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Preparation method of carbon carrying cobalt prophyrin oxygen reduction catalyst

A carbon-supported cobalt porphyrin oxygen and catalyst technology, which is applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of general catalyst performance, long time, complicated process, etc., shorten the preparation time, improve Activity, the effect of simplifying the reaction process

Inactive Publication Date: 2006-08-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

See literature [1] and [2], this preparation method takes a long time, the process is complicated, consumes a lot of manpower and material resources, and the catalyst performance obtained is average

Method used

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  • Preparation method of carbon carrying cobalt prophyrin oxygen reduction catalyst
  • Preparation method of carbon carrying cobalt prophyrin oxygen reduction catalyst
  • Preparation method of carbon carrying cobalt prophyrin oxygen reduction catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: (1) carry out high-energy ball milling after the VulcanXC-72R carbon black of 5g Cabot Company is fully dried, then with 100ml 6M HNO 3 Reflux at 60° C. for 4 hours for pretreatment, wash and dry in a vacuum oven at 110° C. to obtain 4.9 g of pretreated carbon black.

[0020] (2) Put 0.25g of tetramethylphenylporphyrin (TPP), 0.1755g of cobalt acetate and 0.5g of pretreated carbon black in 25ml of glacial acetic acid, mix them uniformly in ultrasonic for 15min, and then place In a microwave oven with a condensing tube, reflux at a power of 130W for 90min, cool down, add 30ml of methanol to precipitate, stand still, filter, wash with methanol until the filtrate is colorless, and dry the filter cake in a vacuum oven at 60°C for 12h to obtain 0.71g of catalyst Precursor.

[0021] (3) 0.2g of the catalyst precursor was heat-treated at 900°C for 2h under the protection of argon, cooled naturally, and ground to obtain 0.195g of carbon-supported cobalt porphyrin...

Embodiment 2

[0023] Embodiment 2: (1) carry out high-energy ball milling after the Black Pearl2000 carbon black of 5g Cabot company is fully dried, then with 30wt%H 2 o 2 Soak at room temperature for 4 hours for pretreatment, after washing, put it into a vacuum oven and dry at 110° C. to obtain 4.8 g of pretreated carbon black.

[0024] (2) Add 0.25g of tetramethoxyphenylporphyrin (TMPP), 0.1755g of cobalt acetate and 0.5g of pretreated carbon black to 25ml of glacial acetic acid, mix uniformly in ultrasonic for 15min, and then place in a In the microwave oven of the reflux condenser, the reaction was refluxed for 150 minutes with a power of 130W. Cool, add 30ml of methanol to precipitate, let stand, filter, wash with methanol until the filtrate is colorless, and dry the filter cake in a vacuum oven at 60°C for 12h to obtain 0.72g of catalyst precursor.

[0025] (3) 0.2g of the catalyst precursor was heat-treated at 900°C for 2h under argon protection, cooled naturally, and ground to obt...

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Abstract

The present invention discloses a preparation method of cobalt porphyrin on carbon oxidation-reduction catalyst. Said method includes the following several steps: firstly, fully drying carbon black, high-energy ball grinding, then using 30 wt% of H2O2 or 6M HNO3 to make pretreatment; adding porphyrin monomer, cobalt acetate and pretreated carbon black into glacial acetic acid, uniformly mixing them, then placing them into a microwave reactor with reflux condensing device, heating to make reaction to obtain catalyst precursor body, then under the protection of argon heat-treating said catalyst precursor body for 2-4hr at 500-1000deg.C so as to obtain the invented cobalt porphyrin on carbon oxidation-reduction agent.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a carbon-supported cobalt porphyrin oxygen reduction catalyst. Background technique [0002] Due to their high energy, high efficiency, and environmental friendliness, fuel cells and metal-air batteries are expected to become the best clean energy sources in the future, and thus have attracted much attention. In the research of cathode catalysts for fuel cells and metal-air batteries, how to improve the catalytic activity of existing catalysts and develop new or better non-precious metal catalysts is very important. The high cost of noble metals (Pt, Au, Ir, etc.) and their susceptibility to CO poisoning limit their widespread use as electrocatalysts. Metalloporphyrin compounds have a high conjugated structure and chemical stability, and exhibit good electrocatalytic activity for molecular oxygen reduction. In recent years, they have gradually become ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/00B01J31/12B01J32/00
Inventor 谢先宇马紫峰任奇志
Owner SHANGHAI JIAO TONG UNIV
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