Method of one-step synthesis of cluster type palladium-copper nano particles and application of cluster type palladium-copper nano particles

A nanoparticle and cluster technology, applied in nanotechnology, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the complex process of core-shell growth method, uneven particle size, nanoparticle Small particle size and other problems, to achieve the effect of improving the oxidation activity and stability of formic acid

Inactive Publication Date: 2018-10-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of the microemulsion reaction is that it is convenient and quick, but the disadvantage is that the particle size of the obtained nanoparticles is small; because when the particle size increases to a critical value, the reaction mechanism will be more complicated under the influence of chemical kinetics, making the particle shape Different, uneven particle size
The process of the core-shell growth method is relatively complicated, and the obtained catalyst is prone to core-shell separation due to its two-layer or even multi-layer structure.

Method used

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  • Method of one-step synthesis of cluster type palladium-copper nano particles and application of cluster type palladium-copper nano particles
  • Method of one-step synthesis of cluster type palladium-copper nano particles and application of cluster type palladium-copper nano particles
  • Method of one-step synthesis of cluster type palladium-copper nano particles and application of cluster type palladium-copper nano particles

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Embodiment 1

[0019] The present embodiment provides a method for synthesizing cluster-type palladium-copper nanoparticles in one step, which comprises the following steps:

[0020] Put a magnetic stir bar into the round bottom flask, add 40ml DMF (N,N-dimethylformamide), then add 0.1g PVP (polyvinylpyrrolidone, commercially available), start stirring to dissolve; add 0.03g Pd(acac) 2 , 0.005g Cu(acac) 2 Make the solution change from colorless to yellow-green. At this time, install a condenser, open the circulating condensed water, and stir fully to fully dissolve and mix evenly;

[0021] Immerse the round-bottomed flask in an oil bath and heat it to 100°C for reaction, keeping it for 10-18 hours (during this process, it can be observed that the color of the solution gradually becomes darker and finally turns black); after 18 hours, stop heating and stirring, and place the round-bottomed flask in a It can be cooled at room temperature; the obtained cluster type palladium copper nanopartic...

Embodiment 2

[0023] This embodiment provides a method for synthesizing cluster-type palladium-copper nanoparticles in one step, which is basically the same as that in Example 1, except that 0.03g Pd(acac) is added 2 and 0.015g Cu(acac) 2 .

Embodiment 3

[0025] This embodiment provides a method for synthesizing cluster-type palladium-copper nanoparticles in one step, which is basically the same as that in Example 1, except that 0.03g Pd(acac) is added 2 and 0.03g Cu(acac) 2 .

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Abstract

The invention relates to a method of one-step synthesis of cluster type palladium-copper nano particles and application of the cluster type palladium-copper nano particles. The method comprises the following steps that polyvinylpyrrolidone is dissolved in an organic solvent, and Pd(acac)2 and Cu(acac)2 are added under the condition of continuous stir so that a colorless solution is turned into a yellow green solution; then the solution conducts a reaction at the temperature ranging from 100 DEG C to 150 DEG C until the solution is blackened, and cooling is conducted to enable the temperature to be equal to the room temperature; and the mass ratio of polyvinylpyrrolidone to Pd(acac)2 to Cu(acac)2 is 12-17:5-6:4-6. In this way, the oxidation activity and the stability of formic acid can be improved, and compared with the performance of commercial Pd/C, the performance of formic acid is remarkably improved. In addition, the shapes of the synthetic nano particles can be regulated and controlled by changing the concentration of copper ions.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a method for synthesizing cluster-type palladium-copper nanoparticles in one step and the application of the cluster-type palladium-copper nanoparticles. Background technique [0002] Fuel cell is a kind of green energy, and direct formic acid fuel cell (DFAC) is expected to be one of the most promising green energy because of its excellent characteristics such as high energy conversion efficiency, high energy density, and rapid start-up at room temperature. At the same time, formic acid also has many advantages, for example, it is easily soluble in water and is a good electrolyte; it has low toxicity and can be used as a food additive; chemical reaction. However, the bottleneck encountered by current fuel cells is the low efficiency of traditional commercial Pd / C catalysts and the large amount of Pd used, which makes the slow catalytic reaction on the electrode an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B01J35/02B01J35/00B01J23/89B82Y40/00
CPCB82Y40/00B01J23/8926B01J35/0033B01J35/023B22F9/24B22F1/0553B22F1/07B22F1/054
Inventor 江林曾华杰
Owner SUZHOU UNIV
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