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Non-precious metal catalyst for catalyzing oxygen reduction and preparation method thereof

A non-precious metal and catalyst technology, used in the field of non-precious metal catalysts for catalyzing oxygen reduction and their preparation, can solve the problems of low atomic utilization rate of non-precious metal catalysts, inability to large-scale preparation, poor product consistency, etc., and achieve excellent material transport. transport capacity, excellent oxygen reduction catalytic activity, and excellent electrical conductivity

Active Publication Date: 2020-10-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at one or more of the defects of single-atom type non-noble metal catalysts in the prior art, such as low atom utilization rate, cumbersome synthesis steps, poor product consistency, and incapable of large-scale macro-production, the present invention has been formed

Method used

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  • Non-precious metal catalyst for catalyzing oxygen reduction and preparation method thereof
  • Non-precious metal catalyst for catalyzing oxygen reduction and preparation method thereof
  • Non-precious metal catalyst for catalyzing oxygen reduction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] To 1000g fruit shell activated carbon (purchased from Gongyi Meiyuan Water Purification Material Co., Ltd., the specific surface area is 1200m 2 / g) Pretreatment: In a 1000ml glass beaker, heat and wash the above-mentioned activated carbon with deionized water and 1M hydrochloric acid at about 80°C and soak for 15min, then put it in a vacuum drying oven at 80°C and dry it for later use.

[0072]In a 100ml glass beaker, 300mg of cobalt nitrate (purchased from Sinopharm Reagent Company) and 660mg o-phenanthroline (purchased from Sinopharm Reagent Company) were added to 50ml of ethanol for stirring and mixing to obtain the first mixture.

[0073] In a 100ml glass beaker, add 700mg of the above-mentioned processed fruit shell activated carbon into 50ml of ethanol for ultrasonic (microwave ultrasonic instrument, purchased from Hangzhou Farland Ultrasonic Company) and stirring (magnetic stirrer, purchased from Hefei Kejing Instrument Company) Processing yielded a uniformly di...

Embodiment 2

[0085] According to the method described in Example 1, 1500g fruit shell activated carbon (purchased from Gongyi Meiyuan Water Purification Material Co., Ltd., the specific surface area is 1500m 2 / g) for pretreatment, for subsequent use.

[0086] In a 500ml glass beaker, 600mg of ferric nitrate (purchased from Sinopharm Reagent Company) and 1200mg of 2,2-bipyridyl (purchased from Sinopharm Reagent Company) were added to 100ml of distilled water and stirred to obtain the first mixture.

[0087] In a 500ml glass beaker, 1000mg of the above-mentioned treated shell activated carbon was added to a mixture of 50ml of ethanol and 50ml of water for ultrasonic and stirring treatment to obtain a uniformly dispersed black second mixture.

[0088] In a 1000ml glass beaker, the second mixture was slowly added dropwise to the above first mixture at a rate of 70ml / min, and vigorously stirred (magnetic stirring, 300rpm) for 24h. The stirred and uniformly adsorbed black mixture was vacuum fi...

Embodiment 3

[0092] According to the method described in embodiment 1, to 1500g Super P active carbon (purchased from the special secret company of Switzerland, specific surface area is 1800m 2 / g) for pretreatment, for subsequent use.

[0093] In a 500ml glass beaker, 400mg of ferric nitrate and 800mg of phenanthroline were added into 100ml of acetone for stirring and mixing to obtain the first mixture.

[0094] In a 500ml glass beaker, 1000mg of the above-mentioned treated Super P activated carbon was added into 100ml of acetone for ultrasonic and stirring treatment to obtain a uniformly dispersed second mixture.

[0095] In a 1000ml glass beaker, the second mixture was slowly added dropwise to the above first mixture at a rate of 80ml / min, and vigorously stirred (magnetic stirring, 300rpm) for 24h. The stirred and uniformly adsorbed black mixture was vacuum filtered using a Buchner funnel, rinsed with deionized water, and then placed in a freeze-drying oven (-50°C) for drying. After 24...

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Abstract

The invention relates to a non-noble metal catalyst used for catalytic oxygen reduction and a preparation method thereof. The catalyst has the general formula of Me-N-C. By means of adsorption capability and range-limited calcination of the active carbon, non-noble metal atoms, Me and N which are dispersed to the atomic scale, are adsorbed and limited in the pores in the active carbon C, so that on the basis of high-electro-conductivity of the active carbon, a high-effective oxygen reduction catalyst having single-atom-dispersing capability can be obtained. The non-noble metal catalyst is lowin metal content, can be prepared at low cost and has very large specific surface area, wherein the Me and N are distributed in interior of pores in the active carbon, in a mono-atom dipsersed manner,instead of on the surface of the active carbon, so that excellent mass transfer capability and conductivity are achieved. The catalyst has excellent oxygen reduction catalytic activity, can be applied to preparation of MEA membrane electrodes and cathode catalytic reaction process of large-scale Zn-air batteries, Al-air batteries and fuel cell stacks. The invention provides the high-effective andstable catalyst for the MEA membrane electrode.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to a non-precious metal catalyst for catalyzing oxygen reduction and a preparation method thereof. Background technique [0002] Since the industrial revolution, fossil energy systems represented by petroleum and coal have caused increasingly serious pollution and damage to the natural environment. At the same time, their limited reserves and non-renewable characteristics have also restricted the sustained and rapid development of the economy and society. Therefore, it is of great practical significance to explore and study sustainable energy and its transformation system, so as to realize the effective improvement of the natural environment and the double improvement of energy and resource utilization efficiency while achieving rapid and sustainable economic development. Compared with traditional fuel engines, new energy conversion systems represented by fuel cells (hydrogen-oxyg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M12/08
CPCH01M4/9041H01M4/9083H01M12/08Y02E60/10
Inventor 吴长征周天培张楠谢毅
Owner UNIV OF SCI & TECH OF CHINA
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