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High-performance carbon-supported PdPtPb nanosheet catalyst for fuel cells and preparation method thereof

A fuel cell and catalyst technology, applied in the fields of nanotechnology, battery electrodes, nanotechnology, etc. for materials and surface science, can solve the problems of high price and low reserves, and achieve low equipment requirements, low cost, and stable electrochemistry. performance effect

Inactive Publication Date: 2019-03-29
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, platinum has the following serious problems as a fuel cell catalyst: (1) less reserves; (2) expensive

Method used

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  • High-performance carbon-supported PdPtPb nanosheet catalyst for fuel cells and preparation method thereof
  • High-performance carbon-supported PdPtPb nanosheet catalyst for fuel cells and preparation method thereof
  • High-performance carbon-supported PdPtPb nanosheet catalyst for fuel cells and preparation method thereof

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preparation example Construction

[0035] A method for preparing a high-performance carbon-supported PdPtPb nanosheet catalyst for fuel cells, comprising the steps of:

[0036] (1) According to Pd x Pt y Pb z Nanosheets, where x, y, and z represent the molar percentages of the corresponding elements, x+y+z=1, 0.3≤x≤0.5, 0≤y≤0.2, 0.25≤z≤0.75, 0≤y:x≤ 0.4, 0.5≤z: (x+y)≤1.5 ratio Weigh 4.65~7.75mg of palladium acetylacetonate, 0~4mg of platinum acetylacetonate, 5.15~15.45mg of lead acetylacetonate, 18~36mg of ascorbic acid and 5.5~70mg of carbon The carrier is put into a 25ml polytetrafluoroethylene container, and 10ml of 1-octadecene and oleylamine are added as solvents at the same time, and ultrasonically dispersed for 1 to 2 hours to obtain a uniformly dispersed reaction solution; the carbon carrier includes XC-72, Ketjen black, graphene, ordered mesoporous carbon.

[0037] (2) Put the uniformly dispersed reaction solution into a reaction kettle, put the reaction kettle into a heating furnace, control the te...

Embodiment 1

[0049] Preparation of carbon-supported PdPb@C nanosheets:

[0050] (1) Take a certain amount of palladium acetylacetonate 7.75mg, lead acetylacetonate 8mg, ascorbic acid 36mg, XC-72 18mg and put it into a 25ml polytetrafluoroethylene container, add 1-octadecene and oleylamine of 5ml simultaneously as Solvent, ultrasonic dispersion for 1 hour to obtain a uniformly dispersed reaction solution;

[0051] (2) Put the uniformly dispersed reaction solution into a reaction kettle, put the reaction kettle into a heating furnace, control the temperature to 180°C, and the reaction time is 6 hours to obtain a carbon-supported PdPb@C nanosheet suspension solution;

[0052] (3) Cool the suspension solution to room temperature, add cyclohexane, then add ethanol, centrifuge and wash with ethanol several times, and then disperse it in the ethanol solution.

[0053] (4) Add a small amount of glacial acetic acid to the obtained solution, and centrifuge after ultrasonication. After washing with...

Embodiment 2

[0061] Preparation of carbon-supported PdPtPb@C nanosheets:

[0062] (1) Weigh a certain amount of palladium acetylacetonate 6.97mg, platinum acetylacetonate 1mg, lead acetylacetonate 8mg, ascorbic acid 36mg, Ketjen black 18mg and put them into a 25ml polytetrafluoroethylene container, and add 5ml of 1-18 Alkene and oleylamine were used as solvents, ultrasonically dispersed for 1 hour, and a uniformly dispersed reaction solution was obtained;

[0063] (2) Put the uniformly dispersed reaction solution into a reaction kettle, put the reaction kettle into a heating furnace, control the temperature to 180°C, and the reaction time is 6 hours to obtain a suspension solution of carbon-supported PdPtPb@ketjen black nanosheets;

[0064] (3) Cool the suspension solution to room temperature, add cyclohexane, then add ethanol, centrifuge and wash with ethanol several times, and then disperse it in the ethanol solution.

[0065] (4) Add a small amount of glacial acetic acid to the obtaine...

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Abstract

The invention relates to a high-performance PdPtPb nanosheet catalyst for fuel cells and a preparation method thereof, which belong to the field of electrochemistry and new energy. Palladium acetylacetonate or palladium acetylacetonate and platinum acetylacetonate is / are used as reaction precursor(s), lead acetylacetonate is used as a shape guiding agent, ascorbic acid is used as a reducing agent,1-octadecene and oleamine are used as reaction solvents, and XC-72, Ketjen black, graphene or ordered mesoporous carbon is used as a carbon carrier. The materials are heated in a reaction kettle for4-8 hours at the temperature of160-200 DEG C to obtain PdPtPb nanosheets with a two-dimensional structure. The high-performance PdPtPb nanosheet catalyst for fuel cells prepared in the invention has good dispersion, high catalytic activity dispersion and stability, and the preparation method is simple and easy to control.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and new energy, and relates to a high-performance PdPtPb nanosheet catalyst for a fuel cell and a preparation method thereof. Background technique [0002] Recognized as the cleanest new energy vehicle, hydrogen fuel cell vehicles are expected to lead the automotive industry into the era of pollution-free new energy vehicles. The ultimate vision of the entire fuel cell industry is to replace traditional engines with fuel cells. [0003] Among all kinds of fuel cells, proton exchange membrane fuel cells are most suitable for automobiles. The most critical materials are catalysts and proton exchange membranes, and the cost and performance of catalysts determine the development level and commercialization process of fuel cell technology. Platinum metal is the best catalyst for most fuel cells. However, platinum has the following serious problems as a fuel cell catalyst: (1) the reserves ar...

Claims

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Application Information

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IPC IPC(8): H01M4/92B82Y30/00
CPCB82Y30/00H01M4/921H01M4/926Y02E60/50
Inventor 安静郭世海徐立红赵晨阳祁焱赵栋梁
Owner CENT IRON & STEEL RES INST
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