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Complex type non noble metal oxygen reduction catalyst

A non-precious metal and catalyst technology, applied in the field of non-precious metal oxygen reduction catalysts, can solve the problems of unsatisfactory oxygen reduction catalytic performance and improved stability, and achieve the effect of improving oxygen reduction catalytic performance and increasing the peak current density of oxygen reduction

Inactive Publication Date: 2009-04-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, such catalysts still have problems such as the oxygen reduction catalytic performance cannot meet the practical requirements, and the stability needs to be further improved.

Method used

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  • Complex type non noble metal oxygen reduction catalyst
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  • Complex type non noble metal oxygen reduction catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: ultrasonic method (Supersonic, abbreviated as SS)

[0036] (1) After getting 5g carbon black to dry, ball mill with the speed of 300rpm for 2 hours, then use 100ml30wt% H 2 o 2 The aqueous solution was refluxed at 25°C for 4 hours for pretreatment, then washed with deionized water, dried in a vacuum oven at 110°C for 2 hours, cooled naturally and passed through a 300-mesh sieve to obtain 4.8g of pretreated carbon black;

[0037] (2) In the round bottom flask of 100ml, add 0.04g silicon dioxide, 0.06g four-(4-methoxyphenyl) porphyrin (TMPP), 0.1g cobalt acetate, 0.3g after 30wt% H 2 o 2 The carbon black and 40ml of glacial acetic acid pretreated by the aqueous solution are mixed evenly and placed in an ultrasonic reactor, ultrasonically reacted for 1 hour at a power of 600 watts, then magnetically stirred for 2 hours, and finally evaporated to dryness with a rotary evaporator to obtain 0.33g Catalyst precursor;

[0038] (3) Weigh 0.2 g of the catalyst p...

Embodiment 2

[0041] Embodiment 2: ultrasonic method (Supersonic, abbreviated as SS)

[0042] (1) After getting 5g carbon black to dry, ball mill with the speed of 300rpm for 2 hours, then use 100ml30wt% H 2 o 2 The aqueous solution was refluxed at 25°C for 4 hours for pretreatment, then washed with deionized water, dried in a vacuum oven at 110°C for 2 hours, cooled naturally and passed through a 300-mesh sieve to obtain 4.8g of pretreated carbon black;

[0043] (2) In a 100ml round bottom flask, add 0.02g silicon dioxide, 0.08g tetrakis-(4-methoxyphenyl) porphyrin (TMPP), 0.1g cobalt acetate, 0.3g through 30wt% H 2 o 2 The carbon black and 40ml of glacial acetic acid pretreated by the aqueous solution are mixed evenly and placed in an ultrasonic reactor, ultrasonically reacted at a power of 600 watts for 1 hour, then magnetically stirred for 2 hours, and finally evaporated to dryness with a rotary evaporator to obtain 0.32g Catalyst precursor;

[0044] (3) Weigh 0.2 g of the catalyst ...

Embodiment 3

[0047] Embodiment 3: microwave method (Microwave, abbreviated as MW)

[0048] (1) After getting 5g carbon black to dry, ball mill with the speed of 300rpm for 2 hours, then use 100ml30wt% H 2 o 2 The aqueous solution was refluxed at 25°C for 4 hours for pretreatment, then washed with deionized water, dried in a vacuum oven at 110°C for 2 hours, cooled naturally and passed through a 300-mesh sieve to obtain 4.8g of pretreated carbon black;

[0049] (2) In the round bottom flask of 100ml, add 0.02g silicon dioxide, 0.08g tetrakis-(4-methoxyphenyl) porphyrin (TMPP), 0.1g copper acetate, 0.3g after 30wt% H 2 o 2 Pretreated carbon black and 40ml of glacial acetic acid were dispersed by ultrasound for 15 minutes, placed in a microwave oven with a reflux condenser, and refluxed for 150 minutes at a power of 130 watts. After natural cooling, 40ml of methanol was added, and after standing and filtering Wash with methanol until colorless, then dry the filter cake in a vacuum oven at ...

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Abstract

The invention discloses a composite non-noble metal oxygen reduction catalyst, consisting of an oxidant, a metal porphyrin compound and a carbon, wherein, the mass ratio of the oxidant and the metal porphyrin compound is 1:1-1:80; and the mass ratio of the metal porphyrin compound and the carbon is 1:1-1:20. The catalyst uses cheap SiO, SiO2, ZrO, ZrO2 or ZnO2 to partly replace the metal porphyrin compound in the carbon-loaded metal porphyrin series oxygen reduction catalyst used for low-temperature fuel battery, leads the oxygen reduction peak current density of the series catalyst to be improved to 1.5-3 times under slight change of the oxygen reduction peak level and reduces the cost.

Description

technical field [0001] The invention relates to a catalyst, especially a composite type non-noble metal oxygen reduction catalyst, which is applied in a fuel cell. Background technique [0002] Today, with the increasing shortage of energy resources and the growing call for environmental protection, low-temperature fuel cells such as proton exchange membrane fuel cells and direct alcohol fuel cells, as a clean and pollution-free energy conversion device, have low operating temperature and no electrolyte. A series of advantages such as loss, long life, high power density and energy density have shown broad application prospects and commercial value in electric vehicle power supply, mobile power supply, micro power supply and large power plants, etc., and have attracted widespread attention in the international community in recent years interest. So far, the research and development of low-temperature fuel cells have made great progress, and have achieved demonstration operat...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J31/12H01M4/90
CPCY02E60/50
Inventor 原鲜霞夏小芸马紫峰
Owner SHANGHAI JIAO TONG UNIV
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