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Oxygen evolution catalyst ofnitrogen-sulfur-containing ordered mesoporous carbon coated nano Co3O4

A mesoporous carbon and catalyst technology, applied in the field of electrochemical energy, can solve problems such as slowness, limitation, high overpotential, and reduced catalytic efficiency of oxygen evolution reaction

Active Publication Date: 2022-02-18
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, fuel cells have been widely developed and applied due to their high energy conversion efficiency, low environmental pollution, and long service life. Fuel cells convert the chemical energy of fuel directly into electrical energy through electrochemical reactions. During the electrochemical reaction process, the anode oxygen evolution reaction (OER) has a high overpotential and slow reaction kinetics, which limits the electrochemical energy storage and conversion process of the fuel cell. The development of new and efficient non-noble metal oxygen evolution reaction catalysts promotes The oxygen evolution reaction of fuel cells is of great significance. Among them, transition metal oxides, such as cobalt oxides and iron oxides, are cheap and easy to obtain, and have high catalytic activity. They have broad application prospects in oxygen evolution reaction catalysts, such as patent CN108855181B , disclosed that BCNO nanosheets supported Co 3 o 4 Composite catalysts can be used as oxygen evolution reaction electrocatalysts for zinc-air batteries and clean energy, and nano-Co 3 o 4 has a large specific surface area and excellent catalytic activity, but Co 3 o 4 The electron conductivity is low, and it is easy to agglomerate in the electrolyte, which reduces the catalytic efficiency of its oxygen evolution reaction and hinders the nano-Co 3 o 4 Application in the oxygen evolution reaction, the present invention aims at the nano Co 3 o 4 Loaded into nitrogen-sulfur-containing ordered mesoporous carbon to obtain a catalyst for oxygen evolution reaction with high catalytic performance

Method used

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  • Oxygen evolution catalyst ofnitrogen-sulfur-containing ordered mesoporous carbon coated nano Co3O4

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Experimental program
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Effect test

Embodiment 1

[0028] (1) 0.6g of phthalic anhydride and 0.5g of 2-(4-(thiophen-2-yl)phenyl)thiophene were dissolved in 20mL of dichloromethane, and 0.62g of catalyst was added in a nitrogen atmosphere Aluminum trichloride, heated to 25°C for reflux reaction for 12h, concentrated under reduced pressure after the reaction, and separated by column chromatography with petroleum ether: ethyl acetate = 3:1 eluent to obtain terephthalenedi(carboxyphenyl)thiophene compound.

[0029] (2) Dissolve 1g of p-di(carboxyphenyl)thiophene compound and 0.3g of pyrrole in 80mL of 1,2-dichloromethane, add 1.2g of dimethoxymethane and 1.1g of trichloride in a nitrogen atmosphere Iron, stirred evenly, heated to 70°C, reacted for 15 hours, cooled after reaction, distilled under reduced pressure, extracted with methanol, tetrahydrofuran and dichloromethane in sequence to obtain carboxyl-containing thiophene pyrrole hypercrosslinked polymer.

[0030] (3) Add 2 g of carboxyl-containing thiophene pyrrole hypercrossl...

Embodiment 2

[0033] (1) 0.65g of phthalic anhydride and 0.5g of 2-(4-(thiophen-2-yl)phenyl)thiophene were dissolved in 20mL of dichloromethane, and 0.7g of catalyst was added in a nitrogen atmosphere Aluminum trichloride, heated to 40°C for reflux reaction for 18h, concentrated under reduced pressure after the reaction, and separated by column chromatography with an eluent of petroleum ether:ethyl acetate=5:1 to obtain terephthalenedi(carboxyphenyl)thiophene compound.

[0034] (2) Dissolve 1g of p-di(carboxyphenyl)thiophene compound and 0.4g of pyrrole into 100mL of 1,2-dichloromethane, add 1.4g of dimethoxymethane and 1.25g of trichloride in a nitrogen atmosphere Iron, stirred evenly, heated to 70°C, reacted for 30h, cooled after reaction, distilled under reduced pressure, extracted with methanol, tetrahydrofuran and dichloromethane in sequence to obtain carboxyl-containing thiophene pyrrole hypercrosslinked polymer.

[0035] (3) Add 2g of carboxyl-containing thiophene pyrrole hypercross...

Embodiment 3

[0038] (1) 0.72g of phthalic anhydride and 0.5g of 2-(4-(thiophen-2-yl)phenyl)thiophene were dissolved in 30mL of dichloromethane, and 0.75g of catalyst was added in a nitrogen atmosphere Aluminum trichloride, heated to 40°C for reflux reaction for 18h, concentrated under reduced pressure after the reaction, and separated by column chromatography with petroleum ether: ethyl acetate = 15:1 eluent to obtain terephthalenedi(carboxyphenyl)thiophene compound.

[0039] (2) Dissolve 1g of p-phenylene di(carboxyphenyl)thiophene compound and 0.48g of pyrrole into 120mL of 1,2-dichloromethane, add 1.6g of dimethoxymethane and 1.5g of trichloride in a nitrogen atmosphere Iron, stirred evenly, heated to 75°C, reacted for 24 hours, cooled after reaction, distilled under reduced pressure, extracted with methanol, tetrahydrofuran and dichloromethane in sequence to obtain carboxyl-containing thiophene pyrrole hypercrosslinked polymer.

[0040] (3) Add 2g of carboxyl-containing thiophene pyrr...

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Abstract

The invention relates to the technical field of electrochemical energy, and discloses an oxygen evolution catalyst of nitrogen-sulfur-containing ordered mesoporous carbon coated nano Co3O4, a carboxyl-containing thiophene pyrrole super-crosslinked polymer is large in specific surface area and has a certain microporous structure, the main chain contains rich aromatic carboxyl groups and can generate strong metal coordination with Co < 2 + >, so that the Co < 2 + > is uniformly loaded into the matrix of the super-crosslinked polymer, the generated nano Co3O4 uniformly grows in the matrix of the ordered mesoporous carbon, and the ordered mesoporous carbon contains functional groups such as pyridine nitrogen, pyrrole nitrogen and thiophenic sulfur, the mesoporous carbon has higher electrochemical performance, excellent conductivity, more active catalytic sites and large specific surface area, and excellent wettability with the electrolyte, so that the oxygen evolution catalyst of the nitrogen-sulfur-containing ordered mesoporous carbon coated nano Co3O4 shows better overpotential in a catalytic oxygen evolution reaction.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy, in particular to a nitrogen-sulfur-containing ordered mesoporous carbon-coated nanometer Co 3 o 4 oxygen evolution catalyst. Background technique [0002] In recent years, fuel cells have been widely developed and applied due to their high energy conversion efficiency, low environmental pollution, and long service life. Fuel cells convert the chemical energy of fuel directly into electrical energy through electrochemical reactions. During the electrochemical reaction process, the anode oxygen evolution reaction (OER) has a high overpotential and slow reaction kinetics, which limits the electrochemical energy storage and conversion process of the fuel cell. The development of new and efficient non-noble metal oxygen evolution reaction catalysts promotes The oxygen evolution reaction of fuel cells is of great significance. Among them, transition metal oxides, such as cobalt oxides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/093
CPCC25B1/04C25B11/093Y02E60/36Y02E60/50
Inventor 李静王德宝
Owner QINGDAO UNIV OF SCI & TECH