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High-platinum base-loaded carbon nano tube nanocatalyst and preparation method thereof

A carbon nanotube, multi-walled carbon nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the anti-poisoning ability of catalytic oxidation of carbon monoxide is not significantly improved, and platinum nanoparticles are stable. It can improve the anti-poisoning ability, reduce the cost of catalyst and improve the utilization rate.

Inactive Publication Date: 2016-06-08
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The mass activity of its catalytic oxidation of methanol is 3.9 times that of commercial platinum-carbon catalysts, but its anti-poisoning ability for catalytic oxidation of carbon monoxide is not significantly improved compared with commercial platinum-carbon catalysts, and the stability of the dispersed platinum nanoparticles is not very good

Method used

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  • High-platinum base-loaded carbon nano tube nanocatalyst and preparation method thereof
  • High-platinum base-loaded carbon nano tube nanocatalyst and preparation method thereof
  • High-platinum base-loaded carbon nano tube nanocatalyst and preparation method thereof

Examples

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Embodiment 1

[0045] Embodiment 1: the preparation of multi-walled carbon nanotube loaded high load platinum nanocatalyst Pt / MWCNTs (the weight percent of platinum in platinum and multi-walled carbon nanotube is 91%)

[0046] (1) Disperse multi-walled carbon nanotubes (MWCNTs) in toluene, add azobisisobutyronitrile, pass through nitrogen, react in an oil bath at 75 degrees Celsius for more than 4 hours, cool and filter, and then disperse in sodium hydroxide The aqueous solution was stirred in an oil bath at 70 degrees Celsius for more than 48 hours. Finally, the reaction solution is filtered and washed, dried and ground to obtain carboxylated multi-walled carbon nanotubes for subsequent use;

[0047] (2) H 2 PtCl 6 ·6H 2 O, the carboxylated multi-walled carbon nanotubes and ethylene glycol in step (1) were stirred at room temperature for more than 30 minutes to fully disperse them, and continued to sonicate. By alternately using agitation and ultrasound, a highly dispersed solution-like...

Embodiment 2

[0060] Example 2: Multi-walled carbon nanotubes loaded with high-load platinum-copper catalyst PtCu 3 Preparation of / MWCNTs (the weight percentage of platinum in platinum, copper and multi-walled carbon nanotubes exceeds 90%)

[0061] (1) H 2 PtCl 6 ·6H 2 O, CuSO 4 ·5H 2 O, carboxylated multi-walled carbon nanotubes 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. At the same time, metal Pt accounts for more than 90% of the weight of carbon, Cu and Pt;

[0062] (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;

[0063] (3) Continue to alternately use ultrasound and stirring the mixed solution obtained in step (2) until a solution-like dispersion is formed;

[0064] (4) Put the mixed solution obtained in step (3) into a microwave reactor, ventilate nit...

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Abstract

The invention relates to a platinum-based metal-loaded carbon nano tube catalyst for fuel cells and a preparation method and application of the catalyst. According to the catalyst, a multi-wall carbon nano tube is taken as a carbon nano tube, and the loading quantity of platinum-based metal on the carbon nano tube is more than 80%. The catalyst has the advantages that the particle size of active components is as small as about 2.0-4 nm, the active components are evenly distributed on the carbon nano tube, platinum-based nanoparticles are connected into a network structure, the precious metal utilization rate is high, the properties such as the catalytic activity, the life and the carbon monoxide poisoning resistance of the catalyst are high, and the activity of the catalyst for catalyzing and oxidizing methyl alcohol is 4 times or above of that of a commercial Pt-C catalyst.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to a carbon nanotube high-loaded platinum-based nanocatalyst 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, the most prominent of which are the high price of catalysts, low natural reserves, and short lifespan. For fuel cells using reformed gas as fuel, there is also the problem that the catalyst is easily poisoned and deactivated. These problems are closely related to the performanc...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8825H01M4/926Y02E60/50
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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