Preparation method of iron-based triazine ring polymer catalyst

A technology of iron-based triazine rings and polymers, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of unsatisfactory zinc metal active sites and difficult removal, etc., to achieve Good oxygen reduction stability, activity enhancement effect

Pending Publication Date: 2022-06-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When currently preparing covalent triazine ring polymers, most of the catalysts are selected as anhydrous zinc chloride, and anhydrous zinc chloride is used to catalyze cyclotrimerization to promote the reversible reaction to generate covalent triazine rings, but the generated The polymer contains a lot of zinc and its polymers, which are difficult to remove
However, the zinc metal active sites are not ideal for oxygen reduction.

Method used

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  • Preparation method of iron-based triazine ring polymer catalyst
  • Preparation method of iron-based triazine ring polymer catalyst
  • Preparation method of iron-based triazine ring polymer catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After mixing 0.391g of 1,4-terephthalonitrile, 2.43g of anhydrous ferric chloride, and 0.09g of conductive carbon black (super-p), they were thoroughly ground in a glove box, and then transferred to an ampoule tube for vacuum packaging, Place the packaged mixture in a muffle furnace to raise the temperature to 300°C at 5°C / min and keep it warm for 20 hours, then take out the reactant and grind it thoroughly, then transfer it to a tube furnace, and raise the temperature at 5°C / min under a nitrogen atmosphere to 900°C and keep it warm for 2h, and finally the reactant was pickled with 0.5mol / L hydrochloric acid at 60°C for 6h, washed and dried with deionized water, then transferred to a tube furnace, and heated at 5°C / min under a nitrogen atmosphere. Raise the temperature to 900°C and keep it warm for 2 hours to prepare an iron-based triazine ring polymer catalyst;

[0021] Simultaneously, anhydrous zinc chloride is used as raw material to prepare zinc-based triazine ring ...

Embodiment 2

[0028] After mixing 0.534g of 1,2,4,5-pyromene tetracarbonitrile, 1.95g of anhydrous ferric chloride, and 0.09g of conductive carbon black (super-p), they were thoroughly ground in a glove box, and then transferred to ampoules Vacuum packaging, the packaged mixture is placed in a muffle furnace and heated to 300 °C at 5 °C / min and kept for 20 hours, then the reactants are taken out and fully ground, then transferred to a tube furnace, and heated at 5 °C under a nitrogen atmosphere. / min to 900°C and keep it warm for 2h. Finally, the reactant was pickled with 0.5mol / L hydrochloric acid at 60°C for 6h, washed and dried with deionized water, and then transferred to a tube furnace. °C / min, the temperature was raised to 900 °C and kept for 2 hours to prepare an iron-based triazine ring polymer catalyst;

[0029] Simultaneously, anhydrous zinc chloride is used as raw material to prepare zinc-based triazine ring polymer, and all the other processes are the same as above, as a contras...

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Abstract

The invention discloses a preparation method of an iron-based triazine ring polymer catalyst, which comprises the following steps of: mixing 1, 4-terephthalonitrile, anhydrous ferric chloride and conductive carbon black, grinding, packaging in an ampoule tube in vacuum, heating to 250-350 DEG C in a muffle furnace at the speed of 5 DEG C / min, preserving heat for 20 hours, taking out a reactant, fully grinding, transferring into a tube furnace, heating to 250-350 DEG C at the speed of 5 DEG C / min, and cooling to room temperature to obtain the iron-based triazine ring polymer catalyst. And heating to 850-950 DEG C at the speed of 5 DEG C / min in a nitrogen atmosphere, preserving heat for 2 hours, carrying out acid leaching on the reactant by 0.5 mol / L hydrochloric acid at 55-65 DEG C for 6 hours, washing and drying, transferring into a tubular furnace, heating to 850-950 DEG C at the speed of 5 DEG C / min in the nitrogen atmosphere, and preserving heat for 2 hours, thereby obtaining the high-purity silicon carbide. Compared with a traditional method, the method has the advantages that the covalent triazine ring is directly doped into a metal monatomic active site during synthesis, the catalyst does not need to be modified subsequently, the activity of the iron-based triazine ring polymer catalyst prepared by the method in an acidic electrolyte is greatly improved, and the iron-based triazine ring polymer catalyst shows good oxygen reduction stability.

Description

technical field [0001] The invention relates to a preparation method of an iron-based triazine ring polymer catalyst and its application in oxygen reduction reaction, belonging to the field of catalyst preparation. Background technique [0002] When currently preparing covalent triazine ring polymers, most of the catalysts are selected as anhydrous zinc chloride, and anhydrous zinc chloride is used to catalyze cyclotrimerization to promote the reversible reaction to generate covalent triazine rings, but the generated The polymer contains very much zinc and its polymers, which are difficult to remove. However, the zinc metal active sites are not ideal for oxygen reduction. Contents of the invention [0003] Aiming at the problems existing in the existing methods for preparing single-atom catalysts, the present invention provides a method for preparing iron-based triazine ring polymer catalysts, [0004] Anhydrous ferric chloride is used as a catalyst to catalyze the cyclo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J37/08H01M4/90
CPCB01J35/0033B01J37/082B01J27/24H01M4/9041H01M4/9083
Inventor 李涛
Owner KUNMING UNIV OF SCI & TECH
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