

technical field [0001] The invention relates to an oxygen reduction catalyst and a preparation method thereof, specifically an M-N-C oxygen reduction catalyst and a preparation method thereof, belonging to the field of fuel cell science and technology. Background technique [0002] Oxygen reduction reaction (ORR) is one of the most important electrocatalytic reactions and is a very critical process in devices such as fuel cells and metal-air batteries. Platinum and platinum-based catalysts are currently the most active and most commonly used ORR catalysts, but they are expensive, limited resources, and poor stability in long-term operation, which seriously hinder the development of fuel cells and other related fields. Therefore, the research and development of non-precious metal catalysts with high activity and high stability is of great significance for reducing the cost of fuel cells and accelerating their commercialization. [0003] It is undoubtedly promising to replace...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24H01M4/90
CPCY02E60/50
Inventor 夏珺黎华明阳梅陈红飙高勇
Owner XIANGTAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com