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Preparation method of nitrogen and sulfur co-doped hierarchical pore carbon catalyst with acid and alkali resistant oxygen reduction catalytic performance

A nitrogen-sulfur co-doping, carbon catalyst technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of ammonium chloride application limitation, unfavorable substances and ion transport, etc., to achieve the effect of enhancing electrochemical performance

Pending Publication Date: 2022-07-05
HENAN NORMAL UNIV
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Problems solved by technology

The chemical pore formers commonly used in current research are KOH, H 3 PO 4 , NaNH 2 and ZnCl 2 etc., and activated by the above reagents, the carbon material with a microporous structure can provide abundant reactive sites and contribute to the specific surface area, but it is not conducive to the transport process of substances and ions.
[0004] In addition, the continuous and rapid growth of demand for soda ash in recent years has led to an increase in the reserves of its by-product ammonium chloride, but the application of ammonium chloride is relatively limited, so a suitable treatment method for turning waste into treasure is urgently needed

Method used

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  • Preparation method of nitrogen and sulfur co-doped hierarchical pore carbon catalyst with acid and alkali resistant oxygen reduction catalytic performance
  • Preparation method of nitrogen and sulfur co-doped hierarchical pore carbon catalyst with acid and alkali resistant oxygen reduction catalytic performance
  • Preparation method of nitrogen and sulfur co-doped hierarchical pore carbon catalyst with acid and alkali resistant oxygen reduction catalytic performance

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Embodiment 1

[0027] Step S1: Dissolve 0.53 g of ammonium chloride in 50 mL of ultrapure water, then sequentially disperse 1 g of orange leaf powder and 5.7 g of nano-zinc oxide in the ammonium chloride solution, stir vigorously for 30 min, and place it in an oven at 80°C Medium drying for 12h to obtain material A1;

[0028] Step S2: fully grind the material A1 to a uniform powder state, collect the powder and place it in a corundum boat, and put it in a tube furnace for high temperature annealing, first in a continuous nitrogen atmosphere at 5°C min -1 The heating rate was increased from 25 °C to 400 °C and held for 60 min, and then heated at 5 °C min -1 The heating rate is heated to 900 ° C and kept for 60 min, and then naturally cooled to room temperature to obtain material B1. Under the high temperature molten state, the amphoteric oxide nano-zinc oxide can be combined with the hydrogen chloride released by the decomposition of ammonium chloride to release ammonia gas. This process is c...

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Abstract

The invention discloses a preparation method of a nitrogen and sulfur co-doped hierarchical pore carbon catalyst with acid and alkali resistant oxygen reduction catalytic performance, and belongs to the technical field of preparation of heteroatom doped hierarchical pore carbon oxygen reduction catalysts. According to the invention, biomass waste orange leaf powder is used as a carbon precursor, and a strategy of melting and decomposing ammonium chloride by zinc oxide is adopted, so that the nitrogen-sulfur co-doped hierarchical porous carbon catalyst with acid and alkali resistance and oxygen reduction catalysis performance is successfully synthesized. The preparation method disclosed by the invention has the outstanding advantages of being simple, green, environment-friendly, low in cost and the like, not only provides a thought for research of ZABs air electrodes, but also provides a new attempt for treatment of a byproduct ammonium chloride in the sodium carbonate industry.

Description

technical field [0001] The invention belongs to the technical field of preparation of a heteroatom-doped multi-level porous carbon-oxygen reduction catalyst, relates to a cathode catalyst for a zinc-air battery or a fuel cell, and in particular relates to a nitrogen-sulfur co-doped multi-stage catalyst with acid-alkali-resistant oxygen reduction catalytic performance Preparation method of porous carbon catalyst. Background technique [0002] At present, my country is facing the challenges of an unreasonable energy structure and a high proportion of fossil fuels. It is urgent to build a new energy development pattern with new energy as the main body, unswervingly anchor the "dual carbon" goal, and pursue green and low-carbon development. road. As a member of electrochemical energy storage devices, Zinc-Air Battery (ZAB) has the advantages of low cost, environmental protection and high theoretical energy density. It is widely used in electronic products, new energy power gener...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/90
CPCH01M4/88H01M4/9083H01M4/8605Y02E60/50
Inventor 高书燕王首婷刘旭坡王奎王坤赵亚岭
Owner HENAN NORMAL UNIV
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