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

Abstract

The invention relates to a new method for supporting metal platinum on the surface of carbon nanotubes by directional deposition, and contains 0.1-10 grams of carbon nanotubes, 1-100 grams of surfactants, and 0.05-10 grams of platinum per 1 liter of polyol mixture (Based on the amount of platinum contained in the metal salt), react carbon nanotubes with platinum chloride and surfactants in polyols to achieve directional chemical deposition of platinum nanoparticles on the surface of carbon nanotubes, and solve the problem of metal particles Self-agglomeration is a difficult problem; a higher loading rate of platinum is achieved, and the distribution is uniform; a dense platinum nanoparticle layer can be obtained at a higher loading rate (above 50%), and the average particle size is 5nm, and the size distribution Very narrow; the prepared carbon nanotube surface-loaded metal platinum nanoparticle catalyst has excellent electrocatalytic performance for methanol oxidation reaction, which is significantly better than similar commercial catalyst E-TEK, and can be used in electrocatalysts for fuel cells and other catalytic fields, etc. .

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...

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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

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