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Preparation method of platinum/vertical graphene composite material electrocatalyst

A technology of vertically oriented and composite materials, which is applied in the field of electrocatalyst preparation of vertically oriented graphene-supported platinum nanoparticle composite materials, can solve problems such as complex process, and achieve the effects of increasing deposition amount, improving catalytic performance, and improving purity.

Inactive Publication Date: 2013-04-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method confirms that non-agglomerated graphene can be used as an excellent carrier to realize the catalytic performance of nanomaterials, but the process is relatively complicated and is still in the laboratory research stage

Method used

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  • Preparation method of platinum/vertical graphene composite material electrocatalyst
  • Preparation method of platinum/vertical graphene composite material electrocatalyst
  • Preparation method of platinum/vertical graphene composite material electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Arrange the substrate and the needle electrode in the quartz tube, the needle electrode is arranged along the axis of the quartz tube and perpendicular to the substrate, the distance between the substrate and the needle electrode is 10 mm, the substrate is grounded, the needle electrode is connected to 10000 V DC high voltage, and the outside of the quartz tube Wrap the heating wire, the air outlet is open. The inlet of the quartz tube is fed with hydrogen gas, the electric heating is turned on, and the substrate is heated to 700 o c. Keep the electric heating, turn off the hydrogen, feed methane, argon and water vapor from the inlet of the quartz tube, turn on the DC high voltage, generate a local enhanced electric field on the large curvature surface of the needle electrode, and form a normal pressure between the substrate and the needle electrode The glow discharge plasma makes methane and water vapor ionized and decomposed under the action of plasma high-energy ele...

Embodiment 2

[0033] Repeat Example 1, the difference is only: the distance between the substrate and the needle-shaped electrodes is 5 mm, and the heating temperature of the substrate is 1000 o C, a constant voltage of -0.2 V was applied for 1 s. The scanning electron microscope image of the resulting platinum / vertically oriented graphene composite electrocatalyst is shown in figure 2 shown.

Embodiment 3

[0035] Repeat Example 1, the difference is only: the distance between the substrate and the needle electrode is 8 mm, and the substrate heating temperature is 900 o C, a constant voltage of -0.1 V was applied for 20 s. The scanning electron microscope image of the resulting platinum / vertically oriented graphene composite electrocatalyst is shown in image 3 shown.

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Abstract

The invention discloses a preparation method of a platinum / vertical graphene composite material electrocatalyst. The preparation method comprises the following steps: growing a vertical graphene nano sheet through constant voltage direct-current normal glow discharge plasma enhanced chemical vapor deposition; depositing platinum nano grains on the surface of the vertical graphene nano sheet through a electrochemical deposition method in a mode that the vertical graphene nano sheet is used as a carrier; and drying so as to obtain the vertical graphene composite material electrocatalyst. The vertical graphene composite material electrocatalyst prepared by using the plasma enhanced chemical vapor deposition method has no conspicuous graphene agglomeration phenomenon, the distance is controllable, the superficial area can be effectively utilized, and the deposition quantity of a nano catalyst of the carrier in unit volume is increased.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and relates to a method for preparing a vertically oriented graphene-loaded platinum nanoparticle composite material electrocatalyst based on normal-pressure DC plasma. Background technique [0002] Compared with other fuel cells, direct methanol fuel cell (DMFC) has a simple structure and small size. At the same time, the storage, transportation and use of methanol fuel are safe and convenient, and it is easy to make a portable power supply. It is used in small household appliances such as cameras, notebooks, mobile phones, etc. , showing good application prospects. At present, a lot of international research is devoted to the development of high-efficiency catalyst supports to improve catalyst activity and efficiency, including graphene, a two-dimensional carbon nanomaterial. Graphene can be regarded as a single-layer carbon atom material exfoliated from graphite sp 2 Hexagon...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J37/34H01M4/92
CPCY02E60/50
Inventor 薄拯岑可法严建华王智华池涌吴尔卡
Owner ZHEJIANG UNIV
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