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

A technology of ferroferric oxide and composites, 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, small specific surface area, etc., and achieve good results Activity and stability, promotion of catalytic oxidation, effect of large specific surface area

Inactive Publication Date: 2011-06-15
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) Add 2 g of ferric chloride and 5.1 g of ferrous chloride into three times distilled water, pass through nitrogen, add ammonia water at 60 °C to make the pH of the solution = 12, and raise the temperature to 80 °C under the protection of nitrogen to react for 1 h , cooling, washing, vacuum drying for 8 h and then grinding to obtain nano-ferric oxide.

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

[0037] (3) Heat treatment of ferric oxide-carbon nitrogen composite...

Embodiment 2

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

[0043] (1) Add 2.3 g of ferric chloride and 5.8 g of ferrous chloride into three times distilled water, blow in nitrogen, add ammonia water at 60 °C to make the pH of the solution = 11, raise the temperature to 60 °C under nitrogen protection and keep for 3 h , cooling, washing, vacuum drying for 10 h and then grinding to obtain nanometer ferric oxide.

[0044] (2) Add 0.23 g of nanometer iron ferric oxide into triple distilled water, ultrasonically stir to make it fully dispersed, add 0.26 g of pyrrole monomer, and 2.4 g of surfactant octadecyltrimethylammonium bromide in sequence , and then slowly dropwise added the oxidizing agent ferric chloride solution (mass concentration: 25%, containing 0.55 g of oxidizing agent), and reacted at a temperature of 3 °C for 2 hours. After the reaction was completed, suction filtered, washed, and dried at 60 °C to obtain four Ferric oxide-carbon nitrogen complex precursor.

[0045] (3) The...

Embodiment 3

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

[0051] (1) Add 3 g of ferric chloride and 6.8 g of ferrous chloride into three times distilled water, pass through nitrogen, add ammonia water at 85 °C to make the pH value of the solution = 9, raise the temperature to 75 °C under nitrogen protection and keep for 3 h, cooling, washing, vacuum drying for 8 h, and grinding to obtain nano-ferric oxide.

[0052] (2) Add 0.26 g of nanometer iron ferric oxide into triple distilled water, ultrasonically and stir to make it fully dispersed; add 0.3 g of pyrrole monomer, 2.7 g of surfactant ammonium oleate in sequence, and then slowly add the oxidant dropwise over Ammonium sulfate (mass concentration: 25%, containing 0.72 g oxidant), reacted at 0 °C for 5 hours; after the reaction was completed, suction filtered, washed, dried at 50 °C, ferric oxide-carbon nitrogen composite precursor.

[0053] (3) The ferroferric oxide-carbon-nitrogen composite precursor was heat-treated at 650 °C for ...

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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 Applications(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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