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Heterostructure iron/cobalt bimetallic phthalocyanine electrocatalyst and preparation method and application thereof

A heterostructure, bimetallic technology, applied in the field of electrochemical energy storage, can solve the problems of general oxygen reduction reaction catalytic performance, uneven microscopic morphology, large iron phthalocyanine particles, etc., and achieve excellent electrochemical performance and electrical conductivity. The effect of improved, high kinetic current density

Active Publication Date: 2020-09-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Commercial cobalt phthalocyanine and iron phthalocyanine have large particles, uneven microscopic appearance, general catalytic performance for oxygen reduction reaction, and poor stability

Method used

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  • Heterostructure iron/cobalt bimetallic phthalocyanine electrocatalyst and preparation method and application thereof
  • Heterostructure iron/cobalt bimetallic phthalocyanine electrocatalyst and preparation method and application thereof
  • Heterostructure iron/cobalt bimetallic phthalocyanine electrocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Add low crystallinity cobalt phthalocyanine (0.150g) and iron phthalocyanine (0.050g) powder into 70mL N,N-dimethylformamide solvent and stir for 30 minutes, so that the powder is evenly dissolved in the solvent to obtain purple black solution;

[0032] 2) transfer the stirred solution into a reaction kettle, and conduct a solvothermal reaction at 180° C. for 24 hours;

[0033] 3) After the reaction is over, take out the solution after the reactor is cooled, wash it with alcohol three times, and dry it in vacuum at 80°C to obtain the precursor of the bimetallic phthalocyanine;

[0034] 4) The above product was calcined in an inert gas tube furnace at 450° C. for 3 hours at a low temperature to obtain a heterostructured iron / cobalt bimetallic phthalocyanine (FePc / CoPc HS) catalyst.

[0035] Taking the heterostructured iron / cobalt double metal phthalocyanine catalyst obtained in this example as an example, its synthesis schematic diagram is shown in the attached figu...

Embodiment 3

[0051] 1) Add commercial low-crystallinity cobalt phthalocyanine (0.100g) and iron phthalocyanine (0.100g) powder into 70mL N,N-dimethylformamide solvent and stir for 30 minutes to dissolve the powder evenly in the solvent , to obtain a purple-black solution;

[0052] 2) Transfer the stirred solution into a reaction kettle, and conduct a solvothermal reaction at 180°C for 24 hours;

[0053] 3) After the reaction is over, take out the solution after the reactor is cooled, wash it with alcohol three times, and dry it in vacuum at 80°C to obtain the precursor of the bimetallic phthalocyanine;

[0054] 4) The above product was calcined in an inert gas tube furnace at 450°C for 3 hours at a low temperature to obtain a heterostructured iron / cobalt bimetallic phthalocyanine (1:1) catalyst.

[0055] Taking the heterostructure iron / cobalt bimetallic phthalocyanine obtained in this example as an example to carry out ORR catalytic test, as shown in the attached Figure 6 As shown in a,...

Embodiment 4

[0057] 1) Add commercial low-crystallinity cobalt phthalocyanine (0.050g) and iron phthalocyanine (0.150g) powder into 70mL N,N-dimethylformamide solvent and stir for 30 minutes to dissolve the powder evenly in the solvent , to obtain a purple-black solution;

[0058] 2) Transfer the stirred solution into a reaction kettle, and conduct a solvothermal reaction at 180°C for 24 hours;

[0059] 3) After the reaction is over, take out the solution after the reactor is cooled, wash it with alcohol three times, and dry it in vacuum at 80°C to obtain the precursor of the bimetallic phthalocyanine;

[0060] 4) The above product was calcined in an inert gas tube furnace at 450° C. for 3 hours at a low temperature to obtain a heterostructured iron / cobalt bimetallic phthalocyanine (3:1) catalyst.

[0061] Taking the heterostructure iron / cobalt bimetallic phthalocyanine obtained in this example as an example to carry out ORR catalytic test, as shown in the attached Figure 6 As shown in ...

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Abstract

The invention relates to an iron / cobalt bimetallic phthalocyanine electrocatalyst with a heterostructure as well as a preparation method and application thereof, and the preparation method comprises the following steps: 1) adding commercial cobalt phthalocyanine and iron phthalocyanine powder with low crystallinity into a solvent, and uniformly stirring to dissolve the cobalt phthalocyanine and iron phthalocyanine powder to obtain a solution; 2) transferring the stirred solution into a reaction container, and carrying out solvothermal reaction under a static closed condition; 3) cooling, washing and drying to obtain a bimetal phthalocyanine precursor; and 4) roasting the product at low temperature to obtain the heterostructure iron / cobalt bimetallic phthalocyanine. Compared with the priorart, the preparation method has the advantages that bimetal phthalocyanine is subjected to phase transformation by adopting a solvothermal method, so that the bimetal phthalocyanine is compounded, thecrystallinity is improved, and the conductivity of the material is improved. Due to the design of the heterostructure, the electronic structure of the material is optimized, and the activity and thestability are improved.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a heterostructured iron / cobalt bimetallic phthalocyanine electrocatalyst and a preparation method and application thereof. Background technique [0002] With the rapid rise of the economy, the situation of environmental pollution is becoming increasingly severe. Therefore, the development of new energy sources with green, efficient and sustainable development has become an urgent problem to be solved. New types of batteries represented by metal-air batteries and fuel cells are gradually emerging. As ideal energy conversion devices, fuel cells can use hydrogen or hydrocarbon fuels to convert chemical fuel energy into electrical energy through electrochemical reactions. The chemical energy is much greater than that of ordinary batteries, such as proton exchange membrane fuel cells, hydrogen-oxygen fuel cells, etc. The entire process of the reaction does no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/06H01M12/08
CPCH01M4/9008H01M12/06H01M12/08
Inventor 周亮马瑶麦立强李坚涛罗雯
Owner WUHAN UNIV OF TECH
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