Preparation method for base metal oxygen reduction catalyst

A non-precious metal and catalyst technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve problems such as far-reaching gaps, and achieve improved oxygen reduction catalytic performance , low cost, and the effect of improving the catalytic performance of oxygen reduction

Inactive Publication Date: 2012-08-01
EAST CHINA UNIV OF SCI & TECH +1
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Problems solved by technology

[0008] However, the oxygen reduction catalytic performance of Co-PPy / C catalysts is still far from the practical requirements, and its activity still needs to be further improved.

Method used

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  • Preparation method for base metal oxygen reduction catalyst
  • Preparation method for base metal oxygen reduction catalyst
  • Preparation method for base metal oxygen reduction catalyst

Examples

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Embodiment 1

[0023] Weigh 8g carbon black BP2000, and 400ml, 6M HNO 3 The solution is mixed and refluxed at 100°C for 8 hours. The mixed solution is filtered under reduced pressure, washed with deionized water to neutrality, dried in vacuum at 45°C for 12 hours, ground, and passed through a 200-mesh sieve to obtain concentrated acid treatment. Carbon carrier.

[0024] Weigh 0.6g of carbon black powder treated with nitric acid, put it into an Erlenmeyer flask, add 100ml of isopropanol (IPA), ultrasonically disperse for 30min, add 3mmol of freshly steamed pyrrole (because pyrrole is easily oxidized, it needs to be Re-evaporate under reduced pressure at 120℃) and 100ml deionized water, magnetically stirred for 30min, and then add 100ml of 0.06M ferric chloride solution as oxidant and 0.1902g p-toluenesulfonic acid (TsOH) as dopant, at room temperature After 4 hours of magnetic stirring, the mixed solution was filtered under reduced pressure, and washed with anhydrous ethanol and deionized water ...

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Abstract

The invention discloses a preparation method for a base metal oxygen reduction catalyst. The preparation method includes following steps: weighing a defined amount of carbon dust treated by concentrated nitric acid; adding newly steamed pyrrole, oxidizing agent (ferric chloride) and doping agent (para-toluenesulfonic acid) in the carbon dust; decompressing and filtering mixed solution after uniformly stirring; then drying in a vacuum manner for a few of hours; weighing a defined amount of cobalt salt to be mixed with the mixed solution; decompressing and evaporating after uniformly stirring; and calcinating dried powder at a high temperature so as to obtain the base metal oxygen reduction catalyst with good electrochemical performances. The cheap and environment-friendly ferric chloride is used as the oxidizing agent, the base metal catalyst with the excellent oxygen reduction performance is prepared, the maximum peak potential of an oxygen reduction process catalyzed by the catalyst reaches 0.686V, and the maximum electron transfer number reaches 3.84.

Description

Technical field [0001] The invention relates to a catalyst, which is a non-noble metal oxygen reduction catalyst, which is mainly used in a proton exchange membrane fuel cell. Background technique [0002] Energy is the cornerstone of the development of the national economy and the progress of social civilization. Without the development of the energy industry, there would be no economic growth and social progress. Therefore, the sustainable development of energy is an important guarantee for the sustainable development of human society; In order to use energy more effectively, we have been making unremitting efforts. [0003] The proton exchange membrane fuel cell is a power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy through an electrochemical reaction without burning. It is precisely because of its high efficiency and clean characteristics that proton exchange membrane fuel cells have adapted to the requirements of sus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06
Inventor 胡欣欣原鲜霞马紫峰王幸宜
Owner EAST CHINA UNIV OF SCI & TECH
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