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Fe-N doping porous carbon oxygen reduction catalyst

A porous carbon and catalyst technology, applied in the field of redox electrocatalytic materials, can solve the problems of high price, limited application, shortage of resources, etc., and achieve the effects of low price, good methanol resistance and good stability

Inactive Publication Date: 2017-09-15
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the more prominent disadvantages of noble metal catalysts are high price, shortage of resources, and easy agglomeration and corrosion in the electrolyte.
This largely limits its application in fuel cells and limits the rapid development of the fuel cell industry.

Method used

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  • Fe-N doping porous carbon oxygen reduction catalyst
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  • Fe-N doping porous carbon oxygen reduction catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This example relates to a Fe-N doped porous carbon-oxygen reduction catalyst, which is prepared by the following method:

[0042] 1. Preparation of silk fibroin

[0043]1) Accurately weigh 2g Na 2 CO 3 , dissolved in 400mL distilled water, Na 2 CO 3 The solution was heated to 98°C, and then 4 g of shredded cocoons were put into it for refining, twice for 30 minutes each time; the refined cocoon layer was fully washed with distilled water, and dried naturally to obtain silk fibers.

[0044] 2) Weigh 50g CaCl 2 Dissolve the solid in 100 mL of distilled water, heat to 98° C., add the dried silk fibroin fiber in step 2), and heat for 10 min to obtain a translucent thick silk fibroin crude solution.

[0045] 3) pour the thick solution obtained in step 3) into a cellulose dialysis membrane with a molecular composition of 12000-14000, and dialyze in running water for 3 days to obtain a silk fibroin solution, wherein the concentration of silk fibroin is about 4wt% ;

[0...

Embodiment 2

[0052] The experimental procedure is the same as in Example 1, the difference is that during the high-temperature heat treatment, the heating temperature in the tube furnace is controlled to be 700°C, and Fe-N-C-700 is prepared, and the characterization methods (SEM, TEM) are the same as those in Example 1 , electrochemical test method (CV, LSV, i-t) is also the same as embodiment 1.

Embodiment 3

[0054] The experimental procedure is the same as in Example 1, the difference is that during the high-temperature heat treatment, the heating temperature in the tube furnace is controlled to be 900°C to prepare Fe-N-C-900, and the characterization methods (SEM, TEM) are the same as in Example 1 , electrochemical test method (CV, LSV, i-t) is also identical with embodiment 1.

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Abstract

The invention relates to a Fe-N doping porous carbon oxygen reduction catalyst. The Fe-N doping porous carbon oxygen reduction catalyst is prepared by the following steps: after uniformly mixing iron ions and silk fibroin solution, freeze-drying, and performing the high-temperature carbonization treatment to a freeze-dried product. The green and environmental silkworm cocoon in the natural world with the cheap price which is easily and extensively obtained is used as a precursor for successfully synthesizing the high-efficient Fe-N doping porous carbon catalyst for oxygen reduction. Through the optimization of a preparation technology, the suitable reaction conditions can be determined. The prepared catalyst has many advantages, such as the larger electric current density, the higher electron transfer number, the lower hydrogen peroxide yield, the good stability and methyl alcohol poison resistance.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a redox electrocatalytic material with a porous structure. Background technique [0002] Energy is an important material basis for developing the national economy and improving people's living standards, and it is also an important factor that directly affects economic development. Since the beginning of the 21st century, problems such as resource shortage, environmental pollution, and greenhouse effect caused by traditional energy utilization methods have become more prominent. Therefore, traditional energy structures and their utilization methods have become increasingly difficult to meet the needs of human survival and development. In recent years, metal-air batteries have been widely concerned by the scientific and technological circles and the industrial circles, and the industrialization prospects are very bright. As a new type of fuel cell, the metal-air battery is a power genera...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9041H01M4/9091Y02E60/50
Inventor 林雨青李长青何传生孙凤展
Owner CAPITAL NORMAL UNIVERSITY
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