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Platinum-based catalyst containing uranyl phosphate tetrahydrate and preparation method thereof

A technology of uranyl phosphate tetrahydrate and catalysts, which is applied in nanotechnology for materials and surface science, electrical components, battery electrodes, etc., and can solve problems such as catalyst performance that needs to be improved

Pending Publication Date: 2021-09-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing fuel cell anode catalysts still need to be improved in terms of material preparation methods and catalyst performance.

Method used

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  • Platinum-based catalyst containing uranyl phosphate tetrahydrate and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: preparation embodiment

[0023] Add 140mg of Vulcan XC-72 carbon powder and 70mL of ethylene glycol into the round bottom flask in sequence, and disperse them ultrasonically to obtain a dispersion. The prepared 20 mg of uranyl phosphate tetrahydrate powder was ultrasonically dispersed in 5 mL of ultrapure water, and then poured into a flask to obtain a mixed solution. Add chloroplatinic acid solution containing 40 mg of Pt dropwise into the flask under stirring condition, then move the flask into an oil bath, stir at 140°C for 2 hours, during which high-purity nitrogen gas is continuously passed into the flask. After the flask was cooled, it was washed by ethanol centrifugally, and dried by blasting at 60°C. The resulting catalyst is noted as 20%Pt-10%HUP / C.

Embodiment 2

[0024] Embodiment 2: preparation embodiment

[0025] Put 80mg of Vulcan XC-72 carbon powder and 70mL of ethylene glycol into the round bottom flask according to this, and disperse by ultrasonic to obtain the dispersion liquid. The prepared 80 mg of uranyl phosphate tetrahydrate powder was ultrasonically dispersed in 5 mL of ultrapure water, and then poured into a flask to obtain a mixed solution. Add chloroplatinic acid solution containing 40 mg of Pt dropwise into the flask under stirring condition, then move the flask into an oil bath, and stir at 160°C for 3 hours, during which high-purity nitrogen gas is continuously passed into the flask. After the flask was cooled, it was washed with ethanol centrifugally, and dried by blowing at 50°C. The resulting catalyst was noted as 20%Pt-40%HUP / C.

Embodiment 3

[0026] Embodiment 3: preparation embodiment

[0027] Add 160mg of Vulcan XC-72 carbon powder and 70mL of ethylene glycol into the round-bottomed flask accordingly, and after ultrasonic dispersion, add 0.1mol / L sodium hydroxide solution dropwise to adjust the pH of the dispersion to >10. Add chloroplatinic acid solution containing 40 mg of Pt dropwise into the flask under stirring condition, then move the flask into an oil bath, and stir at 120°C for 4 hours, during which high-purity nitrogen gas is continuously passed into the flask. After the flask was cooled, it was washed by ethanol centrifugally, and dried by blowing at 55°C. The resulting catalyst was noted as 20% Pt / C.

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Abstract

The invention discloses a platinum-based catalyst containing uranyl phosphate tetrahydrate and a preparation method thereof, and belongs to the technical field of catalysts. The platinum-based catalyst containing uranyl phosphate tetrahydrate comprises the following components by weight: 15-25% of metal platinum, 15-82% of carbon and 3-60% of a catalytic promoter uranyl phosphate tetrahydrate (HUP). According to the platinum-based catalyst containing uranyl phosphate tetrahydrate and the preparation method of the platinum-based catalyst, the obtained platinum-based catalyst has higher catalytic performance, the catalytic activity of the material can be effectively improved, the poisoning resistance can be enhanced, and the stability of a fuel cell can be improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a platinum-based catalyst containing uranyl phosphate tetrahydrate and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, fossil energy has been exhausted and environmental pollution has become more and more serious. Governments of all countries are committed to developing clean energy to alleviate environmental problems. The research and development history of fuel cells is close to 180 years. It can directly convert the chemical energy of hydrogen, ethanol and other fuels into electrical energy. [0003] As far as direct ethanol fuel cells are concerned, due to the difficulty in breaking the C-C bond of ethanol, a series of intermediate products will be produced during the electrocatalytic oxidation process, among which CO will be adsorbed on the surface of platinum to form a stable platinum carbonyl group, which will affect the...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/92B82Y30/00B82Y40/00
CPCH01M4/8663H01M4/926B82Y30/00B82Y40/00Y02E60/50
Inventor 赵耀林左峰陈忠村童大银聂少尉肖松涛
Owner XI AN JIAOTONG UNIV
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