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Platinum-based nanoparticle coating and tin dioxide covering carbon nanotube and preparation method thereof

A technology of carbon nanotubes and tin dioxide, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of unsatisfactory stability and anti-poisoning ability, so as to improve the ability of anti-carbon monoxide poisoning, improve the utilization rate, and improve the anti-poisoning ability. The effect of the poison ability

Active Publication Date: 2017-05-31
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its quality, activity, stability and anti-poisoning ability are still not ideal, and its performance needs to be further improved.

Method used

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  • Platinum-based nanoparticle coating and tin dioxide covering carbon nanotube and preparation method thereof
  • Platinum-based nanoparticle coating and tin dioxide covering carbon nanotube and preparation method thereof
  • Platinum-based nanoparticle coating and tin dioxide covering carbon nanotube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Example 1: Platinum-based nanoparticles coated tin dioxide-covered carbon nanotubes (MWCNTs@SnO 2 @Pt, preparation of 86% by weight platinum in platinum, tin dioxide and multi-walled carbon nanotubes)

[0049] (1) Dispersing multi-walled carbon nanotubes (MWCNTs) in concentrated nitric acid, reacting in an oil bath at 140 degrees Celsius for more than 10 hours, cooling and filtering, drying and grinding to obtain functionalized multi-walled carbon nanotubes for use;

[0050] (2) SnCl 2 2H 2 O, urea, the functionalized multi-walled carbon nanotubes of step (1) and water are stirred at room temperature for more than 30 minutes to fully disperse them, and continue to sonicate to obtain a highly dispersed solution-like mixture. Then reflux and stir in an oil bath at 90 degrees centigrade for 10 hours, then cool and filter. A material in which carbon nanotubes are covered with tin dioxide is obtained.

[0051] (3) put H 2 PtCl 6 ·6H 2 O and step (2) gained tin dioxide...

Embodiment 2

[0064] Example 2: Platinum-copper core-shell nanoparticles coated carbon nanotubes covered with tin dioxide (MWCNTs@SnO 2 Preparation of @Pt-Cu@Pt)

[0065] (1) H 2 PtCl 6 ·6H 2 O, CuSO 4 ·5H 2 O, multi-walled carbon nanotubes covered with tin dioxide and ethylene glycol were stirred at room temperature for 30 minutes to fully disperse them. The molar ratio of Pt and Cu in the mixed solution is 1:3;

[0066] (2) the mixed solution obtained in step (1) is alternately used to stir and sonicate, and then adjust its pH value to 10 with sodium hydroxide ethylene glycol solution;

[0067] (3) Continue to alternately use ultrasound and stirring the mixed solution obtained in step (2) until a solution-like dispersion is formed;

[0068] (4) Put the mixed solution obtained in step (3) into a microwave reactor, pass through nitrogen to deoxygenate, simultaneously pass on condensed water, and stir for 30 minutes;

[0069] (5) microwave the solution obtained in step (4) for more tha...

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Abstract

The invention relates to a platinum-based nanoparticle coating and tin dioxide covering carbon nanotube and a preparation method thereof, wherein the carbon nanometer tube is a multi-wall carbon nanotube; a layer of tin dioxide is loaded on the carbon nanotube; a layer of platinum-based metal is loaded on the tin dioxide layer; the platinum-based metal exists in a nanometer particle form, and is connected into a network structure. The catalyst provided by the invention has the advantages that the noble metal utilization rate is high; the catalytic activity and the carbon monoxide poisoning resistance performance of the catalyst are high; the service life of the catalyst is long; the methanol catalytic oxidation activity is more than 6.2 times of the commercial Pt / C catalyst; the oxygen reduction mass activity at the hydrogen scale potential being 0.9V is 9.6 times of that of the commercial Pt / C catalyst; the granularity is preferably between 1.0 to 10.0nm, and is also preferably between 2.0 to 4.0nm.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to carbon nanotubes coated with tin dioxide and platinum-based nanoparticles for fuel cells and a preparation method thereof. Background technique [0002] A fuel cell is a device that can directly convert the chemical energy of fuel into electrical energy efficiently and cleanly, and is an ideal power generation technology. Due to the broad application prospects of fuel cells in vehicle power sources, various mobile power sources, military power sources, etc., the research of fuel cells has been highly valued by various countries. [0003] At present, some problems are encountered in the commercialization of fuel cells, among which the most prominent are the high price of catalysts, less natural reserves, low activity and short life. For fuel cells using reformed gas as fuel, there is also the problem that the catalyst is easily poisoned and deactivated. These problems are clos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/88H01M4/926Y02E60/50
Inventor 官轮辉黄美华
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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