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Reverse micelle method for preparing platinum ruthenium/carbon catalyst

A technology of carbon catalyst and reverse micelles, which is applied in the field of reverse micelles for the preparation of carbon-supported platinum-ruthenium catalysts, which can solve problems such as uneven particle size, poor particle dispersion, and harsh reaction conditions

Inactive Publication Date: 2008-07-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation methods of Pt-Ru / C catalysts reported more include inorganic colloid method, impregnation method, gel sol method and precipitation method, etc. The catalysts prepared by these original methods have poor particle dispersion, uneven particle size and reaction conditions. more stringent issues

Method used

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  • Reverse micelle method for preparing platinum ruthenium/carbon catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] ① Configure chloroplatinic acid (H 2 PtCl 6 ) aqueous solution, its concentration is 0.0386mol / L; configure ruthenium trichloride (RuCl 6 ) aqueous solution with a concentration of 0.0765mol / L.

[0020] ② Prepare a mixture of cyclohexane, sodium lauryl sulfate and n-octanol. The mass ratio of sodium lauryl sulfate to cyclohexane is 0.115, and the mass ratio to n-octanol is 0.7.

[0021] ③Take 100ml of the mixed solution of the above step ②, the molar ratio of water to surfactant is 7, ultrasonically oscillate for 20 minutes, then add 2.19ml of chloroplatinic acid and 1.1ml of ruthenium trichloride aqueous solution dropwise. Sonicate for 30 minutes to form a transparent reverse micellar system.

[0022] ④ Add 100 mg of carbon black Vulcan XC-72 carbon black to the system described in the above step ③, and oscillate ultrasonically for 20 minutes.

[0023] 5. Add 4.5ml of 0.2mol / L potassium borohydride aqueous solution (6 times the theoretical value, 2 times the volum...

Embodiment 2

[0029] ① Configure chloroplatinic acid (H 2 PtCl 6 ) aqueous solution, its concentration is 0.1mol / L; configure ruthenium trichloride (RuCl 3 ) aqueous solution, the concentration of which is 0.04mol / L.

[0030] ② Prepare a mixture of cyclohexane, sodium lauryl sulfate and n-octanol. The mass ratio of sodium lauryl sulfate to cyclohexane is 0.078, and the mass ratio to n-octanol is 1.0.

[0031] ③Take 130ml of the mixed solution of the above step ②, the molar ratio of water to surfactant is 11, ultrasonically oscillate for 15 minutes, and then add 1.45ml of chloroplatinic acid and 3.61ml of ruthenium trichloride aqueous solution dropwise. Sonicate for 60 minutes to form a transparent reverse micellar system.

[0032] ④ Add 100 mg of carbon black Vulcan XC-72 carbon black to the system described in the above step ③, and oscillate ultrasonically for 30 minutes.

[0033] 5. Add 2.53ml of 1.5mol / L sodium borohydride aqueous solution (15 times the theoretical value, 0.5 times ...

Embodiment 3

[0039] ① Configure chloroplatinic acid (H 2 PtCl 6 ) aqueous solution, its concentration is 0.02mol / L; configure ruthenium trichloride (RuCl 3 ) aqueous solution, the concentration range of which is 0.20mol / L.

[0040] ② Prepare a mixture of cyclohexane, sodium lauryl sulfate and n-octanol. The mass ratio of sodium lauryl sulfate to cyclohexane is 0.15, and the mass ratio to n-octanol is 1.2.

[0041] ③Take 150ml of the mixed solution of the above step ②, the molar ratio of water to surfactant is 4.2, ultrasonically oscillate for 40 minutes, then add 5.10ml of chloroplatinic acid and 0.25ml of ruthenium trichloride aqueous solution dropwise. Sonicate for 20 minutes to form a transparent reverse micellar system.

[0042] ④ Add 100 mg of carbon black Vulcan XC-72 carbon black to the system described in the above step ③, and oscillate ultrasonically for 60 minutes.

[0043] 5. Add 8.0ml of 0.053mol / L potassium borohydride aqueous solution (3 times the theoretical value, 1.5 ...

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Abstract

The invention discloses a reverse micelles method of preparing platinum ruthenium / carbon catalyst, which includes the following steps: 0.02 to 0.10mol / L chloroplatinic acid aqueous solution and 0.04 to 0.20 mol / L ruthenium trichloride aqueous solution are prepared to form water phase; hexamethylene is prepared into oil phase, sodium laurylsulfate is taken as surfactant and n-octyl alcohol is taken as cosurfactant; the mass ratio of sodium laurylsulfate, hexamethylene and n-octyl alcohol is 1:0.07 to 0.15:0.5 to 1.2; the product is mixed and added in carbon black, and the receives ultrasonic vibration and mechanical mixing for 20 to 60 min, so that a reverse micelle is loaded on the carbon black; a reducing agent, demulsifier acetone and solution are added for filtration and drying. The reverse micelle of the invention provides a micro environment, and can become an ideal place of nano particle synthetization. Because of the method of preparing nano particles, only simple equipments are needed, the operation is under room temperature, the metal particles have grain size which is easy to be controlled and spread quite evenly.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, and can also be widely used in other chemical and chemical fields. The invention particularly relates to a reverse micelle method for preparing a carbon-supported platinum ruthenium (PtRu / C) catalyst. Background technique [0002] A fuel cell is a highly efficient and environmentally friendly power generation device that directly converts the chemical energy stored in fuel and oxidant into electrical energy. Today, when the environment and energy are concerned, the research and development of fuel cells are getting more and more attention from the governments of various countries. [0003] Proton exchange membrane fuel cell (PEMFC) has a series of advantages such as high energy conversion efficiency, large specific energy, rapid start-up and environmental friendliness, and is one of the most efficient and clean power generation technologies in the future. The membran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J21/18H01M4/92
CPCY02E60/50
Inventor 田建华赵沧燕徐云飞单忠强
Owner TIANJIN UNIV
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