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CuPd alloy nanocrystal preparation and component regulation and control method

An alloy nanocrystal, mixed liquid technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the atomic percentage of Cu and Pd cannot be further regulated, and the atomic percentage of Cu and Pd cannot be controlled. , increase the complexity of product extraction, etc., to achieve the effect of retaining its own properties, improving product purity, and ensuring surface cleanliness

Active Publication Date: 2021-12-21
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the yield of the resulting product is only 45%, the cost is higher, and the yield is lower (Guo, Penghu, et al."CuPd mixed-metal HKUST-1 as a catalyst for aerobic alcohol oxidation."The Journal of Physical Chemistry C 122.37(2018):21433-21440)
[0007] 2. The extraction and cleaning process is complicated
These organic solvents are adsorbed on the sample surface, increasing the complexity of product extraction
[0009] 3. Unable to control the atomic percentage of Cu and Pd in ​​the alloy
However, the atomic percentages of Cu and Pd in ​​the resulting alloy cannot be further regulated

Method used

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  • CuPd alloy nanocrystal preparation and component regulation and control method
  • CuPd alloy nanocrystal preparation and component regulation and control method
  • CuPd alloy nanocrystal preparation and component regulation and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: Preparation 1 of high-purity CuPd nanocrystals

[0035] 1) Take copper chloride as the solute and deionized water as the solvent, configure 19 ml of copper chloride solution with a concentration of 15 mmol / L, add 150 mg of potassium chloride, stir evenly with a magnetic stirrer and place at 95 degrees Celsius , to obtain the mixed solution 1;

[0036] 2) Dissolving 0.05 mmol of palladium chloride powder in 5 ml of hydrochloric acid solution with a concentration of 0.1 mol / L, heated to 85 degrees Celsius to dissolve, and obtained mixed solution 2;

[0037] 3) Add the mixed solution 2 to the mixed solution 1, and stir at 95 degrees Celsius for 15 minutes to obtain the mixed solution 3;

[0038] 4) Add 6 ml of ascorbic acid with a concentration of 1.0 mol / L to the mixed solution 3, and stir rapidly at 95 degrees Celsius for 5 hours;

[0039] 5) The obtained product is separated by a centrifuge, first dispersed in deionized water and then ultrasonically cent...

Embodiment 2

[0041] Embodiment 2: the preparation 2 of high-purity CuPd nanocrystal

[0042] 1) Take copper chloride as the solute and deionized water as the solvent, configure 19 ml of copper chloride solution with a concentration of 15 mmol / L, add 150 mg of potassium chloride, stir evenly with a magnetic stirrer and place at 95 degrees Celsius , to obtain the mixed solution 1;

[0043] 2) Dissolving 0.05 mmol of palladium chloride powder in 2.5 ml of hydrochloric acid solution with a concentration of 0.1 mol / L, heated to 90 degrees Celsius to dissolve, and obtained mixed solution 2;

[0044] 3) Add the mixed solution 2 to the mixed solution 1, and stir at 95 degrees Celsius for 15 minutes to obtain the mixed solution 3;

[0045] 4) Add 6 ml of ascorbic acid with a concentration of 1.0 mol / L to the mixed solution 3, and stir rapidly at 95 degrees Celsius for 5 hours;

[0046] 5) The obtained product is separated by a centrifuge, first dispersed in deionized water and then ultrasonically...

Embodiment 3

[0049] Embodiment 3: Preparation 3 of high-purity CuPd nanocrystals

[0050] 1) Take copper chloride as the solute and deionized water as the solvent, configure 19 milliliters of copper chloride solution with a concentration of 15 mmol / L; add 150 mg of potassium chloride, stir evenly with a magnetic stirrer and place at 95 degrees Celsius , to obtain the mixed solution 1;

[0051] 2) Dissolving 0.1 mmol of palladium chloride powder in 5 ml of hydrochloric acid solution with a concentration of 0.1 mol / L, heated to 90 degrees Celsius to dissolve, and obtained mixed solution 2;

[0052] 3) Add the mixed solution 2 to the mixed solution 1, and stir at 95 degrees Celsius for 15 minutes to obtain the mixed solution 3;

[0053] 4) Add 6 ml of ascorbic acid with a concentration of 1.0 mol / L to the mixed solution 3, and stir rapidly at 95 degrees Celsius for 5 hours;

[0054] 5) The obtained product is separated by a centrifuge, firstly dispersed in deionized water and then ultrasoni...

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Abstract

The invention discloses a CuPd alloy nanocrystal preparation and component regulation and control method, and a synthesis method mainly comprises the following steps: preparing soluble copper salt, adding potassium chloride powder, and uniformly stirring in a high-temperature environment to obtain a mixture 1; dissolving palladium chloride powder in a hydrochloric acid solution at a high temperature, and adding the solution into the mixture 1; and adding an ascorbic acid solution, and carrying out high-temperature stirring reaction for 5-6 hours. The component regulation and control method comprises the step of regulating the dosage of hydrochloric acid and palladium chloride powder in a reaction solution to control the atomic percent of Cu and Pd in the alloy. The method takes water as a solvent, is carried out without gas protection, is simple in operation scheme, and does not add an organic surfactant in synthesis. The component regulation and control method provides a wider space for the application of the CuPd alloy nanocrystals.

Description

technical field [0001] The invention relates to the technical field of metal nanomaterial preparation, in particular to a method for preparing CuPd alloy nanocrystals and controlling components thereof. Background technique [0002] In recent years, the excellent application performance of metal Pd in ​​proton exchange membrane fuel has attracted the attention of many scholars. However, due to the high market price, the further industrial application of Pd is seriously restricted. The development of CuPd alloy nanocrystals as a substitute can effectively reduce the use of precious metals. At the same time, the tunable d-band center and the synergistic effect of bimetals provide a broader space for the application of CuPd alloy nanocrystals (such as electrocatalytic carbon dioxide reduction and other important fields). [0003] For nanomaterials with high specific surface energy, the traditional processes of high temperature and annealing in alloy preparation are not applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00Y02E60/50
Inventor 刘欣美李雪杨文龙周雪李宇航李东平
Owner HARBIN UNIV OF SCI & TECH
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