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Method for preparing CuPt alloy nanoparticles at room temperature

A technology of alloy nanoparticles and room temperature, applied in the direction of nanotechnology, can solve the problems of increasing the complexity of the preparation process, increasing energy consumption, etc., and achieve the effects of improving product purity, simplifying cleaning steps, and small product size

Pending Publication Date: 2021-06-11
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] First of all, in order to ensure the high purity and small size of CuPt alloy particles, long-chain alkylamines need to be added as surfactants during the preparation, and the removal of these active agents will undoubtedly increase the complexity of the preparation process;
[0009] Secondly, the preparation of CuPt alloy needs to be realized at a reaction temperature above 95 degrees Celsius, and too high a temperature increases the energy consumption of the preparation

Method used

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  • Method for preparing CuPt alloy nanoparticles at room temperature
  • Method for preparing CuPt alloy nanoparticles at room temperature
  • Method for preparing CuPt alloy nanoparticles at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Take deionized water as a solvent, configure a volume of 40 milliliters, a copper chloride solution with a concentration of 15 mmol / L and a volume of 5 milliliters, a concentration of 10 mmol / L of chloroplatinic acid, stir for 30 minutes until uniform , to obtain a mixed solution 1;

[0037] 2) Add a mass of 0.18 g of potassium chloride to the mixed solution 1, stir at room temperature for 10 minutes until uniform, add a volume of 5 ml of hydrochloric acid solution with a concentration of 0.1 mol / L, and continue stirring for 15 minutes to obtain a mixed solution 2;

[0038] 3) Add ascorbic acid with a volume of 12.5 ml and a concentration of 1.0 mol / L to the mixed solution 2, and stir and react at room temperature for 6 hours;

[0039] 4) The obtained product is separated by a centrifuge, firstly dispersed in deionized water for ultrasonication, and then secondly centrifuged, dispersed in ethanol for ultrasonication, centrifuged again to extract the sample powder, an...

Embodiment 2

[0043] 1) Take deionized water as a solvent, configure a volume of 40 milliliters, a copper chloride solution with a concentration of 18 mmol / liter and a volume of 5 milliliters, a concentration of chloroplatinic acid with a concentration of 10 mmol / liter, stir until uniform, and obtain mixed solution 1;

[0044] 2) Add a mass of 0.3 g of potassium chloride to the mixed solution 1, stir at room temperature for 5 minutes, add a volume of 2 ml of hydrochloric acid with a concentration of 0.15 mol / L, and continue stirring for 20 minutes to obtain a mixed solution 2;

[0045] 3) Add ascorbic acid with a volume of 12.5 ml and a concentration of 1.2 mol / L to the mixed solution 2, and stir and react at room temperature for 5 hours;

[0046] 4) The obtained product is separated with a centrifuge, firstly dispersed in deionized water and ultrasonically centrifuged for the second time, dispersed in ethanol and ultrasonically extracted, and centrifuged again to extract the sample powder,...

Embodiment 3

[0049] 1) With deionized water as a solvent, configure a volume of 35 milliliters, a copper chloride solution with a concentration of 16 mmol / L and a volume of 5 milliliters, a concentration of 10 mmol / L of chloroplatinic acid, stir for 10 minutes until uniform , to obtain a mixed solution 1;

[0050] 2) Add 0.315 g of potassium chloride into the mixed solution 1, stir at room temperature for 5 minutes, add 8 ml of HCl with a concentration of 0.1 mol / L, and continue stirring for 20 minutes to obtain the mixed solution 2;

[0051] 3) Add ascorbic acid with a volume of 12.5 ml and a concentration of 1.2 mol / L to the mixed solution 2, and stir and react at room temperature for 5 hours;

[0052] 4) The obtained product is separated with a centrifuge, first dispersed in deionized water and ultrasonically centrifuged for the second time, dispersed in ethanol for ultrasonication, and centrifuged again to extract the sample powder, and then dried in a blast drying oven at 50 degrees C...

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Abstract

The invention discloses a method for preparing CuPt alloy nanoparticles at room temperature. The method mainly comprises the following steps: 1) preparing a soluble Cu precursor and a soluble Pt precursor, and mixing according to a certain proportion; 2) adding a certain amount of potassium chloride and hydrochloric acid solution, and uniformly stirring; 3) adding reducing agent ascorbic acid, continuously stirring, and reacting at room temperature for 5-8 hours; and 4) performing solid separation and cleaning on a product obtained after the reaction, and drying to obtain solid powder, namely a high-purity CuPt alloy finished product. According to the method, a certain amount of hydrochloric acid solution is added into the reaction solution, so that the solubility of the reaction solution to CuCl is improved, the generation of CuCl impurities is avoided, and the product purity is improved. Due to the fact that the thermodynamic curing rate of growth of nanocrystals can be reduced through the low reaction temperature, CuPt alloy particles with small size (65-75 nanometers) and good monodispersity are obtained under the condition that no surfactant is added. The whole preparation process is easy to realize, and the later sample cleaning step is simple.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing CuPt alloy nanoparticles at room temperature. Background technique [0002] In recent years, with the gradual consumption of traditional energy sources, the development of clean energy has gradually become the most challenging topic. Among many clean energy sources, liquid fuel cells are considered to be one of the most important new generation energy sources. At present, the problems faced by liquid fuel batteries mainly include: high catalyst cost and low working efficiency. Therefore, the development of low-cost and high-efficiency electrocatalysts becomes the key to solve the above problems. Compared with a single noble metal electrocatalyst, the CuPt alloy nanomaterial is based on the lattice contraction effect and the synergistic effect of the bimetal, which combines the characteristics of low cost and high efficiency of the electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 刘欣美李雪梁宸杨春洋杨文龙林家齐
Owner HARBIN UNIV OF SCI & TECH
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