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Carbon-loaded surface platinum-enriched platinum-nickel intermetallic compound and preparation method and application thereof

An intermetallic compound, carbon-supported platinum technology, which is used in the preparation of platinum-nickel intermetallic compounds and the field of platinum-nickel intermetallic compounds with rich platinum on carbon-supported surface, can solve the problem of reducing the amount of platinum metal, the amount of precious metal platinum, and poor stability. It can improve the activity and stability, reduce the amount of platinum metal, and overcome the large amount of precious metal platinum.

Inactive Publication Date: 2016-08-31
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a platinum-nickel intermetallic compound with carbon-supported surface and rich platinum, which is based on the carbon-supported ordered platinum-nickel intermetallic compound. The activity and stability of the catalyst overcome the technical problems of traditional platinum-carbon catalysts such as large amount of noble metal platinum, low catalytic activity, and poor stability.

Method used

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  • Carbon-loaded surface platinum-enriched platinum-nickel intermetallic compound and preparation method and application thereof
  • Carbon-loaded surface platinum-enriched platinum-nickel intermetallic compound and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The preparation of a platinum-nickel intermetallic compound on a carbon-supported surface that is rich in platinum comprises the following steps:

[0035] (1) Weigh 26.7mL of 1mg / mL PtCl 4 Ethylene glycol solution, 6.7mL 4mg / mL NiCl 2 ·6H 2 O ethylene glycol solution in a 100mL beaker and mix well, then add 20mL of 0.7mol L -1 NaOH ethylene glycol solution, then add 200mg sodium glutamate sonication to completely dissolve;

[0036] (2) Measure 66.7mL of ethylene glycol solution into a 100mL beaker, add 20mg of sodium citrate sonication to dissolve completely, then add 80mg of carbon black XC-72R and sonicate for 10min;

[0037] (3) The liquid obtained in step (1) and step (2) was combined and ultrasonicated for 20-40 min, then transferred to a 150 mL Teflon-lined reactor, and reacted at 200°C for 5 h. After cooling down to room temperature, the solid was obtained by suction filtration, washed with ethanol and water three times respectively, and dried in vacuum at 5...

Embodiment 2

[0049] The preparation of a platinum-nickel intermetallic compound on a carbon-supported surface that is rich in platinum comprises the following steps:

[0050] (1) Weigh 30mL of 1mg / mL PtCl 4 Ethylene glycol solution, 8.4 mL of 4 mg / mL NiCl 2 ·6H 2 O ethylene glycol solution was mixed evenly in a 100mL beaker, and then 55mL of 0.4mol L -1 NaOH ethylene glycol solution, then add 150mg sodium glutamate sonication to completely dissolve;

[0051] (2) Measure 70mL of ethylene glycol solution into a 100mL beaker, add 30mg of sodium citrate sonication to dissolve completely, then add 90mg carbon black XC-72R sonication for 10min;

[0052] (3) The liquid obtained in step (1) and step (2) was combined and ultrasonicated for 20-40 min, then transferred to a 150 mL polytetrafluoroethylene-lined reactor, and reacted at 180° C. for 10 h. After cooling down to room temperature, the solid was obtained by suction filtration, washed with ethanol and water three times respectively, and ...

Embodiment 3

[0064] The preparation of a platinum-nickel intermetallic compound on a carbon-supported surface that is rich in platinum comprises the following steps:

[0065] (1) Weigh 25mg PtCl respectively 4 , 26.8mg NiCl 2 ·6H 2 O in a 100mL beaker, add 60mL of ethylene glycol, ultrasonically dissolve it completely, and then add 15mL of 1.0mol·L -1 NaOH ethylene glycol solution, then add 280mg sodium glutamate sonication to completely dissolve;

[0066] (2) Measure 70mL of ethylene glycol solution into a 100mL beaker, add 15mg of sodium citrate sonication to dissolve completely, then add 78mg carbon black XC-72R sonication for 10min;

[0067] (3) The liquid obtained in step (1) and step (2) was combined and ultrasonicated for 20-40 min, then transferred to a 150 mL polytetrafluoroethylene-lined reactor, and reacted at 195° C. for 6 h. After cooling down to room temperature, the solid was obtained by suction filtration, washed with ethanol and water three times respectively, and dri...

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Abstract

The invention provides a carbon-loaded surface platinum-enriched platinum-nickel intermetallic compound which is prepared by the following method: adding carbon black, sodium glutamate and sodium citrate into an ethylene glycol solution containing a platinum precursor and a nickel precursor, and generating a carbon-loaded platinum-nickel disordered alloy through a solvothermal reaction; then carrying out heat treatment of the carbon-loaded platinum-nickel disordered alloy in a reducing atmosphere, and transforming into a carbon-loaded platinum-nickel ordered intermetallic compound; and finally, dispersing the carbon-loaded platinum-nickel ordered intermetallic compound in water, carrying out surface platinum enriching through dropping a platinum precursor aqueous solution, and generating the carbon-loaded surface platinum-enriched platinum-nickel intermetallic compound. The surface platinum enriching treatment is carried out based on the carbon-loaded platinum-nickel ordered intermetallic compound, the activity and the stability of a catalyst are improved while the amount of platinum metal is relatively lowered, and the problems that a traditional platinum-carbon catalyst has large amount of precious metal platinum, low catalytic activity and poor stability and the like are overcome. The invention also discloses a preparation method and application of the carbon-loaded surface platinum-enriched platinum-nickel intermetallic compound.

Description

technical field [0001] The invention relates to a carbon-supported platinum-nickel intermetallic compound, in particular to a carbon-supported platinum-nickel intermetallic compound with a platinum-rich surface. The invention also relates to a preparation method of a platinum-nickel intermetallic compound on a carbon-supported surface rich in platinum. The invention also relates to the use of a platinum-nickel intermetallic compound with a carbon-supported surface rich in platinum. Background technique [0002] With the continuous development of human society, the global energy crisis has gradually become prominent, and the direct use of fossil energy has caused serious pollution to the earth's environment, threatening the living quality of the earth's creatures. Therefore, it is imminent to develop a clean and efficient energy industry. Direct methanol fuel cell is a device that converts the chemical energy of fuel into electrical energy through an electrochemical reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89
CPCB01J23/892
Inventor 杨辉王亚蒙邹志青邹亮亮黄庆红
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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