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Iron and nitrogen doped non-noble metal catalyst as well as preparation method and application thereof

A non-precious metal and catalyst technology, applied in the field of non-precious metal catalysts and oxygen reduction catalytic reactions, can solve the problems of large-scale commercial production limitations, expensive prices, limited content, etc., and achieve the effect of aerobic reduction performance

Inactive Publication Date: 2014-02-26
重庆奥珀瑞森科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although platinum-based catalysts are currently the best and most widely used cathode catalysts, their large-scale commercial production has been greatly hindered due to their limited content, high price, and poor stability. limit

Method used

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  • Iron and nitrogen doped non-noble metal catalyst as well as preparation method and application thereof
  • Iron and nitrogen doped non-noble metal catalyst as well as preparation method and application thereof
  • Iron and nitrogen doped non-noble metal catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 1000g of sucrose, 250g of 6-benzyl adenine, FeCl 3 50g, mixed thoroughly, added to 20ml of concentrated sulfuric acid, oxidized and carbonized at room temperature for 14 days, washed, dried, and ball milled with a ball mill; finally, in a tube furnace, under nitrogen protection, graphitized at 600°C for 2 hours to obtain chlorinated Iron-activated nitrogen-containing purine cathode catalyst.

[0019] Through the oxygen reduction test, it was found that on the nitrogen-containing purine cathode catalyst electrode activated by ferric chloride under acidic conditions, the onset potential and half-wave potential of the oxygen reduction reaction were positively shifted by 487mV and 293mV respectively; The onset potential and half-wave potential of the reaction shifted positively by 220 mV and 56 mV, respectively.

Embodiment 2

[0021] Weigh 1250g of sucrose, 250g of 6-benzyl adenine, FeCl 3 50g, mixed thoroughly, added to 20ml of concentrated sulfuric acid, oxidized and carbonized at room temperature for 14 days, washed, dried, and ball milled with a ball mill; finally, in a tube furnace, under nitrogen protection, graphitized at 700°C for 1 hour to obtain chlorinated Iron-activated nitrogen-containing purine cathode catalyst.

[0022] Through the oxygen reduction test, it was found that on the nitrogen-containing purine cathode catalyst electrode activated by ferric chloride under acidic conditions, the onset potential and half-wave potential of the oxygen reduction reaction were positively shifted by 466mV and 287mV respectively; The onset potential and half-wave potential of the reaction shifted positively by 215 mV and 52 mV, respectively.

Embodiment 3

[0024] Weigh 1000g of sucrose, 250g of 6-benzyl adenine, FeCl 3 50g, mixed thoroughly, added to 20ml of concentrated sulfuric acid, oxidized and carbonized at room temperature for 14 days, washed, dried, and ball milled with a ball mill; finally, in a tube furnace, under nitrogen protection, graphitized at 800°C for 2 hours to obtain chlorinated Iron-activated nitrogen-containing purine cathode catalyst.

[0025] Through the oxygen reduction test, it was found that on the nitrogen-containing purine cathode catalyst electrode activated by ferric chloride under acidic conditions, the onset potential and half-wave potential of the oxygen reduction reaction were positively shifted by 550mV and 388mV respectively; The onset potential and half-wave potential of the reaction shifted positively by 242 mV and 71 mV, respectively.

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Abstract

The invention provides an iron and nitrogen doped non-noble metal catalyst, and belongs to the technical field of new materials. The non-noble metal catalyst is obtained by using saccharose as a carbon source, 6-benzyladenine as a nitrogen source and ferric chloride as an activating agent through carbonization treatment, wherein the nitrogen content of the non-noble metal catalyst is 5.3-8.4%. The oxygen reduction tests find that compared with conventional commercial XC-72 carbon powder, the iron and nitrogen doped non-noble metal catalyst has better oxygen reduction performance. Therefore, the iron and nitrogen doped non-noble metal catalyst can serve as a cathode catalyst material to be applied to the oxygen reduction catalytic reduction of fuel cells.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a non-precious metal catalyst doped with iron and nitrogen, which is mainly used in the oxygen reduction catalytic reaction of a fuel cell. Background technique [0002] As an environmentally friendly energy utilization technology, fuel cells have shown broad application prospects in electric vehicle power supplies, mobile power supplies, micro power supplies and small power generation devices. The cathodic oxygen reduction reaction in fuel cells is undoubtedly a strong fulcrum for each fuel cell, because oxygen reduction, as a kinetically slow process, dominates the performance of fuel cell energy storage and conversion systems. Although platinum-based catalysts are currently the best and most widely used cathode catalysts, their large-scale commercial production has been greatly hindered due to their limited content, high price, and poor stability. limit. Therefore, the d...

Claims

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Application Information

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IPC IPC(8): B01J23/745H01M4/90
CPCY02E60/50
Inventor 王荣方杨慧娟王辉冯汉青季山
Owner 重庆奥珀瑞森科技有限公司
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