An upright few-layer graphene-metal nanoparticle composite catalytic electrode

A metal nanoparticle, few-layer graphene technology, applied in the field of electrochemistry, can solve the problems of difficult to control the size and morphology of nanoparticles, complicated preparation steps, etc., achieve good and stable physical and chemical properties, simple preparation steps, size and shape. controllable effect

Active Publication Date: 2020-09-08
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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  • An upright few-layer graphene-metal nanoparticle composite catalytic electrode
  • An upright few-layer graphene-metal nanoparticle composite catalytic electrode
  • An 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] In the first step, the gold target is selected, and the material prepared in the first step to the third step in Example 1 is placed in a physical vapor deposition device, and the vacuum is evacuated to 3×10 -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 graphe...

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 2×10 -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, argon gas is injected to 1×10 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 ...

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Abstract

Disclosed is an upright few-layer graphene-metal nanoparticle composite catalytic electrode, comprising: a conductive substrate, upright few-layer graphene layers, and metal nanoparticles. The present invention also relates to a preparation method for the composite catalytic electrode. The composite catalytic electrode has high effective surface area and metal utilization, and greatly reduces the amount of a precious metal and industrial costs. The preparation method compounds nanoparticles by means of a magnetron sputtering method, and has simple and convenient preparation steps, the size morphology of the metal particles is controllable, and the purity is high.

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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Patent Type & Authority Patents(China)
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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