Band-shaped carbon-carrier metal catalyst, preparation method and application thereof

A metal catalyst, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst supports, chemical instruments and methods, etc., can solve chemical corrosion, catalyst durability reduction, nano-carbon aerogel preparation Difficulties and other problems to achieve the effect of prolonging life, preventing agglomeration, and improving the ability to resist carbon monoxide poisoning

Inactive Publication Date: 2013-07-31
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to prepare nano-carbon airgel, and as an amorphous carbon airgel material, it is prone to chemical corrosion in the harsh working environment of PEMFC, resulting in a decrease in the durability of the catalyst.

Method used

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  • Band-shaped carbon-carrier metal catalyst, preparation method and application thereof
  • Band-shaped carbon-carrier metal catalyst, preparation method and application thereof
  • Band-shaped carbon-carrier metal catalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Put 1 gram of carbon nanotubes in 100ml of 60% H 2 SO 4 , stirred at 70°C for 1 h to prepare a sulfuric acid solution containing carbon nanotubes;

[0032] (2) 5 g of KMnO 4 Add it into the sulfuric acid solution containing carbon nanotubes, and continue to stir for 1h to obtain carbon nanoribbons containing oxidized cuts, KMnO 4 and a mixture of sulfuric acid;

[0033] (3) Add H to the mixture in step (2) in sequence 2 o 2 Centrifuge with hydrochloric acid and deionized water, wash the precipitate several times, and dry it in a vacuum oven at 50°C for 12 hours to obtain graphene oxide nanobelts;

[0034] (4) Put the graphene oxide nanoribbon into deionized water, ultrasonic for 30 minutes, then add chloroplatinic acid, palladium acetate, nickel acetate, the content of platinum in the catalyst metal is 10%, and the content of palladium and nickel is respectively 5%, After stirring for 20 minutes, add 0.1 g of sodium borohydride, perform a reduction reaction at...

Embodiment 2

[0036] (1) Put 1 gram of carbon nanotubes in 100ml 98%H 2 SO 4 , stirred at 80°C for 2 hours to prepare a sulfuric acid solution containing carbon nanotubes;

[0037] (2) 5 g of KMnO 4 Added to the sulfuric acid solution containing carbon nanotubes, and continued to stir for 0.5 h, to obtain 4 and a mixture of sulfuric acid;

[0038] (3) Add H to the mixture in step (2) in sequence 2 o 2 Centrifuge with hydrochloric acid and deionized water, wash the precipitate several times, and dry it in a vacuum oven at 50°C for 12 hours to obtain impurity-free carbon nanoribbons;

[0039] (4) Put the impurity-free nano-carbon ribbon into methanol, ultrasonicate for 20 minutes, then add chloroplatinic acid and manganese acetate solution, the platinum content in the catalyst is 20%, the manganese content is 4%, after stirring for 20 minutes, 120 Reduction reaction at ℃ for 10 h, filtered, vacuum-dried, and cooled at room temperature to obtain the strip-shaped carbon-supported metal ca...

Embodiment 3

[0041] (1) Put 1 gram of carbon nanotubes in 100ml H 3 PO 4 , 40%H 2 SO 4 , stirred at 90°C for 1 h to prepare a sulfuric acid solution containing carbon nanotubes;

[0042] (2) 5 g of KMnO 4 Add to the sulfuric acid solution containing carbon nanotubes, continue to stir for 3h, and obtain carbon nanoribbons containing oxidized cuts, KMnO 4 , a mixture of sulfuric acid;

[0043] (3) Add H to the mixture in step (2) in sequence 2 o 2 Centrifuge with hydrochloric acid and deionized water, wash the precipitate several times, and dry it in a vacuum oven at 50°C for 12 hours to obtain impurity-free carbon nanoribbons;

[0044] (4) Put the impurity-free nanocarbon ribbon into ethylene glycol, ultrasonicate for 20 minutes, then add platinum platinum acid and ferric chloride solution, the platinum content in the catalyst is 30%, and the iron content After stirring at 10% for 20 minutes, reduction reaction at 120°C for 24 hours, filtration, vacuum drying, and cooling at room te...

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Abstract

The invention discloses a carbon-carrier precious metal catalyst for fuel cell, a preparation method thereof and an application thereof. The catalyst uses band-shaped nanometer carbon as the carrier, sodium borohydride, methanol or glycol as a reducing agent, and co-reduces the band-shaped nanometer carbon and the precious metal acid or the precious metal salts to obtain the precious metal/band-shaped nanometer carbon catalyst for the fuel cell, preferably a platinum loading amount being 10-60 wt %. The catalyst is high in initial electrochemical active surface area, relatively small in current density attenuation during a chronoamperometry test, and relatively high in current density during an electrochemical timing current test compared with that of present catalysts, and shows relatively high electrochemical activity, relatively high current density and relatively excellent electrochemical stability.

Description

technical field [0001] The invention relates to a strip-shaped carbon-supported metal catalyst and its preparation method and application, in particular to a nano-belt-shaped carbon-supported platinum catalyst for fuel cells and a preparation method thereof. Background technique [0002] Catalyst support is one of the key materials in the catalytic layer of polymer membrane fuel cells. As a catalyst carrier, it must have a large specific surface area, appropriate pore size distribution, excellent electrochemical stability, and high electrical conductivity, etc., and can provide high electrical conductivity, good gas channels, and sufficient water capacity. . The catalyst support not only directly affects the particle size, dispersion and activity of the catalyst, but also affects the conductivity, mass transfer and electrochemical specific surface area of ​​the catalytic layer. At present, catalyst supports are mainly based on carbon materials. Among them, activated carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/90H01M4/92H01M4/88B01J32/00B01J21/18B01J23/89B01J23/656B01J23/652B01J23/42
CPCY02E60/50
Inventor 张永明王超楠袁望章李虹
Owner SHANGHAI JIAO TONG UNIV
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