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Method for preparing heterogeneous single-molecule electrocatalyst by using metal phthalocyanine molecule-nano carbon and its application

A kind of electrocatalyst, metal phthalocyanine technology

Active Publication Date: 2021-07-13
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for most homogeneous molecular catalysts, their catalytic performance is often limited by the aggregation of molecules and poor electrical conductivity, resulting in a low catalytic reduction current density, and the stability and selectivity cannot be further improved.

Method used

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  • Method for preparing heterogeneous single-molecule electrocatalyst by using metal phthalocyanine molecule-nano carbon and its application
  • Method for preparing heterogeneous single-molecule electrocatalyst by using metal phthalocyanine molecule-nano carbon and its application
  • Method for preparing heterogeneous single-molecule electrocatalyst by using metal phthalocyanine molecule-nano carbon and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Nickel phthalocyanine and carbon nanotubes were weighed according to a mass ratio of 1:8, and dispersed in N,N-dimethylformamide with the assistance of ultrasound. The nickel phthalocyanine molecular dispersion was slowly added dropwise to the carbon nanotube dispersion, and ultrasonication was continued for 1 h with the assistance of ultrasound. The mixed solution of nickel phthalocyanine molecules and carbon nanotubes was stirred at room temperature for 24 h under the action of magnetic stirring. Centrifuge the obtained catalyst at high speed or filter it with suction, wash and centrifuge it with N,N-dimethylformamide and ethanol for 3 to 5 times respectively, freeze the obtained solid in liquid nitrogen, and then place it in a freeze dryer to freeze dry More than 24h, the obtained solid powder is the electrocatalyst product (NiPc / CNT). Mix PTFE, Nafion and electrocatalyst according to the mass ratio of 2:0.5:4 to obtain catalyst slurry, according to the loading of 1...

Embodiment 2

[0074] According to the mass ratio of 1:8, cyano-substituted nickel phthalocyanine and carbon nanotubes were respectively weighed and dispersed in N,N-dimethylformamide under the assistance of ultrasound. Slowly add the cyano-substituted nickel phthalocyanine molecular dispersion into the carbon nanotube dispersion, and continue to sonicate for 1 h with the assistance of ultrasound. The mixed solution of cyano-substituted nickel phthalocyanine molecules and carbon nanotubes was stirred at room temperature for 24 h under the action of magnetic stirring. Centrifuge the obtained catalyst at high speed or filter it with suction, wash and centrifuge it with N,N-dimethylformamide and ethanol for 3 to 5 times respectively, freeze the obtained solid in liquid nitrogen, and then place it in a freeze dryer to freeze dry More than 24h, the obtained solid powder is the electrocatalyst product (NiPc-CN / CNT). Mix PTFE, Nafion and electrocatalyst according to the mass ratio of 2:0.5:4 to ob...

Embodiment 3

[0077] According to the mass ratio of 1:8, the methoxy-substituted nickel phthalocyanine and carbon nanotubes were respectively weighed and dispersed in N,N-dimethylformamide under the assistance of ultrasound. The methoxyl substituted nickel phthalocyanine molecular dispersion was slowly added dropwise to the carbon nanotube dispersion, and continued to sonicate for 1 h with the assistance of ultrasound. The mixed solution of methoxy-substituted nickel phthalocyanine molecules and carbon nanotubes was stirred at room temperature for 24 h under the action of magnetic stirring. Centrifuge the obtained catalyst at high speed or filter it with suction, wash and centrifuge it with N,N-dimethylformamide and ethanol for 3 to 5 times respectively, freeze the obtained solid in liquid nitrogen, and then place it in a freeze dryer to freeze dry More than 24h, the obtained solid powder is the electrocatalyst product (NiPc-OMe / CNT). Mix PTFE, Nafion and electrocatalyst according to the m...

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Abstract

The invention discloses a method for preparing a heterogeneous single-molecule electrocatalyst by using metal phthalocyanine molecule-nano carbon and its application. Among them, the method for preparing the electrocatalyst includes: by fully compounding metal phthalocyanine molecules and carbon nanomaterials (such as carbon nanotubes) in a good solution, and post-processing the product, the phthalocyanine molecules are formed on the surface of the carbon nanocarrier Dispersion avoids aggregation to obtain the heterogeneous single-molecule electrocatalyst. The integration of the single-molecule catalyst on the gas diffusion electrode achieves high product selectivity and stability under high current in the carbon dioxide reduction reaction, and is expected to be applied in commercial equipment. This type of catalyst also exhibits excellent catalytic performance for the reduction of oxygen to peroxides. The method is universal, applicable to various high-performance metal phthalocyanine-nano-carbon composite electrocatalysts, and has the advantages of simple and efficient preparation methods.

Description

technical field [0001] The invention relates to the field of electrocatalysis, specifically, the invention relates to a method for preparing a single-molecule heterogeneous single-molecule electrocatalyst by using metal phthalocyanine molecule-nano carbon and its application. Background technique [0002] With the rapid development of society, the energy crisis faced by mankind has become increasingly prominent. However, traditional fossil fuels have limited reserves, and at the same time, they will bring environmental problems such as air pollution and greenhouse gas emissions during use. The development of green, safe and efficient energy storage and conversion technology is an urgent need for the development of human society. Fuel cells, metal-air batteries, and carbon dioxide electrocatalytic conversion technologies based on electrochemical reactions have attracted much attention due to their high conversion efficiency, low environmental impact, easy storage of chemical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90
CPCH01M4/8668H01M4/8807H01M4/8878H01M4/9008Y02E60/50
Inventor 梁永晔王洋张霄
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA