Single metal/multi-wall carbon nano tube type composite material, preparation method and application thereof

A multi-walled carbon nanotube, metal element technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc. Unable to achieve uniform distribution and controllable particle size, etc., to achieve the effect of overcoming uneven dispersion and improving anti-poisoning ability

Inactive Publication Date: 2010-09-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for creation of high quality composites that combine different types of components together without causing damage or reducing their effectiveness. These compositions have uniform distribution of noble metallic elements throughout them due to strong bonds between the individual layers within each component's structure. They provide improved antispyrosis capabilities compared to existing methods such as coating with protective agents like silver nitrate.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency and effectiveness of solid state hydrogen generators with improved emissions control capabilities while reducing harmful exhaust gas emission levels associated therewith. Current solutions involve expensive platinum group materials like palladium, ruthenium, cobalt, nickel, tantaluminum, manganese dioxide, tungsten carbons, graphite, bismuth sulfate ceramics, and other suitable materials. However, current methods require complicated processes involving multiple steps and may result in poor quality product consistency over time.

Method used

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  • Single metal/multi-wall carbon nano tube type composite material, preparation method and application thereof
  • Single metal/multi-wall carbon nano tube type composite material, preparation method and application thereof
  • Single metal/multi-wall carbon nano tube type composite material, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1.8626gCo(NO 3 ) 2 ·6H 2 O and 1.2004gAl(NO 3 ) 3 9H 2 O was prepared into 80mL salt solution, and then 2.3063g urea was added to make a mixed solution.

[0031] Put the above solution into a 100ml polytetrafluoroethylene resin liner, put it into a miniature autoclave to seal it, put the kettle into an oven for crystallization at 150°C for 24 hours, take out the liner after cooling, and take out the reactant , filtered with suction, washed twice with deionized water, and dried at 70°C for 15 hours.

[0032] Put the LDH precursor prepared above into a muffle furnace, raise the temperature to 700°C at a heating rate of 5°C / min, and keep it at 700°C for 120 minutes to obtain the corresponding roasted products, wherein the roasted products are cobalt oxide and cobalt aluminum spinel.

[0033] Spread 43 mg of the roasted product prepared above in a porcelain boat, put the porcelain boat into a horizontal quartz tube located in a tubular heating furnace, feed in nitrog...

Embodiment 2

[0037] 0.9313gCo(NO 3 ) 2 ·6H 2 O, 0.8205gMg(NO 3 ) 2 ·6H 2 O and 1.2004gAl(NO 3 ) 3 9H 2 O was prepared into 80mL salt solution, and then 2.3063g urea was added to make a mixed solution.

[0038] Put the above mixed solution into a 100ml polytetrafluoroethylene resin liner, put it into a miniature autoclave to seal, put the still in an oven for crystallization at 100°C for 15 hours, take out the liner after cooling, and take out The reactant was suction filtered, washed twice with deionized water, and dried at 70°C for 15 hours.

[0039] Put the LDH precursor prepared above into a muffle furnace, raise the temperature to 700°C at a heating rate of 5°C / min, and keep it at 700°C for 120 minutes to obtain the corresponding roasted products, wherein the roasted products are cobalt oxide, oxide Magnesium and cobalt aluminum spinel.

[0040] Spread 48 mg of the roasted product prepared above in a porcelain boat, put the porcelain boat into a horizontal quartz tube located...

Embodiment 3

[0044] Weigh 3.7252g Co(NO 3 ) 2 ·6H 2 O and 2.4008gAl(NO 3 ) 3 9H 2 O was dissolved in 160ml deionized water to make a mixed salt solution, and then weighed 1.5361gNaOH and 1.6962gNaOH 2 CO 3 Make a mixed alkali solution, put the mixed salt solution in a 500mL three-necked flask, add the mixed alkali solution to the salt solution drop by drop under constant stirring until pH = 10, and age the mixture in a water bath at 60°C for 6 hours , after the reaction was completed, suction filtered, washed with deionized water until neutral, and dried at 70°C for 20 hours.

[0045] Put the LDH precursor prepared above into a muffle furnace, raise the temperature to 700°C at a heating rate of 5°C / min, and keep it at 700°C for 120 minutes to obtain the corresponding calcined products, wherein the calcined products are cobalt oxide and sharp spar.

[0046] Spread 75 mg of the roasted product prepared above in a porcelain boat, put the porcelain boat into a horizontal quartz tube lo...

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Abstract

The invention provides a single metal/multi-wall carbon nano tube type composite material, a preparation method and application thereof. According to the composite material, the single metal is uniformly loaded on the carbon nano tube, wherein the mass percentage of the carbon nano tube is 63 to 95 percent, the particle diameter of the single metal is 15 to 28 nanometers, and the diameter of the carbon nano tube is 10 to 30 nanometers. The preparation method comprises the following steps of: preparing a laminated plate containing LDH of Co, Cu and Mg activity or activity-aid species by using the micro adjustable characteristics of the composition and the structure of the LDH laminated plate, growing a carbon composite material by roasting and a chemical vapor deposition method, and meanwhile reducing mixed metal oxide into the single metal so as to obtain the single metal/multi-wall carbon nano tube type composite material. A noble platinum metal is loaded on the composite material to prepare an anode catalyst of a direct methanol fuel cell, the peak current density of the catalyst on methanol electro-catalysis oxidation is 21 to 36mA.cm<2>, and the specific activity can reach 235 to 451 mA/mg. The preparation method has the advantages of simple preparation flow, low cost, environment friendliness and the like, and is suitable for industrialized application.

Description

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Claims

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Application Information

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Owner BEIJING UNIV OF CHEM TECH
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