Method for producing low Pt content electro-catalyst by microwave

An electrocatalyst and microwave technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of Pt-based alloy electrocatalysts that have not yet been discovered, and achieve the goal of preparing Mild conditions, strong controllability and good stability

Inactive Publication Date: 2008-05-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has not been found in the search that the use of microwaves to simulta...

Method used

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  • Method for producing low Pt content electro-catalyst by microwave
  • Method for producing low Pt content electro-catalyst by microwave

Examples

Experimental program
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Embodiment 1

[0027] (1) Carry out high-energy ball milling after the Vulcan XC-72 carbon black of 5gCabot company is fully dried, then with 30wt%H 2 o 2 Soak at room temperature for 4 hours for pretreatment, after washing, put it into a vacuum drying oven for drying at 110° C. to obtain 4.8 g of pretreated carbon black.

[0028] (2) Pipette 0.33ml of chloroplatinic acid of 0.00753g / ml, 3.94ml of nickel acetate of 0.00253g / ml, weigh 0.0027gTiO 2 Nanotube powder and pretreated 0.02g carbon black were added to a flask filled with 30ml ethylene glycol solution, and the pH value was adjusted with 0.5M NaOH solution to make it 10; ultrasonic 30min, mixed, and then placed in a condensing In the microwave oven of the reflux tube, the reaction was heated with a power of 195W for 10min.

[0029] (3) The reaction product was placed for 12 hours, then suction-filtered, washed three times with 75°C double-pure water, dried in a 60°C vacuum oven for 12 hours after suction filtration, and ground to obt...

Embodiment 2

[0034] (1) Carry out high-energy ball milling after the Vulcan XC-72 carbon black of 5g Cabot Company is fully dried, then use 30wt%H 2 o 2 Soak at room temperature for 4 hours for pretreatment, after washing, put it into a vacuum drying oven for drying at 110° C. to obtain 4.8 g of pretreated carbon black.

[0035] (2) Pipette 0.8ml of chloroplatinic acid of 0.00753g / ml, 4.79ml of nickel acetate of 0.00253g / ml, weigh 0.0029gTiO 2 Nanotube powder and 0.02g of pretreated carbon black were added to a flask filled with 30ml of ethylene glycol solution, and the pH value was adjusted with 0.5M NaOH solution to make it 10; ultrasonic 30min, mixed, and then placed in a condensing In the microwave oven of the reflux tube, the reaction was heated with a power of 195W for 10min.

[0036] (3) The reaction product was placed for 12 hours, then suction-filtered, washed three times with 75°C double-pure water, dried in a 60°C vacuum oven for 12 hours after suction filtration, and ground t...

Embodiment 3

[0039] (1) Carry out high-energy ball milling after the Vulcan XC-72 carbon black of 5g Cabot Company is fully dried, then use 30wt%H 2 o 2 Soak at room temperature for 4 hours for pretreatment, after washing, put it into a vacuum drying oven for drying at 110° C. to obtain 4.8 g of pretreated carbon black.

[0040] (2) Pipette 1.86ml of chloroplatinic acid of 0.00753g / ml, 4.79ml of nickel acetate of 0.00253g / ml, weigh 0.0029gTiO 2 Nanotube powder and 0.02g of pretreated carbon black were added to a flask filled with 30ml of ethylene glycol solution, and the pH value was adjusted with 0.5M NaOH solution to make it 10; ultrasonic 30min, mixed, and then placed in a condensing In the microwave oven of the reflux tube, the reaction was heated with a power of 195W for 10min.

[0041] (3) The reaction product was placed for 12 hours, then suction-filtered, washed three times with 75°C double-pure water, dried in a 60°C vacuum oven for 12 hours after suction filtration, and ground ...

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Abstract

The invention relates to a microwave preparation method of electro catalyst with low Pt content, belonging to electro catalysis for fuel cell field. The invention comprises following steps: 1 to 20 parts by weight(pbw) of carbon powder is high energy ball milled after being thoroughly dried, 20 to 400 pbw of H2O2 is then used for reflux, the carbon powder is dried after being washed with de-ionized water, and the carbon after pretreatment can be obtained after natural cooling; the precursor chloroplatinic acid, nickel acetate solution, TiO2 nano-tube powder and carbon are put into a flask, after the pH value is adjusted by adding glycol solution, the mixture is mixed uniformly by ultrasound, wherein, the mass content of Pt is 2.5 to 20%, the mass content of Ni is 2.5 to 20%, the mass content of TiO2 nano-tube powder is 5 to 30%; the mixed solution is then put into a microwave reactor with a condensation and reflux device for thermal reaction, when the reaction is finished, the electro catalyst can be obtained from the mixed solution after being laid aside, filtered, water washes, vacuum dried and grinded. The invention has the advantages of mild and controllable conditions, short reaction time, simple operation and green revolution.

Description

technical field [0001] The invention relates to a method of fuel cell electrocatalysis technology, in particular to a method for preparing electrocatalysts with low Pt content using microwaves for fuel cells. Background technique [0002] Fuel cells are a new type of energy system with high energy density, high efficiency, and environmental friendliness, but the Pt content in commonly used Pt / C electrocatalysts is high, and commercial catalysts with more practical applications (such as John Matthey, E-TEK, etc. The content of Pt in the company's products) is mostly 20%, sometimes up to 40% or even higher. Due to the high price of the noble metal Pt, when the Pt content in the electrocatalyst is high, the overall price of the electrocatalyst will increase accordingly. Therefore, it is necessary to explore the preparation of electrocatalysts with low Pt content. [0003] When the electrochemical reaction occurs on the direct alcohol fuel cell, the surface of the pure Pt elect...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J21/18H01M4/92
CPCY02E60/50
Inventor 吴省蒋淇忠马紫峰
Owner SHANGHAI JIAO TONG UNIV
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