Preparation method of nitrogen-sulfur co-doped carbon-coated transition metal nano sulfide electrochemical oxygen catalyst

A nitrogen-sulfur co-doping, transition metal technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of scarcity and high price hindering the large-scale practical application of batteries, and achieve The effects of abundant reserves, good conductivity and simple preparation method

Active Publication Date: 2021-08-06
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, the noble metal-based catalyst Pt is considered to be the most efficient catalyst for the ORR reaction, and the noble metal IrO 2 and RuO 2 considered to be the most active electrocatalysts for OER [Nat.Commun.2013, 4, 1805], but their scarcity and high price severely hinder the large-scale practical application of batteries

Method used

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  • Preparation method of nitrogen-sulfur co-doped carbon-coated transition metal nano sulfide electrochemical oxygen catalyst
  • Preparation method of nitrogen-sulfur co-doped carbon-coated transition metal nano sulfide electrochemical oxygen catalyst
  • Preparation method of nitrogen-sulfur co-doped carbon-coated transition metal nano sulfide electrochemical oxygen catalyst

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Embodiment 1

[0030] A method for preparing a nitrogen-doped carbon coated transition metal nanosulfide electrochemical oxygen catalyst, the specific operation steps are as follows:

[0031] (1) 2,6-diacetylpyridine 1.3 g was placed in 150 mL of flat bottom flask, and 50 mL of anhydrous ethanol was added to the flat bottom flask, stirred until 2,6-diacetylpyridine completely dissolved, according to acetyl And the molar ratio of the amino group was 1: 1 to 1.99 g of 2,2'-di aminoisulfide sulfonthionic ether, stirred to completely dissolve, add 0.1 g of ohoxic acid to the flat flask, stirred for 30 min, and turn the flask to the oil bath. The temperature rose to 60 ° C, reacted at a constant temperature stirring for 10 hours;

[0032](2) After the reaction is cooled to room temperature, then 1.90 g of hexahydrate chloride is added to the room temperature, and the reaction is added to 12 hours while stirring, and the obtained substance after the reaction is removed by a rotary evaporator to evapor...

Embodiment 2

[0036] A method for preparing a nitrogen-doped carbon coated transition metal nanosulfide electrochemical oxygen catalyst, the specific operation steps are as follows:

[0037] (1) 2,6-diacetylpyridine 1.3 g was placed in 150 mL of flat flask, and 50 ml of organic solvent anhydrous ethanol was added to the flat flask, stirred until 2,6-diacetylpyridine completely dissolved, press The acetyl and the molar ratio of the amino group was added to 1.98 g of the sulfur-containing amino monomer 4,4-di-diiminary thion ether, stirred to completely dissolve, add 0.1 g of ohoxic acid to the flat flask, stirred for 30min, and turn the flask In the oil bath, heated to 80 ° C, reacted at a constant temperature stirring for 12 hours;

[0038] (2) After the step (1), the resulting solution was cooled to room temperature, and 2.16 g of the transition metal-containing inorganic salt hexahydrachloride was added while stirring, 10 hours of reaction at room temperature, and the obtained substance was r...

Embodiment 3

[0043] A method for preparing a nitrogen-doped carbon coated transition metal nanosulfide electrochemical oxygen catalyst, the specific operation steps are as follows:

[0044] (1) 2,6-diacetylpyridine 1.0 g was placed in three 150 ml flat flasks, and 50 ml of organic solvent anhydrous ethanol was added to the flat bottom flask, stirred until 2,6-diacetylpyridine is completely The molar ratio of the acetyl group and the amino group was added to 1.31 g of the sulfur-containing amino monomer 2,2'-di-diiminated aminogenated 1.31 g, stirred to completely dissolve, and 0.1 g of ohoxic acid was added to the flat bottom flask, stirred for 30min , Turn the flask to the oil bath, warmed to 100 ° C, reacted at a constant temperature stirred for 8 hours;

[0045] (2) After the reaction is cooled to room temperature after reacting step (1), 3.6 g, 1.2 g, 0.4 g of a transition metal hexahydride-containing nickel-containing nickel-containing nickel-containing nickel-containing nickel-containing...

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Abstract

The invention discloses a preparation method of a nitrogen-sulfur co-doped carbon-coated transition metal nano sulfide electrochemical oxygen catalyst. The preparation method comprises the following steps of: (1) taking a 2, 6-diacetylpyridine monomer solution, adding a sulfur-containing amino monomer, performing stirring to realize dissolving, adding acid, performing heating and performing a reaction; (2) performing cooling, adding transition metal-containing inorganic salt for reaction, performing evaporating, drying and grinding; (3) carrying out first thermal cracking, cooling to room temperature, and carrying out acid pickling and drying on an obtained substance; and (4) carrying out second thermal cracking to obtain the nitrogen-sulfur co-doped carbon-coated transition metal nano sulfide electrochemical oxygen catalyst. The nitrogen-sulfur co-doped carbon-coated transition metal nano sulfide electrochemical oxygen catalyst prepared by the invention is composed of transition metal sulfide, carbon, nitrogen and sulfur, has the structural characteristics of highly graphitized carbon layer-coated transition metal sulfide, and also has the advantages of good conductivity, mesoporous and macroporous structure, many surface defects, and high catalytic performance of oxygen reduction and oxygen evolution.

Description

Technical field [0001] The present invention relates to the field of electrochemical new energy catalytic materials, and more particularly to a method for preparing a nitrogen-doped carbon coated transition metal nano sulfide electrochemical oxygen catalyst. Background technique [0002] In the transition of fossil fuels and renewable energy, we must face energy collection, conversion, storage, and release increasing demand. In order to achieve better energy utilization, develop advanced technology (water decomposition devices, fuel cells to metal air batteries) is a topic of modern society. In all aspects of our industrial and daily lives, power supply plays a vital role in various devices that drive, from large grid energy storage systems to automotive and small electronic equipment [J.Mater.Chem.a, 2019, 7, 18183]. Lithium-ion batteries are the most successful power supplies to date, which have been widely used in various fields. However, the safety and high cost of the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90B82Y30/00B82Y40/00
CPCH01M4/8825H01M4/90H01M4/9083B82Y30/00B82Y40/00H01M2004/8689Y02P20/133
Inventor 田植群吕丹丹姚思先沈培康
Owner GUANGXI UNIV
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