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Composite catalyst carrier for fuel cell, and preparation method and application thereof

A composite catalyst, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limited specific surface area, single structure, insufficient protection of catalyst active components, etc., to achieve high electronic conductivity, high application value, The effect of ensuring the activity and catalytic efficiency

Active Publication Date: 2018-06-08
中盛鑫控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large specific surface area, reasonable pore structure and excellent corrosion resistance, etc., and currently commonly used fuel cell catalyst supports mainly include carbon nanotube supports, mesoporous carbon supports, noble metal supports, gel supports, conductive ceramic supports, Graphene, etc., because of its single structure and limited specific surface area, the protective effect on the active components of the catalyst is not enough

Method used

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  • Composite catalyst carrier for fuel cell, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] The preparation of composite catalyst carrier for fuel cell, the steps are as follows:

[0032] a. Using 0.3g of polystyrene microspheres as a template, add 60mL of isopropanol, stir at 250r / min, add 2g of silicon source, the silicon source is hexamethyldisiloxane, adjust the pH of the solution to 10 with ammonia water, Centrifuge at high speed, take the precipitate, wash 3 to 5 times with water, and obtain polystyrene / SiO 2 Composite microspheres;

[0033] b. To the polystyrene / SiO prepared in step a 2 Add 50mL, 30wt% ethanol to the composite microspheres, ultrasonically disperse for 20min, add 2g of surfactant and 10g of titanium source, the surfactant is polyvinylpyrrolidone; the titanium source is titanium tetrachloride; heat in a water bath at 70°C for 3h, Centrifuge, take the precipitate, wash 3 to 5 times with water, and dry in vacuum at 60°C for 12 hours to obtain polystyrene / SiO 2 / TiO 2 Composite microspheres;

[0034] c, the polystyrene / SiO obtained in s...

Embodiment 2

[0037] The preparation of composite catalyst carrier for fuel cell, the steps are as follows:

[0038] a. Take 0.5g polystyrene microspheres as a template, add 90mL of isopropanol, stir at 300r / min, add 5g of silicon source, the silicon source is ethyl orthosilicate, methyl orthosilicate, adjust the pH of the solution with ammonia water value to 10, centrifuge, take the precipitate, wash 3 to 5 times with water, and obtain polystyrene / SiO 2 Composite microspheres;

[0039] b. To the polystyrene / SiO prepared in step a 2 Add 60mL, 35wt% ethanol to the composite microspheres, ultrasonically disperse for 20min, add 2g surfactant and 20g titanium source, the surfactant is sodium dodecylbenzenesulfonate; the titanium source is tetrabutyl titanate; 80 Heating in a water bath at ℃ for 1 hour, centrifuging, taking the precipitate, washing with water 3 to 5 times, and drying in vacuum at 60 ℃ for 10 hours to obtain polystyrene / SiO 2 / TiO 2 Composite microspheres;

[0040] c, the po...

Embodiment 3

[0043] The preparation of composite catalyst carrier for fuel cell, the steps are as follows:

[0044] a. Take 0.4g polystyrene microspheres as template, add 60mL isopropanol, stir at 240r / min, add 4g silicon source, silicon source is trimethylethoxysilane, methyltrimethylsilane, use ammonia water Adjust the pH value of the solution to 10, centrifuge, take the precipitate, wash 3 to 5 times with water, and obtain polystyrene / SiO 2 Composite microspheres;

[0045] b. To the polystyrene / SiO prepared in step a 2 Add 55mL, 34wt% ethanol to the composite microspheres, ultrasonically disperse for 20min, add 2g surfactant and 15g titanium source, the surfactant is fatty acid glyceride; the titanium source is tetrabutyl titanate; heat in a water bath at 78°C 2h, centrifuge, take the precipitate, wash 3-5 times with water, and dry in vacuum at 60°C for 11h to obtain polystyrene / SiO 2 / TiO 2 Composite microspheres;

[0046] c, the polystyrene / SiO obtained in step b 2 / TiO 2 Mix t...

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Abstract

The invention belongs to the technical field of fuel cell catalyst carriers, and provides a composite catalyst carrier for a fuel cell, a preparation method thereof, and an application thereof in a fuel cell catalyst. The prepared Pt / TiC / TiON / SiON composite catalyst having a core-shell structure has a high activity, allows the Pt load capacity to be 0.1-0.15 mg / cm<2>, has a low cost, and also contains a small amount of Pd, a SiO2 / TiO2 composite microsphere is doped with N to obtain a TiON / SiON composite material used as a shell structure, titanium carbide is used as a core, so the carrier canguarantee the chemical stability of the titanium carbide, guarantee high electron conductivity in an acidic medium, guarantee the activity and the catalysis efficiency of the catalyst and prolong theservice life of the catalyst active material Pt, has excellent performances and a large specific surface area, provides a reliable place for catalyst loading, has a strong anticorrosion performance, can effectively avoid poisoning and inactivation of the Pt catalyst, and has high application values.

Description

technical field [0001] The invention belongs to the technical field of preparation of a proton exchange membrane catalyst carrier, and in particular relates to a composite catalyst carrier for a fuel cell and a preparation method and application thereof. Background technique [0002] Fuel cell is a clean energy technology device emerging in recent years, and it is a new generation of power generation technology after hydropower, thermal power and nuclear power generation. It is a high-efficiency continuous power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy by means of electrochemical reaction without combustion. A fuel cell consists of an anode, a cathode, and an electrolyte between the two electrodes. A fuel gas, such as H2, CH4, coal gas, etc., is continuously passed through the anode side, and O2 or air is passed through the cathode side, through the proton conduction of the electrolyte, electron transfer occurs ...

Claims

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Application Information

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IPC IPC(8): H01M4/92
CPCH01M4/921H01M4/925Y02E60/50
Inventor 陈庆廖健淞
Owner 中盛鑫控股有限公司
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