Catalyst prepared by using aryl-containing s-triazine cyclic polymer as precursor as well as preparation method and application thereof

A technology of polymerization catalyst and s-triazine, which is applied to electrical components, battery electrodes, circuits, etc., can solve problems such as inability to produce in batches, and achieve the effects of unique preparation process, low price and simple preparation process

Active Publication Date: 2017-05-31
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are three main methods for preparing NC materials: the first is pre-doping or in-situ doping (in situping), which is the simultaneous doping of nitrogen atoms when the graphite structure is formed, such as vapor phase deposition (CVD). The first method can obtain a higher N content, but it cannot be mass-produced; the second is post-synthesis, which is to oxidize and pyrolyze carbon materials (graphene, carbon nanotubes, carbon black, etc.) , substitution and other post-treatments to incorporate nitrogen atoms

Method used

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  • Catalyst prepared by using aryl-containing s-triazine cyclic polymer as precursor as well as preparation method and application thereof
  • Catalyst prepared by using aryl-containing s-triazine cyclic polymer as precursor as well as preparation method and application thereof
  • Catalyst prepared by using aryl-containing s-triazine cyclic polymer as precursor as well as preparation method and application thereof

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preparation example Construction

[0057] The preparation of the catalyst of the present invention requires the cyclization of the cyano group to generate a triazine compound. Since the carbon-nitrogen triple bond of the cyano group is relatively stable, in general, the cyclization reaction of the cyano group requires high temperature and high pressure, or the presence of a catalyst. conduct. ZnCl 2 3. Trifluoromethanesulfonic acid can catalyze the trimerization and cyclization reaction of cyano groups under normal pressure conditions, with high efficiency and convenient operation. The reaction conditions of the two catalysts are different when used, and the use of ZnCl 2 The temperature is slightly higher, at 400-600°C, the reaction time is 40-96h, the effect is better; when using trifluoromethanesulfonic acid, the required temperature is lower, about 100-200°C, and the reaction time is shorter, at 1-6h The product can be obtained within.

[0058] Preferably, in step 1), after the reaction is completed, the...

Embodiment 1

[0070] A preparation of an oxygen reduction catalyst prepared from a precursor containing an aryl-s-triazine ring polymer comprises the following steps:

[0071] 1) Preparation of poly(2,4,6-tris(p-cyanoaniline)-1,3,5-triazine): add 429 mg (1 mmol) 2,4,6-tris(p-cyanoaniline) to the sealed tube phenylamino)-1,3,5-triazine, 613.4mg (5mmol) of zinc chloride, and a small amount of absolute ethanol for ultrasonic dispersion. Then spin dry the ethanol, seal the tube and place it in a muffle furnace at 500°C for 40 hours to react to obtain a polymer. After the reaction is complete, put the polymer in a 500ml flask, add 200ml of distilled water, stir for 1h, then wash at 90°C for 12h with stirring, filter, then wash with water until neutral, then wash with dimethyl sulfoxide and acetone in turn, and vacuum dry The obtained polymer is marked as: TIF-3, and its synthetic route is as follows figure 1 Shown; its nitrogen adsorption-desorption curve and pore structure distribution are as...

Embodiment 2

[0074] A preparation of an oxygen reduction catalyst prepared from a precursor containing an aryl-s-triazine ring polymer comprises the following steps:

[0075] 1) Preparation of poly(2,4-bis(p-cyanoaniline)-1,3,5-triazine): add 313 mg (1 mmol) 2,4-bis(p-cyanoaniline) to the sealed tube -1,3,5-triazine, 1801mg (12mmol) trifluoromethanesulfonic acid, uniformly dispersed by ultrasonic. After sealing the tube, place it at 110° C. for 10 h to obtain a polymer. After the reaction is complete, put the polymer in a 500ml flask, add 200ml of distilled water, stir for 1h, then wash at 90°C for 12h under stirring, then wash with water until neutral, then wash with dimethyl sulfoxide and acetone in turn, and dry in vacuo to obtain a polymer material, marked as: TIF-2, its nitrogen adsorption-desorption curve and pore structure distribution are as follows Figure 7 , Figure 8 shown.

[0076] 2) Preparation of an oxygen reduction catalyst prepared with poly(2,4-bis(p-cyanoaniline)-1,...

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Abstract

The invention discloses a catalyst prepared by using an aryl-containing s-triazine cyclic polymer as a precursor. The catalyst is prepared according to the following steps of 1), adding an aryl-containing s-triazine monomer into a polymerization catalyst, uniformly dispersing the aryl-containing s-triazine monomer, sealing a tube, making an obtained mixture react at a heating temperature, completing a reaction, and washing and drying a reaction product, so as to obtain the aryl-containing s-triazine cyclic polymer; 2), carrying out heat treatment on the aryl-containing s-triazine cyclic polymer in an inert atmosphere, so as to obtain the catalyst prepared by using the aryl-containing s-triazine cyclic polymer as the precursor. The invention also provides a preparation method and application of the catalyst. The catalyst provided by the invention is higher in catalytic activity, low in cost and simple in preparation process, and further, has high activity and high stability.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a catalyst prepared from a polymer containing an aryl-s-triazine ring as a precursor, a preparation method and application thereof. Background technique [0002] At present, the cathode oxygen reduction catalysts used in fuel cells are mainly expensive Pt and Pt-based catalysts. Nitrogen-doped carbon (NC) materials have attracted increasing attention due to their high catalytic activity, low cost, environmental friendliness, and good stability. NC materials generally include various carbon-based materials, such as graphite, graphene, carbon nanotubes, and ordered mesoporous carbons, etc., and then adjust and optimize the inherent characteristics of these carbons by doping nitrogen atoms. Incorporation of nitrogen into the graphite structure of carbon nanomaterials (graphene, carbon nanotubes, amorphous carbon, etc.) will change the atomic and electronic structure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/8825H01M4/9008Y02E60/50
Inventor 阳梅钟小凤陈红飙黎华明
Owner XIANGTAN UNIV
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