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Preparation method for platinum-copper nano-particles with controllable morphologies

A nanoparticle, platinum-copper technology, applied in the field of nanomaterials, can solve the problems of high price and inactivation of platinum in fuel cells, and achieve the effects of easy operation and implementation, uniform size and easy access

Active Publication Date: 2017-05-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commercialization of fuel cells is deactivated by the high price of platinum and the poisoning of intermediates such as CO during the anode reaction.

Method used

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  • Preparation method for platinum-copper nano-particles with controllable morphologies
  • Preparation method for platinum-copper nano-particles with controllable morphologies
  • Preparation method for platinum-copper nano-particles with controllable morphologies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for preparing platinum-copper nanoparticles with controllable morphology, comprising the steps of:

[0046] (1) Weighing medicines

[0047] Weigh 0.0200g of platinum acetylacetonate and 0.0100g of copper acetylacetonate into a 50ml three-necked round-bottomed flask, and then pipette 2.0mL of oleylamine, 1.0mL of oleic acid, and 7mL of dibenzyl ether. The magnet is placed at the bottom of the bottle. It should be noted that the reaction was performed in a fume hood, which will not be described below.

[0048] (2) Nitrogen gas

[0049] Nitrogen was passed into the closed device system of the three-necked flask to check the airtightness of the device.

[0050] (3) Reaction condition setting

[0051] Turn on the heating switch of the heating mantle and set the heating temperature to 130°C. This temperature was maintained for 30 minutes.

[0052] (4) Pass CO gas

[0053] Stop feeding nitrogen, start feeding CO gas, the gas purity is 99.999%, the gas flow rate i...

Embodiment 2

[0062] A method for preparing platinum-copper nanoparticles with controllable morphology, comprising the steps of:

[0063] Weigh 0.0100g of platinum acetylacetonate and 0.0100g of copper acetylacetonate into a 50ml three-necked round-bottomed flask, then pipette 2.0mL of oleylamine, 1.0mL of oleic acid, and 7mL of dibenzyl ether. Under the condition of nitrogen protection, the mixed system was heated and stirred at 130°C for 30min, the nitrogen gas was stopped, and the CO gas was started to flow in at a gas rate of 100mL / min, the reaction temperature was set at 230°C, and the reaction time was 40min. The whole reaction process was kept under the protection of CO. Cool to room temperature, wash with n-hexane and ethanol, and centrifuge until the supernatant liquid is colorless and clear. Take the bottom precipitate and disperse it in 10 ml of n-hexane for storage to obtain a stable dispersion of platinum-copper nanoparticles. The morphology of the obtained platinum-copper na...

Embodiment 3

[0065] A method for preparing platinum-copper nanoparticles with controllable morphology, comprising the steps of:

[0066] Weigh 0.0500g of platinum acetylacetonate and 0.0100g of copper acetylacetonate into a 50ml three-neck round-bottomed flask, then pipette 2.0mL of oleylamine, 1.0mL of oleic acid, and 7mL of dibenzyl ether. Under the condition of nitrogen protection, the mixed system was heated and stirred at 130°C for 30min, the nitrogen gas was stopped, and the CO gas was started, the gas flow rate was 100mL / min, the reaction temperature was set at 230°C, and the reaction time was 40min. The whole reaction process was kept under the protection of CO. Cool to room temperature, wash with n-hexane and ethanol, and centrifuge until the supernatant liquid is colorless and clear. Take the bottom precipitate and disperse it in 10 ml of n-hexane for storage to obtain a stable dispersion of platinum-copper nanoparticles. The morphology of the obtained platinum-copper nanoparti...

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Abstract

The invention discloses a preparation method for platinum-copper nano-particles with controllable morphologies. The preparation method comprises the following steps: 1) mixing a reductive organic solvent, a platinum source and a copper source to obtain a mixed solution A; 2) heating and stirring the mixed solution A at 80-130 DEG C and under the condition of inert atmosphere protection until all solid reagents are completely dissolved to obtain a solution B; 3) stopping charging the inert gas, and charging a gas C in the solution B; and 4) heating the solution B to 210-250 DEG C and insulating heat to obtain a suspension D, cooling the suspension D to room temperature, centrifuging, taking bottom precipitates, and centrifugally washing the bottom precipitates by virtue of an organic solvent to obtain black precipitates, that is, the platinum-copper nano-particles. The method is simple and practicable, and the octahedral platinum-copper nano-particles are obtained through controllable synthesis; and moreover, the platinum-copper nano-particles obtained by the method are monolayer-dispersed and uniform in dimension, and have an average particle diameter of less than 10nm. The platinum-copper nano-particles can be used as a nano-catalytic material.

Description

technical field [0001] The invention relates to the field of nanomaterials. More specifically, it relates to a preparation method of platinum-copper nanoparticles with controllable morphology. Background technique [0002] In recent years, due to the consumption of primary energy, the problem of environmental pollution has become more and more serious, and recyclable clean energy is imminent. Fuel cells have attracted much attention due to their advantages of zero emission of pollutants and room temperature operation. However, the commercialization of fuel cells is deactivated by the high price of platinum and the poisoning of intermediates such as CO during the anode reaction. [0003] In order to reduce the amount of platinum, it is particularly important to develop platinum-based nanocatalysts. Generally, there are two existing methods for improving the catalytic performance of catalysts: one is to adjust the morphology of the catalyst to maximize its catalytic activit...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0553B22F1/07B22F1/054
Inventor 程道建戴长庆杨洋刘新月
Owner BEIJING UNIV OF CHEM TECH
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