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Fuel cell three-dimensional carbon structure loaded Pt-Pd-Cu alloy catalyst and preparation method thereof

An alloy catalyst, pt-pd-cu technology, applied in battery electrodes, structural parts, circuits, etc., can solve the problems of long delivery time, poor product quality, uniformity, and high price, and achieve stability and uniformity. Improved, excellent stability, small particle size effect

Pending Publication Date: 2022-01-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the slow kinetics of the cathode oxygen reduction reaction, the wide application of this device is limited, and some efficient catalysts are often required to achieve rapid energy conversion.
Usually the cathode uses a commercial carbon-supported platinum catalyst to increase the redox reaction rate, but there are problems such as low activity, poor stability, and poisoning. The product quality and uniformity of mass-produced domestic catalysts are mostly inferior to similar foreign imported catalysts. Therefore, the demand for domestic catalysts basically depends on foreign imports.
However, imported catalysts are expensive, resources are limited, and the delivery time is long, which cannot meet the domestic demand for fuel cells for a long time.

Method used

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  • Fuel cell three-dimensional carbon structure loaded Pt-Pd-Cu alloy catalyst and preparation method thereof
  • Fuel cell three-dimensional carbon structure loaded Pt-Pd-Cu alloy catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A fuel cell three-dimensional carbon structure supported Pt-Pd-Cu alloy catalyst and a preparation method thereof, the specific steps are as follows:

[0033] Step 1: Weigh 0.5g of carbon nanotubes, 0.5g of graphene, 0.5g of fullerene, and 1g of carbon black, and mix them together to obtain mixed powder 1, and then add it to 20ml of 10wt% nitric acid solution , and then magnetically stirred for 5 hours under the condition of a 60° C. water bath, and then cooled to room temperature to obtain solution 1.

[0034] Step 2: The solution 1 obtained in step 1 is further subjected to suction filtration, and then washed with a large amount of deionized water until the pH of the filtrate is neutral, and the mixed powder 2 is obtained.

[0035] Step 3: Put the mixed powder 2 obtained in step 2 into a vacuum drying oven, and dry at 60° C. for 5 hours under vacuum conditions to obtain a dry mixed powder 3 .

[0036] Step 4: Transfer the dry mixed powder 3 obtained in step 3 to a ba...

Embodiment 2

[0049] Step 1: Weigh 0.5g of carbon nanotubes, 0.5g of graphene, 0.5g of fullerene, and 1g of carbon black, and mix them together to obtain mixed powder 1, and then add it to 20ml of 10wt% nitric acid solution , then stirred for 5 hours with a magnetic stirrer under the condition of a 60° C. water bath, and then cooled to room temperature to obtain solution 1.

[0050] Step 2: The solution 1 obtained in step 1 is further subjected to suction filtration, and then washed with a large amount of deionized water until the pH of the filtrate is neutral, and the mixed powder 2 is obtained.

[0051] Step 3: Put the mixed powder 2 obtained in step 2 into a vacuum drying oven, and dry at 60° C. for 5 hours under vacuum conditions to obtain a dry mixed powder 3 .

[0052] Step 4: Transfer the dry mixed powder 3 obtained in step 3 to a ball mill jar, and then put it into a ball mill at a speed of 250 rpm, and mill for 2 hours. A dry and uniformly mixed powder 4, namely a three-dimensiona...

Embodiment 3

[0065] Step 1: Weigh 1.5g of carbon nanotubes, 1.5g of graphene, 1.5g of fullerene, and 10g of carbon black, and mix them together to obtain mixed powder 1, which is then added to 100ml of 10wt% nitric acid solution , then magnetically stirred for 5 hours under the condition of 80°C water bath, and then cooled to room temperature to obtain solution 1.

[0066] Step 2: The solution 1 obtained in step 1 is further subjected to suction filtration, and then washed with a large amount of deionized water until the pH of the filtrate is neutral, and the mixed powder 2 is obtained.

[0067] Step 3: Put the mixed powder 2 obtained in step 2 into a vacuum drying oven, and dry at 80° C. for 10 hours under vacuum conditions to obtain a dry mixed powder 3 .

[0068] Step 4: Transfer the dry mixed powder 3 obtained in step 3 to a ball mill jar, and then put it into a ball mill at a speed of 400 rpm, and mill for 2 hours. A dry and uniformly mixed powder 4, namely a three-dimensional carbon...

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Abstract

The invention discloses a three-dimensional carbon structure supported Pt-Pd-Cu alloy catalyst and a preparation method thereof, and belongs to the technical field of fuel cell catalysts. The preparation method comprises the following steps: 1) pretreating various carbon structures to obtain three-dimensional carbon structure powder; 2) mixing the three-dimensional carbon structure powder, a hexahydroxyplatinic acid di (ethanol ammonium) aqueous solution, a palladium nitrate aqueous solution, a copper nitrate aqueous solution and ethylene glycol to obtain a primary reaction solution; 3) adjusting the pH value to a proper value by using a NaOH solution to obtain an intermediate reaction solution; 4) heating, preserving heat and cooling the intermediate reaction liquid to obtain a substance to be subjected to suction filtration; 5) carrying out suction filtration, washing and drying on the substance to be subjected to suction filtration to obtain a primary catalyst product; and 6) carrying out annealing and plasma post-treatment on the primary catalyst product to obtain a final catalyst product. The particle size of the catalyst is smaller than 3.5 nm, the mass activity is larger than 350 mA / mgPt at 0.9 V, the mass activity attenuation is smaller than 10% in a 10000-circle aging test, and the provided method is suitable for preparing various platinum alloy catalysts.

Description

Technical field: [0001] The invention relates to the field of fuel cell catalysts. More specifically, the present invention relates to a fuel cell three-dimensional carbon structure supported Pt-Pd-Cu alloy catalyst and a preparation method thereof. Background technique: [0002] With the rapid development of human society, the global energy consumption is increasing year by year. After the traditional fossil energy is continuously exploited and used, it has caused serious energy shortage and environmental pollution problems to human society. Therefore, it is urgent to find some new clean energy. Replace traditional fossil energy. In recent years, hydrogen has attracted widespread attention due to its high energy density and environmental protection. Proton exchange membrane fuel cell is an energy conversion device that converts hydrogen energy into electrical energy, and has the advantages of high conversion efficiency, environmental protection, and simple structure, show...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/926H01M4/921H01M4/88Y02E60/50
Inventor 王如志宗超园刘金伟
Owner BEIJING UNIV OF TECH