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Proton exchange membrane fuel cell cathode non-platinum catalyst and preparation method thereof

A fuel cell cathode and proton exchange membrane technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve unseen problems, achieve large active specific surface area, simple preparation method, and low synthesis cost Effect

Inactive Publication Date: 2014-10-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no relevant report on the preparation of non-platinum catalysts for proton exchange membrane fuel cells with such a hollow spherical structure.

Method used

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  • Proton exchange membrane fuel cell cathode non-platinum catalyst and preparation method thereof
  • Proton exchange membrane fuel cell cathode non-platinum catalyst and preparation method thereof
  • Proton exchange membrane fuel cell cathode non-platinum catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] 1) Measure 37mL formaldehyde (0.5mol) and 40mL isobutanol in a three-necked flask, then add 0.0335g magnesium carbonate while stirring, mix thoroughly, then slowly add 20.2g melamine (0.135mol) while stirring to raise the temperature, the added The molar ratio of melamine to formaldehyde is 1:3.7. When the temperature rises to 60°C, it is kept at about 40 minutes. The feeding time is controlled at about 30 minutes. At 80°C, 0.07g of phthalic anhydride is added to keep it warm for 1.5 hours, and it is slightly cooled and dehydrated under reduced pressure to obtain milky white Gel, that is, melamine formaldehyde resin;

[0042] 2) Weigh 3.2g of triblock polymer F127 (addition polymer of polypropylene glycol and ethylene oxide), 16.0g of ethanol and 2.0g of 0.2M hydrochloric acid solution in a beaker, mix them in a beaker, heat at 40°C and stir for 1 hour; then Add 4.16g of tetraethyl orthosilicate and 2.0g of melamine formaldehyde resin obtained in step 1) and 20wt% ethanol...

Embodiment 2

[0045] 1) Measure 37mL formaldehyde (0.5mol) and 40mL isobutanol in a three-necked flask, then add 0.0170g magnesium carbonate while stirring, mix, then slowly add 20.2g melamine (0.135mol) while stirring and heating up, the added The molar ratio of melamine to formaldehyde is 1:3.7, the time for heating up to 60°C is kept at about 40 minutes, and the feeding time is controlled at about 30 minutes. At 85°C, add 0.07g of phthalic anhydride and keep it warm for 0.5 hours, then cool down and dehydrate under reduced pressure to obtain a milky white gel, which is melamine formaldehyde resin.

[0046] 2) Weigh 1.6g of triblock polymer F127, 10g of ethanol and 1.0g of 0.2M hydrochloric acid solution in a beaker and mix them, heat at 42°C and stir for 50min; then add 3.58g of tetraethyl orthosilicate and the melamine prepared above 30wt% ethanol solution made of formaldehyde resin 3.0g and 7.0g ethanol (add appropriate amount of hydrochloric acid to promote compatibility), then add 2....

Embodiment 3

[0048] 1) Measure 37mL formaldehyde (0.5mol) and 40mL isobutanol in a three-necked flask, then add 0.0935g magnesium carbonate while stirring, mix, then slowly add 20.2g melamine (0.135mol) while stirring to raise the temperature, the added The molar ratio of melamine to formaldehyde is 1:3.7, the time for heating up to 60°C is kept at about 40 minutes, and the feeding time is controlled at about 30 minutes. At 82°C, add 0.07g of phthalic anhydride and keep it warm for 2 hours, then cool down and dehydrate under reduced pressure to obtain a milky white gel, which is melamine formaldehyde resin.

[0049] 2) Weigh 4.8g of triblock polymer F127, 20g of ethanol and 4.0g of 0.2M hydrochloric acid solution in a beaker and mix them, heat at 50°C and stir for 0.5 hours; then add 6.86g of tetraethyl orthosilicate and the above prepared A 10wt% ethanol solution (adding an appropriate amount of hydrochloric acid to promote mutual solubility) made of melamine formaldehyde resin 1.0g and 9...

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Abstract

The invention relates to a cathode non-platinum catalyst of a proton exchange membrane fuel cell and a preparation method thereof. The method comprises the following steps: melamine-formaldehyde resin preparation reaction is carried out, and metal salt is added into the melamine formaldehyde resin; complexing reaction occurs between the melamine formaldehyde resin and the metal salt to form a complex; and after solvent of the complex is evaporated, the complex is decomposed by heat treatment to form the cathode non-platinum catalyst with a hollow spherical structure of the proton exchange membrane fuel cell. The non-platinum catalyst has following advantages that firstly the non-platinum catalyst has a large activity ratio surface, so that the oxygen reduction activity of a catalyst is greatly improved; secondly the catalyst has a rich nitrogen source; thirdly the catalyst has an excellent activity of oxygen reduction; and fourthly the preparation method of the non-platinum catalyst is simple, and cheap metals such as Fe, Co and the like are used as the catalyst, so that the synthesis cost is lowered.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell cathode non-platinum catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation. technical background [0002] Proton Exchange Membrane Fuel Cell (PEMFC for short) directly converts the chemical energy stored in fuel and oxidant into electrical energy, with zero emission, no environmental pollution, no electrolyte corrosion, not limited by the Carnot cycle, and high energy conversion efficiency Much higher than the heat engine. The key component of proton exchange membrane fuel cell is called membrane electrode (MEA), which is composed of catalytic layer anode, cathode, electrolyte membrane and gas diffusion layer. So far, Pt and Pt-based alloys have been widely used as catalysts in proton exchange membrane fuel cells, but due to the scarcity and high value of Pt resources, the cost of proton exchange membrane fuel cells is very high. In addition, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B01J23/745B01J23/75B01J35/08
CPCY02E60/50
Inventor 李赏钱柳王家堂潘牧
Owner WUHAN UNIV OF TECH
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