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Upright few-layer graphene-metal nanoparticle composite catalytic electrode

A technology of metal nanoparticles and few-layer graphene, applied in the field of electrochemistry, can solve the problems of difficulty in controlling the size and shape of nanoparticles, complicated preparation steps, etc., achieve good and stable physical and chemical properties, simple preparation steps, and large pores content effect

Active Publication Date: 2019-12-10
SHENZHEN YICK XIN TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the connection process of graphene and metal nanoparticles, commonly used methods include in-situ reduction method, organic modification method, electrochemical deposition method, etc., but these methods have shortcomings, and the in-situ reduction method can only obtain single-component nanoparticles. , the preparation steps of the organic modification method are complicated, and the size and shape of the nanoparticles in the electrochemical deposition are difficult to control, etc.

Method used

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  • Upright few-layer graphene-metal nanoparticle composite catalytic electrode
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  • Upright few-layer graphene-metal nanoparticle composite catalytic electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, vertical few-layer graphene has a unique morphology: carbon nanosheets grow vertically and have a large surface area. figure 2 It is revealed that the edge thickness is between 0.34 and 0.37 nm, and it is a graphene structure with one to two layers. image 3 It shows that the size and shape of platinum particles are uniform, and the average diameter is about 2 nanometers.

[0038] A kind of preparation method of upright few-layer graphene-metal nanoparticle composite catalytic electrode, comprises the following steps at least:

[0039] In the first step, put the high-conductivity carbon paper into the vacuum chamber of the plasma chemical vapor deposition device, feed the reducing gas hydrogen and argon at 1:1, and maintain the low pressure state in the device through flow adjustment, so that the vacuum degree is stable at 15Pa, perform plasma etching reaction on the substrate, the reaction time is 10min, and the power density of the plasma...

Embodiment 2

[0047] Different from Example 1 is the preparation method and application of gold nanoparticles on the surface of upright graphene, the method at least includes the following steps:

[0048] The first step is to select a gold target and place the material prepared in the first step to the third step in Example 1 in a physical vapor deposition device, and vacuumize to 3x10 -3 Pa, filled with argon to stabilize the pressure at 5pa, start magnetron sputtering, where the power is 5W / cm 2 , time 300s;

[0049] In the second step, after the magnetron sputtering is finished, flush argon to 1x10 5 Pa, raise the temperature to 450°C and keep it for 40min for annealing;

[0050] In the third step, after the annealing reaction is completed, the temperature in the equipment drops to room temperature, and the sample is taken out;

[0051] After testing, in this embodiment, gold nanoparticles with a particle diameter of about 13 nm are loaded on the upright graphene. Differential pulse ...

Embodiment 3

[0053] Different from Examples 1 and 2 are the preparation method and application of the silver nanoparticles on the surface of the upright graphene, the method at least includes the following steps:

[0054] The first step is to select a silver target and place the material prepared in the first step to the third step in Example 1 in a physical vapor deposition device, and vacuumize to 2x10 -3 Pa, filled with argon to stabilize the pressure at 5.2pa, start magnetron sputtering, the power is 4W / cm 2 , time 240s;

[0055] In the second step, after the magnetron sputtering is finished, flush argon to 1x10 5 pa, raise the temperature to 250°C and keep it for 30min for annealing;

[0056] In the third step, after the annealing reaction is completed, the temperature in the equipment drops to room temperature, and the sample is taken out.

[0057] After testing, in this embodiment, the vertical graphene supports nano-silver particles with a particle diameter of about 5 nm. Weigh...

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Abstract

The invention discloses a substance structure taking metal nanoparticle modified upright few-layer graphene as a nano-electrode and a preparation method of the substance structure. Upright few-layer graphene is called upright graphene for short, is obviously different from other carbon materials, and has the characteristic of great available surface. The metal nanoparticles are uniformly distributed on the surface of the upright graphene through a physical vapor deposition method, the average diameter of the particles can be controlled within the range of 0.5-100 nanometers, the coverage ratecan be controlled within 0-100%, and the particles are connected with the surface of the graphene through chemical bonds, so that the adhesive force is high, and the conductivity is good. The particles can be gathered at the edge of the graphene. The nanoelectrode has the advantages of improving the utilization rate of noble metal and increasing the catalytic efficiency, so that the noble metal consumption and the industrial cost are greatly reduced. The preparation method is energy-saving, efficient, quick and cheap, is suitable for mass production, and can be widely applied to electrochemistry, analytical chemistry, biochemistry, medical treatment, environment and energy related industries.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to an upright few-layer graphene-metal nanoparticle composite catalytic electrode with catalytic activity. Background technique [0002] Since vertical few-layer graphene was successfully prepared in 2003, this star material has attracted people's attention because of its special structure, easy industrial production and excellent performance. This material, which grows directly on the surface of the substrate without a binder, has a huge specific surface area and micro-mechanical strength. According to the needs, only simple treatment such as plasma bombardment or ultraviolet irradiation is required, and the vertical few-layer graphene can overcome the disadvantage of insufficient hydrophilicity on the basis of maintaining excellent electrical conductivity. Studies have shown that graphene-metal composite electrodes have broad application prospects, such as in catalysis...

Claims

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Application Information

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IPC IPC(8): B81B7/02B81C1/00
CPCB81B7/02B81C1/00349B81C1/00373
Inventor 郑伟恩瑞克赵鑫
Owner SHENZHEN YICK XIN TECH DEV CO LTD
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