Ferroferric oxide-carbon and nitrogen composite and preparation and application thereof

A technology of triiron tetroxide and complexes, which is applied in chemical instruments and methods, chemical/physical processes, catalyst carriers, etc., can solve the problems of easy falling off of catalyst active particles, low catalytic activity, and small specific surface area. Activity and stability, promoting catalytic oxidation, the effect of large specific surface area

Inactive Publication Date: 2013-01-09
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the most commonly used catalyst carrier is carbon powder, which has many disadvantages: the force between metal particles and C is weak, and the catalytic activity in the catalyst is low , The specific surface area is small, the catalyst active particles are easy to fall off, etc.

Method used

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  • Ferroferric oxide-carbon and nitrogen composite and preparation and application thereof
  • Ferroferric oxide-carbon and nitrogen composite and preparation and application thereof
  • Ferroferric oxide-carbon and nitrogen composite and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] a. Fe 3 O 4 -CN x Vector preparation

[0035] (1) 2 g of ferric chloride and 5.1 g of ferrous chloride were added to tertiary distilled water, nitrogen was introduced, ammonia water was added at 60 °C to make the pH of the solution = 12, and the temperature was raised to 80 °C for 1 h under nitrogen protection. , cooled, washed, dried under vacuum for 8 h and ground to obtain nano-iron tetroxide.

[0036] (2) Add 0.2 g of nano ferric tetroxide into tertiary distilled water, ultrasonically and stir to make it fully dispersed; add 0.2 g of pyrrole monomer and 2.2 g of surfactant sodium lauryl sulfate to it, and then slowly drop Add oxidant ferric chloride solution (20 % mass concentration, 0.44g containing oxidant), react at 5 ℃ for 2 hours; after the reaction is completed, suction filter, wash, and dry at 50 ℃ to obtain ferric oxide- Carbon Nitrogen Complex Precursors.

[0037] (3) Heat treatment of the ferric oxide-carbon and nitrogen composite precursor at a temp...

Embodiment 2

[0042] a. Fe 3 O 4 -CN x Vector preparation

[0043] (1) 2.3 g of ferric chloride and 5.8 g of ferrous chloride were added to the three-distilled water, nitrogen was introduced, ammonia water was added at 60 °C to make the pH of the solution = 11, and the temperature was raised to 60 °C for 3 h under nitrogen protection. , cooled, washed, dried in vacuum for 10 h and ground to obtain nano-iron tetroxide.

[0044] (2) Add 0.23 g of nano ferric tetroxide into tertiary distilled water, ultrasonically and stir to make it fully dispersed, and add 0.26 g of pyrrole monomer and 2.4 g of surfactant octadecyltrimethylammonium bromide in turn. , and then slowly dropwise add the oxidant ferric chloride solution (the mass concentration is 25%, containing 0.55 g of oxidant), and react at a temperature of 3 °C for 2 hours. After the reaction is completed, suction filtration, wash, and dry at 60 °C. Ferric oxide-carbon-nitrogen complex precursor.

[0045] (3) Heat treatment of the ferr...

Embodiment 3

[0050] a. Fe 3 O 4 -CN x Vector preparation

[0051] (1) 3 g of ferric chloride and 6.8 g of ferrous chloride were added to the tertiary distilled water, nitrogen was introduced, ammonia water was added at 85 °C to make the pH value of the solution = 9, and the temperature was raised to 75 °C under nitrogen protection and maintained for 3 h, cooled, washed, vacuum-dried for 8 h and ground to obtain nano-iron tetroxide.

[0052] (2) Add 0.26 g of nano ferric tetroxide into tertiary distilled water, ultrasonicate and stir to make it fully dispersed; add 0.3 g of pyrrole monomer and 2.7 g of surfactant ammonium oleate in turn, and then slowly add oxidizing agent dropwise to it. Ammonium sulfate (25 % mass concentration, 0.72 g oxidant) was reacted at 0 °C for 5 hours; after the reaction was completed, suction filtration, washing, and drying at 50 °C temperature, ferric tetroxide-carbon-nitrogen complex precursor.

[0053] (3) Heat treatment of the ferric oxide-carbon and nit...

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Abstract

The invention provides a high-performance ferroferric oxide-carbon and nitrogen composite, and belongs to the technical field of composite materials. The composite is prepared by uniformly doping nano ferroferric oxide in a polypyrrole matrix. Because the composite has high activity and large specific surface area, and N atoms doped on the surface can immobilize active grains of a catalyst, and afuel cell catalyst prepared from the composite serving as a carrier has synergism with nanoparticles loaded on the catalyst to promote electrode catalysis reaction so as to improve the catalysis performance of the catalyst. Compared with the traditional catalyst prepared from a C carrier, the fuel cell catalyst has better catalysis performance and higher stability.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a ferric oxide-carbon nitrogen compound and a preparation method thereof; the invention also relates to the application of the compound as a catalyst carrier in preparing fuel cell catalysts. Background technique [0002] In order to solve the energy crisis and environmental pollution, energy issues and related technologies have received great attention. As an environmentally friendly energy utilization technology, fuel cells can directly convert chemical energy into electrical energy. People have been keen to apply it to various aspects such as automobiles and power stations. In recent years, despite the rapid development of polymer fuel cells, there are still many technical bottlenecks to be solved for large-scale commercial application. One of the important bottlenecks is that platinum-based catalysts are the mainstream catalysts for fuel cell electrodes, and high-p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J27/24H01M4/88H01M4/90
CPCY02E60/50
Inventor 雷自强王伟贾晶春李旭升王荣方王辉
Owner NORTHWEST NORMAL UNIVERSITY
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