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Carbon material loaded silver-platinum nano-alloy composite material and preparation method thereof

A technology of composite materials and carbon materials, which is applied in the field of silver-platinum nano-alloy composite materials supported by carbon materials and its preparation, can solve the problems of metal catalyst shedding, catalyst structure collapse, corrosion, etc., and achieve reduced production difficulty, high yield, The effect of simple process

Active Publication Date: 2019-03-29
LONGYAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing carbon support will corrode during the catalytic process, which will lead to adverse effects such as the collapse of the catalyst structure or the shedding of the supported metal catalyst, so the improvement of the support is also necessary

Method used

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  • Carbon material loaded silver-platinum nano-alloy composite material and preparation method thereof
  • Carbon material loaded silver-platinum nano-alloy composite material and preparation method thereof
  • Carbon material loaded silver-platinum nano-alloy composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Configure mixed solution 1 with a mass ratio of ammonia water and methanol of 1:10, then mix silver carbonate and potassium hexachloroplatinate with mixed solution 1 at a mass ratio of 1:1:1 to make mixed solution 2, After standing at room temperature for 4 hours, the precursor solution was prepared.

[0028] Mix the precursor solution, conductive carbon black and ethanol at a mass ratio of 1:1:1, heat the resulting mixture at 140°C for 2 hours, centrifuge and dry the resulting precipitate to prepare conductive carbon black-loaded silver platinum nanoparticles alloy composites. figure 1 with figure 2 The transmission electron microscope image of the silver-platinum nano-alloy composite material loaded with conductive carbon black shows that the composite material is composed of metal nanoparticles and carbon supports.

Embodiment 2

[0030] Prepare mixed solution 1 with a mass ratio of ammonia water and acetone of 1:5, then mix silver nitrate, chloroplatinic acid and mixed solution 1 with a mass ratio of 1:5:10 to make mixed solution 2, and then Stand still for 5 hours to prepare the precursor solution.

[0031] Mix the precursor solution, heteroatom-doped carbon material and ethylene glycol at a mass ratio of 1:100:100, heat the resulting mixture at 120°C for 4 hours, centrifuge and dry the resulting precipitate to obtain the heteroatom-doped Silver-platinum nanocomposites supported by heterocarbon materials. image 3 It is the XRD pattern of the silver-platinum nano-alloy composite material supported by heteroatom-doped carbon material, it can be seen that the position of the X-ray diffraction peak of the material is between the pure silver and pure platinum samples, which proves that it is composed of alloy structure composition.

Embodiment 3

[0033] Prepare mixed solution 1 with a mass ratio of ammonia water and ethyl acetate of 1:1, and then mix silver sulfate, potassium tetrachloroplatinate and mixed solution 1 at a mass ratio of 1:10:15 to make a mixed solution 2, and then stand at room temperature for 6 hours to prepare a precursor solution.

[0034] Mix the precursor solution, carbon nanotubes and acetonitrile at a mass ratio of 1:500:500, heat the resulting mixture at 80°C for 6 hours, centrifuge and dry the resulting precipitate to prepare carbon nanotube-loaded silver-platinum nanoalloys composite material. Figure 4 The transmission electron microscope image of the silver-platinum nano-alloy composite material supported by carbon nanotubes prepared in this example shows that the prepared composite material has a good crystal phase.

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Abstract

The invention provides a carbon material loaded silver-platinum nano-alloy composite material and a preparation method thereof, and the composite material is composed of a carbon carrier and silver-platinum nano-particles, wherein the carbon carrier is selected from one of conductive carbon black, a heteroatom doped carbon material, a carbon nano-tube and graphene; and the atomic ratio of silver to platinum in silver-platinum nanoparticles is 1: 20-1: 3. The preparation method of the composite material comprises the following steps: (1) preparing a precursor solution consisting of silver saltand platinum salt; (2) mixing the precursor solution, a carbon material and a solvent, and performing heating. The preparation method disclosed by the invention is suitable for various carbon materials, strong in applicability, simple and convenient in process, high in repeatability, high in yield, mild in used reaction conditions, environment-friendly and convenient for large-scale industrial production. The prepared composite material has the advantages of high catalytic activity, good stability, low cost and the like, and has potential application values in the fields of chemical catalysis,electrochemical catalysis, photocatalysis and electrochemical sensors.

Description

technical field [0001] The invention belongs to the field of energy materials and material synthesis, and in particular relates to a silver-platinum nano-alloy composite material supported by carbon materials and a preparation method thereof. Background technique [0002] Fuel cells have the advantages of high energy conversion efficiency and non-polluting operating products, and have great application prospects in the field of new energy vehicles. Catalysts are usually required in the cathode and anode of fuel cells to catalyze the reaction of fuel on the electrodes, and platinum metal is the most widely used and best-performing electrode reaction catalyst. However, since platinum metal is a scarce resource and its unit price is expensive, using pure platinum as a catalyst to construct fuel cells will greatly increase the cost of fuel cells, hindering its practical application. Therefore, how to effectively reduce the amount of platinum metal in the catalyst while improvin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/88B82Y30/00
CPCB82Y30/00H01M4/8825H01M4/9041H01M4/9083H01M4/926Y02E60/50
Inventor 傅韬凌云旸陈晰薛松
Owner LONGYAN UNIV
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