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Preparation method of PtCo/C intermetallic compound catalyst with high metal content

An intermetallic compound, high metal technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of agglomeration and sintering affecting the performance of catalysts, and achieve the effect of small particle size and excellent catalytic performance.

Pending Publication Date: 2022-05-13
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the prior art, provide a method for preparing a PtCo / C intermetallic compound catalyst with high metal content, and solve the problems that the agglomeration and sintering of PtCo sites seriously affect the performance of the catalyst

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  • Preparation method of PtCo/C intermetallic compound catalyst with high metal content
  • Preparation method of PtCo/C intermetallic compound catalyst with high metal content
  • Preparation method of PtCo/C intermetallic compound catalyst with high metal content

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preparation example Construction

[0033] A kind of preparation method of the PtCo / C intermetallic compound catalyst of high metal content, specifically comprises the steps:

[0034] (1) Disperse the carbon carrier into an analytically pure ethylene glycol solution, and ultrasonically disperse for 30-60 minutes;

[0035] (2) Dissolve the platinum salt precursor in an analytically pure ethylene glycol solution and sonicate for 10-20min;

[0036] (3) Add the ethylene glycol solution of the platinum salt precursor to the carbon carrier ethylene glycol solution and sonicate for 30-60 minutes, add the alkali-ethylene glycol solution to adjust the pH value to 8-12, and disperse it by ultrasonic for 30-60 minutes;

[0037] (4) Add a reducing agent to the mixed solution obtained in step (3), and stir at room temperature for 30-60min;

[0038] (5) reacting the mixed solution obtained in step (4) in an oil bath in a protective atmosphere, and filtering, washing and drying after the reaction;

[0039] (6) Dissolving the...

Embodiment 1

[0055] A kind of preparation method of high metal content PtCo / C intermetallic compound catalyst, specifically comprises the following steps:

[0056] (1) Disperse 600mg of Vulcan XC-72 carbon powder produced by American Cabot Company in 100ml of ethylene glycol solution, and ultrasonically disperse for half an hour;

[0057] (2) 1.03g of chloroplatinic acid was dissolved in 106ml of analytically pure ethylene glycol solution for ultrasonication for 10 minutes;

[0058] (3) Add the chloroplatinic acid ethylene glycol solution to the Vulcan XC-72 ethylene glycol solution for half an hour, add sodium hydroxide to adjust the pH value to 10, and ultrasonically disperse for 1 hour;

[0059] (4) Add 60 mg of glucose to the mixed solution obtained in step (3), and stir at room temperature for half an hour;

[0060] (5) React the mixed solution obtained in step (4) in an oil bath in an argon atmosphere, the temperature of the oil bath is 150° C., and the reaction time is 4 hours. Aft...

Embodiment 2

[0067] A kind of preparation method of high metal content PtCo / C intermetallic compound catalyst, specifically comprises the following steps:

[0068] (1) Disperse 600mg of Vulcan XC-72 carbon powder produced by American Cabot Company in 100ml of ethylene glycol solution, and ultrasonically disperse for half an hour;

[0069] (2) 1.03g of chloroplatinic acid was dissolved in 106ml of analytically pure ethylene glycol solution for ultrasonication for 10 minutes;

[0070] (3) Add the ethylene glycol solution of the chloroplatinic acid precursor to the Vulcan XC-72 ethylene glycol solution for half an hour, add sodium hydroxide to adjust the pH value to 10, and ultrasonically disperse for 1 hour;

[0071] (4) Add 60 mg of glucose to the mixed solution obtained in step (3), and stir at room temperature for half an hour;

[0072] (5) React the mixed solution obtained in step (4) in an oil bath in an argon atmosphere, the temperature of the oil bath is 150° C., and the reaction tim...

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Abstract

The invention discloses a preparation method of a PtCo / C intermetallic compound catalyst with high metal content, and the PtCo / C electrocatalyst with high metal content is prepared by adopting a polyol reduction-impregnation method. The method specifically comprises the following steps: dispersing a carbon carrier into an analytically pure ethylene glycol solution, dissolving a platinum salt precursor into the analytically pure ethylene glycol solution, adding the platinum salt precursor ethylene glycol solution into the carbon carrier ethylene glycol solution, adding an alkali-ethylene glycol solution to adjust the pH value to 8-12, adding a reducing agent, and carrying out an oil bath reaction on the mixed solution in a protective atmosphere to obtain the platinum-loaded carbon carrier. Filtering, washing and drying after the reaction is finished, dissolving the obtained solid powder in ethanol, adding an auxiliary precursor, stirring to be viscous, drying and fully grinding the obtained viscous material, annealing the obtained solid powder in a tube furnace in a reducing atmosphere, and pickling and drying after annealing. The metal content of the prepared PtCo / C catalyst can reach 30%-50%, and the catalytic performance is excellent; the PtCo / C catalyst prepared by the method is small in particle size and uniform in particle.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a preparation method of a PtCo / C intermetallic compound catalyst with high metal content. Background technique [0002] A fuel cell is a device that can directly convert the chemical energy stored in oxygen and fuel into electrical energy by means of an electrochemical reaction. It has the characteristics of high energy density, high energy conversion efficiency, and environmental friendliness. Therefore, As a new generation of clean energy technology, it has attracted much attention. However, there are still many obstacles in the industrialization process of fuel cells. The biggest obstacle is the slow oxygen reduction reaction at the cathode. Compared with the fuel oxidation reaction at the anode, its kinetic rate is nearly 2 to 3 orders of magnitude slower. This makes it require a large number of highly efficient catalysts to reduce its overpotential a...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/88H01M4/926H01M4/921
Inventor 李剑锋章意陈亨权
Owner XIAMEN UNIV
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