Foam metal-carbon nanotube composite material, and preparation method and application thereof

A foam metal, carbon nanotube technology, applied in the direction of carbon nanotubes, metal material coating process, nano carbon, etc., can solve the problem of uneven distribution of carbon nanotubes, and achieve controllable and uniform diameter and good dispersion. Effect

Active Publication Date: 2015-08-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN103434207A discloses a metal foam-carbon nanotube composite material and its preparation method, but this method is obtained through the electrodeposition of existing carbon nanotubes, which has the disadvantage of uneven distribution of carbon nanotubes. In-Situ Generation of Carbon Nanomaterials on Metal Foam

Method used

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  • Foam metal-carbon nanotube composite material, and preparation method and application thereof
  • Foam metal-carbon nanotube composite material, and preparation method and application thereof
  • Foam metal-carbon nanotube composite material, and preparation method and application thereof

Examples

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Embodiment 1

[0034] Divide the area into 5×5cm 2 The polyurethane sponge (weight is 110mg) carries out pretreatment. That is, after chemical degreasing (NaOH: 15g / L, NaOH: 3 PO 4 : 15g / L, Na 2 CO 3 :10g / L, 35℃, 4min), deionized water washing, potassium permanganate roughening (KMnO 4 :6g / L, H 2 SO 4 : 12mL / L, room temperature, 3min), deionized water washing, oxalic acid reduction (C 2 h 2 o 4 : 15g / L, room temperature, 2min), deionized water washing, sensitization (SnCl 2 :25g / L, HCl:40mL / L, room temperature, 3min) and colloidal palladium activation (PdCl 2 : 0.5g / L, HCl: 40mL / L, room temperature, 4min). After pretreatment, electroless nickel plating (NiSO 4 :30g / L, NaH 2 PO 2 : 10g / L, Na 3 Cyt: 35g / L, Na 3 PO 4 : 50g / L, 45 DEG C, 1.5h), make polyurethane sponge substrate surface coating nickel foam to obtain the foam nickel catalyst of polyurethane sponge substrate, weigh after drying and obtain gross mass be 185mg, wherein foam nickel 75mg, account for polyurethane spong...

Embodiment 2

[0037] The pretreatment steps of the polyurethane sponge of the present embodiment are exactly the same as that of Example 1. After pretreatment, electroless copper plating (CuSO 4 : 10g / L, Na 3 Cyt: 24g / L, NiSO 4 :3g / L, H 3 BO 3 : 30g / L, NaOH: 10g / L, NaH 2 PO 2 : 30g / L, 60 ℃, 1h), make polyurethane sponge substrate surface coating foam copper catalyst obtain the foam copper catalyst of polyurethane sponge substrate, weigh after drying and obtain gross mass be 160mg, wherein foam copper 50mg, account for polyurethane sponge substrate quality 45%.

[0038] Put the foamed copper catalyst of the polyurethane sponge substrate above in a tube furnace, pass nitrogen protection, then raise the temperature of the tube furnace from room temperature to 550 ° C at a heating rate of 15 ° C / min, feed hydrogen and keep it for 1 hour ; The temperature was raised to 800°C at a heating rate of 15°C / min, and 10% acetylene gas mixture (nitrogen: acetylene=1:9, volume ratio) was introduc...

Embodiment 3

[0040] The pretreatment steps of the polyurethane sponge of the present embodiment are exactly the same as that of Example 1. After pretreatment, the polyurethane sponge was electrolessly plated with cobalt (CoSO 4 :28g / L, NaH 2 PO 2 : 25g / L, Na 3 Cyt: 60g / L, H 3 BO 3 : 30g / L, 80 DEG C, 0.5h), the cobalt foam catalyst that makes polyurethane sponge substrate surface coating foam cobalt obtains polyurethane sponge substrate.

[0041] Put the foamed cobalt catalyst of the polyurethane sponge substrate above in a tube furnace, protect it with nitrogen, then raise the temperature of the tube furnace from room temperature to 500 °C at a rate of 12 °C / min, feed hydrogen and keep it for 1 hour ; The temperature was raised to 600°C at a heating rate of 10°C / min, and 10% acetylene gas mixture (nitrogen: acetylene=1:9, volume ratio) was introduced at a rate of 50mL / min as a carbon source, Carbon nanofibers were grown by chemical vapor deposition on the surface of the cobalt cataly...

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Abstract

The invention belongs to the technical field of nano materials, and discloses a foam metal-carbon nanotube composite material, and a preparation method and application thereof. The preparation method comprises the steps of pretreating a polyurethane sponge substrate, then putting the pretreated polyurethane sponge substrate in a chemical plating solution containing metallic elements to perform a chemical plating reaction, and drying the obtained product to obtain a foam metal catalyst with the polyurethane sponge substrate; then putting the foam metal catalyst in a tube furnace, heating the furnace to 500-550 DEG C, and feeding hydrogen for 0.5-2 hours; heating the furnace up to 600-800 DEG C, feeding an acetylene mixed gas to be used as a carbon source, and growing carbon nano material on the surface of the foam metal catalyst through chemical vapor deposition so as to obtain the foam metal-carbon nanotube composite material. According to the preparation method provided by the invention, carbon nanofibers or carbon nanotubes grow in-situ on the surface of a transition metal catalyst, so that the combination at the metal / carbon interface is tight, the carbon nanofibers or carbon nanotubes have good dispersity, and the tube diameters are controllable and uniform.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a metal foam-carbon nanotube composite material and its preparation method and application. Background technique [0002] Carbon black is the most commonly used carrier for fuel cell electrocatalysts, consisting of spherical particles with a particle size of 50-100 nm. Due to the small particle size and zero-dimensional structure, it is easy to agglomerate and corrode under the working conditions of the fuel cell, resulting in a decrease in catalyst activity. One-dimensional carbon nanofibers or carbon nanotubes have a large aspect ratio. After adjustment, a large specific surface area and a high degree of graphitization can be obtained, so they are especially suitable as anti-agglomeration and corrosion-resistant fuel cell electrocatalyst supports. . Moreover, carbon nanofibers or carbon nanotubes themselves can act as oxygen reduction catalysts. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/90C23C16/26C01B32/16H01M4/9041H01M4/9083Y02E60/50Y10S977/742Y10S977/843Y10S977/948B82Y40/00C01B2202/22C01B32/162H01M4/8657H01M4/96
Inventor 曾建皇李目武
Owner SOUTH CHINA UNIV OF TECH
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