High-purity Cu3Pt nanoparticles and preparation method thereof

A nanoparticle, high-purity technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of particle size reduction, environmental damage, time-consuming, etc., to increase the concentration of chloride ions, Environmental friendliness, effect of improving purity

Pending Publication Date: 2021-06-11
佛山(华南)新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can achieve the product in one step, there are still some shortcomings: 1) the whole reaction takes a long time and the cost is high; 2) oleylamine, as an organic ligand, will also produce surface adsorption while reducing the particle size, and the later surface The acetone and n-hexane used for cleaning have certain toxicity, and a large amount of synthesis will cause certain damage to the environment
Although this method achieves the Pt-Cu alloy obtained in the aqueous environment, however, in the synthesis of Cu 3 Pt alloy process often contains some Cu 2 O impurity, and also requires the use of long-chain alkylamines

Method used

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  • High-purity Cu3Pt nanoparticles and preparation method thereof
  • High-purity Cu3Pt nanoparticles and preparation method thereof
  • High-purity Cu3Pt nanoparticles and preparation method thereof

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preparation example Construction

[0036] The invention provides a high-purity Cu 3 The preparation method of Pt nanoparticles is characterized in that, comprising:

[0037] S1: adding inorganic copper salt, NaCl and / or KCl to water, and mixing uniformly to obtain a mixed solution 1;

[0038] Wherein, the inorganic copper salt is a water-soluble copper salt; it can choose CuCl 2 , Cu(NO 3 ) 2 、CuSO 4 、CuCH 3 (COO) 2 One or more of, but not limited to. Preferably, the inorganic copper salt is selected from CuCl 2 , which can cooperate well with NaCl and KCl to avoid the occurrence of CuO and Cu in the reaction process 2 O and other impurities.

[0039]Specifically, in the mixed solution 1, the molar concentration of the inorganic copper salt is 10-50 mmol / L, exemplarily 10 mmol / L, 15 mmol / L, 20 mmol / L, 30 mmol / L, 40 mmol / L, 45 mmol / L, but Not limited to this. Preferably, the molar concentration of the inorganic copper salt is 10-20 mmol / L.

[0040] Among them, NaCl and KCl can provide Cl - , during ...

Embodiment 1

[0056] This embodiment provides a high-purity Cu 3 The preparation method of Pt nanoparticles is as follows:

[0057] (1) With deionized water as solvent, CuSO 4 As the solute, configure 37.5mL of a solution with a concentration of 40mmol / L, then add 0.564g NaCl, stir evenly, and obtain a mixed solution 1;

[0058] (2) Add 12.5 mL of ascorbic acid with a concentration of 1.8 mol / L to the mixed solution 1, place it in a constant temperature water bath at 95° C. for 50 minutes, and stir during the heating process to obtain the mixed solution 2;

[0059] (3) Add 6.25mL of K with a concentration of 15mmol / L to the mixed solution 2 2 PtCl 6 solution, and then reacted at 90°C for 6h to obtain a mixed solution 3;

[0060] (4) Centrifuge the mixed solution 3, disperse the obtained product in deionized water for ultrasonication and centrifuge, then disperse in ethanol for ultrasonication, centrifuge again, and then dry at 40°C to obtain the product.

Embodiment 2

[0062] This embodiment provides a high-purity Cu 3 The preparation method of Pt nanoparticles is as follows:

[0063] (1) With deionized water as solvent, CuCl 2 As the solute, configure 37.5mL of a solution with a concentration of 15mmol / L, then add 0.101g of KCl, stir evenly, and obtain a mixed solution 1;

[0064] (2) Add 12.5 mL of ascorbic acid with a concentration of 1 mol / L to the mixed solution 1, place it in a constant temperature water bath at 98° C. for 10 minutes, and stir during the heating process to obtain the mixed solution 2;

[0065] (3) Add 5mL of 10mmol / L H to the mixed solution 2 14 Cl 6 o 6 Pt solution, and then reacted at 98°C for 2h to obtain a mixed solution 3;

[0066] (4) Centrifuge the mixed solution 3, disperse the obtained product in deionized water for ultrasonication and centrifuge, then disperse in ethanol for ultrasonication, centrifuge again, and then dry at 40°C to obtain the product.

[0067] The obtained sample is carried out X-ray d...

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Abstract

The invention discloses a preparation method of high-purity Cu3Pt nanoparticles. The method comprises the following steps of (1) adding inorganic copper salt, NaCl and / or KCl into water, and uniformly mixing to obtain a mixed solution 1; (2) adding a reducing agent into the mixed solution 1, and reacting for a first preset time to obtain a mixed solution 2; (3) adding an inorganic platinum salt into the mixed solution 2, and reacting for a second preset time to obtain a mixed solution 3; and (4) carrying out liquid-solid separation on the mixed solution 3 to obtain a solid, namely a high-purity Cu3Pt nanoparticle finished product. Correspondingly, the invention also discloses a high-purity Cu3Pt nanoparticle. By increasing the concentration of chloride ions in the reaction solution, generation of an intermediate product is promoted, then the intermediate product is reduced, generation of impurities is inhibited, and the purity is improved; and the high-purity Cu3Pt particles can be synthesized in one step, secondary purification is not needed, and the synthesis cost is reduced.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a high-purity Cu 3 Preparation method of Pt nanoparticles. Background technique [0002] In recent years, with the excessive use of traditional fossil energy, the problem of air quality in my country has become increasingly serious. The development of new energy models has gradually become a hot topic of research. Among many new energy sources, hydrogen energy is due to its high energy density and post-combustion CO 2 Zero emissions have long been considered the most ideal clean energy. Since hydrogen hardly exists in the form of simple substances on the earth, the electrolysis of water by electrochemical means has become an important means of obtaining hydrogen. However, due to the existence of the activation energy barrier, the required potential is much higher than the theoretical value in the actual hydrogen evolution process of water electrolysis. There...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y40/00B82Y30/00B22F1/054Y02E60/50
Inventor 刘欣美李顺刘勇梁宸杨文龙
Owner 佛山(华南)新材料研究院
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