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Method of depositing high density loading metal platinum on carbon nanometer pipe surface using oriented chemistry

A carbon nanotube and metal-loaded technology, applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problems of limited prospects, low loading rate, high cost, etc., and achieve excellent performance, uniform distribution, high platinum The effect of load ratio

Inactive Publication Date: 2005-01-05
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method can realize the self-assembly of nano-metal particles on the surface of carbon nanotubes, but the method is cumbersome, the requirements for reaction conditions are relatively strict, the cost is high, and the loading rate is low, especially if the carbon nanotubes and noble metal nanoparticles are used Coupled molecules containing sulfur atoms can poison the catalytic reaction, so this type of method has limited prospects for application in the preparation of catalysts

Method used

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  • Method of depositing high density loading metal platinum on carbon nanometer pipe surface using oriented chemistry
  • Method of depositing high density loading metal platinum on carbon nanometer pipe surface using oriented chemistry
  • Method of depositing high density loading metal platinum on carbon nanometer pipe surface using oriented chemistry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: 1) surface oxidation treatment of nanotubes: 1 gram of purified single-walled carbon nanotubes (provided by the Metal Institute of the Chinese Academy of Sciences) or multi-walled carbon nanotubes (provided by the Department of Chemistry, Xiamen University) was added to a round bottom flask, and then Add 200 ml of 2.6M nitric acid, heat to boil, reflux for about 4 hours, then filter, wash with water until neutral, and dry at 150°C for 2 hours to obtain a surface oxidized carbon nanotube sample for future use.

[0015] 2) Nanotube-supported platinum nanoparticles: add 0.1 g of carbon nanotubes after surface oxidation treatment, 0.1 g of dodecyltrimethylammonium bromide, 0.1 g of chloroplatinic acid and 1000 ml of ethylene glycol in a round bottom flask , After ultrasonic dispersion, the round bottom flask was placed in an oil bath, heated and stirred, and the reaction was stopped after 2 hours of reaction.

[0016] 3) The product was centrifuged, washed wit...

Embodiment 2～8

[0020] The method for loading platinum nanoparticles on nanotubes is the same as in Example 1, and the remaining conditions and results are shown in Table 1:

[0021] Reality

apply

example

carbon nanotubes

A

Surfactant

B

Platinum salt

C

warm

Spend

(℃)

reaction

time

(Small

Time)

Ethylene Glycol

Platinum loading

Rate

(%)

Platinum

Grain

Average ruler

Inch

(nm)

kind

kind

content

(gram)

kind

kind

contains

quantity

(gram)

kind

kind

contain

quantity

(gram)

1

A1

0.1

B1

0.1

C1

0.1

170

2

1000mL

50

5

2

A1

10

B2

5

C2

2.5

130

1.5

1000mL

20

3

3

A1

9

B5

10

...

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Abstract

A process for carrying high-density Pt on the surface of carbon nanotube by directional chemical deposition features that the carbon nanotubes, platium chloride and surfactant take part in reaction in polyol to obtain a catalyst used for oxidization reaction of methanol with high electrocatalytic performance.

Description

technical field [0001] The invention relates to a new method for supporting metal platinum on the surface of carbon nanotubes through directional chemical deposition. Background technique [0002] Since the discovery of carbon nanotubes by Iijima in 1991, due to their unique structure, excellent optical, electrical, magnetic and mechanical properties, carbon nanotubes have attracted extensive research interest. The application of carbon nanotubes has involved composite materials , field emission display, scanning microprobe tips, nanoelectronic devices, hydrogen storage and catalyst supports and other fields (Baughman R.H., et al, Science, 2002, 297: 787). Since carbon nanotubes are one-dimensional materials with a high length-to-diameter ratio (within tens of nanometers in diameter and a few micrometers to hundreds of micrometers in length) and a hollow structure, they can be used as templates to prepare novel one-dimensional materials. Dimensional composite materials. Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J35/02B01J37/02
Inventor 林昌健王宇陈营
Owner XIAMEN UNIV
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