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Oxygen reduction catalyst prepared based on tetra-beta-(4-formylphenoxy)phthalocyanine cobalt aerogel and preparation method thereof

A technology of aldehyde phenoxy and cobalt phthalocyanine, which is applied in the field of oxygen reduction catalyst and its preparation, and can solve the problems of restricting the development of fuel cells, scarcity of reserves, and high price

Active Publication Date: 2020-01-03
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cathode oxygen reduction reaction, as the key to fuel cells, has slow reaction kinetics and causes activation loss, which limits the development of fuel cells.
[0003] However, traditional fuel cells mostly use Pt-based catalysts, but as a noble metal, Pt is not only expensive, but also has scarce reserves, making it difficult to maintain commercial mass production of fuel cells.

Method used

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  • Oxygen reduction catalyst prepared based on tetra-beta-(4-formylphenoxy)phthalocyanine cobalt aerogel and preparation method thereof
  • Oxygen reduction catalyst prepared based on tetra-beta-(4-formylphenoxy)phthalocyanine cobalt aerogel and preparation method thereof
  • Oxygen reduction catalyst prepared based on tetra-beta-(4-formylphenoxy)phthalocyanine cobalt aerogel and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) Add 0.06 g of tetrakis-β-(4-formylphenoxy)cobalt phthalocyanine into 2 mL of N,N-dimethylformamide, and disperse ultrasonically in a 40KHz ultrasonic apparatus for 8 minutes to obtain a crosslinking agent solution.

[0055] 2) In 4g of a mixed aqueous solution containing 1wt% acetic acid and 3wt% chitosan, add the above-mentioned cross-linking agent solution, and obtain a dark green hydrogel after rapid shaking, soak the prepared hydrogel in 300mL deionized water Remove excess solvent for 6 hours, continue to soak in 10 mL of 5 mg / mL graphene oxide aqueous solution for 6 hours, and obtain a composite hydrogel by electrostatic adsorption.

[0056] 3) The obtained composite hydrogel was freeze-dried at -57°C for 18 hours to obtain a light green composite aerogel.

[0057] 4) Under the protection of high-purity argon, the obtained composite airgel was subjected to high-temperature heat treatment at 600°C, 700°C, 800°C, and 900°C for 2 hours to obtain a black powder prod...

Embodiment 2

[0062] Sample 1: CS / CoPc / GO

[0063] 1) Add 0.06g tetrakis-β-(4-formylphenoxy) cobalt phthalocyanine to 2mL N,N-dimethylformamide, and ultrasonically disperse in a 40KHz ultrasonic apparatus for 10min to obtain a crosslinking agent solution.

[0064] 2) In 4g of mixed aqueous solution containing 1wt% acetic acid and 3wt% chitosan, add the above-mentioned crosslinking agent solution, and obtain dark green hydrogel after rapid shaking, soak the prepared hydrogel in 300mL deionized water Remove excess solvent for 6 hours, continue soaking in 10ml of 5mg / mL graphene oxide aqueous solution for 6 hours, and obtain composite hydrogel by electrostatic adsorption.

[0065] 3) After the obtained composite hydrogel was freeze-dried at -57°C for 24 hours, the light green composite airgel was obtained, which was the sample CS / CoPc / GO.

[0066] Sample 2: Co / N / C-800(noneGO)

[0067] 1) Add 0.06g tetrakis-β-(4-formylphenoxy) cobalt phthalocyanine to 2mL N,N-dimethylformamide, and ultrasonic...

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Abstract

The invention relates to the technical field of preparation of catalysts and provides a method for preparing an oxygen reduction catalyst based on tetra-beta-(4-formylphenoxy)phthalocyanine cobalt aerogel. The method comprises the following steps: (1) mixing tetra-beta-(4-formylphenoxy)phthalocyanine cobalt, an organic solvent and an acetic acid-amino enriched organic matter mixed solution, so asto obtain hydrogel; (2) soaking the hydrogel obtained in step (1) into water to remove the surplus solvent; after taking out the hydrogel, soaking the hydrogel into a graphene oxide solution or a multi-walled carbon nanotube solution and adsorbing, so as to obtain compound hydrogel; (3) carrying out freeze drying on the compound hydrogel obtained in step (2), so as to obtain compound aerogel; and(4) carrying out high-heat treatment on the compound aerogel obtained in step (3) under a protection atmosphere, so as to obtain the oxygen reduction catalyst. The invention further provides the oxygen reduction catalyst obtained by the method, and the oxygen reduction catalyst contains N, C and Co at the same time; and raw materials are easy to obtain and the oxygen reduction catalyst is easy toimplement. The product provided by the invention has excellent electrochemical performance and catalytic performance.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to an oxygen reduction catalyst prepared based on tetra-beta-(4-formylphenoxy)cobalt phthalocyanine airgel and a preparation method thereof. Background technique [0002] Fuel cells have many advantages such as cleanness and high efficiency, and are considered to be one of the most promising green energy sources. However, the oxygen reduction reaction at the cathode, as the key to fuel cells, has slow reaction kinetics and causes activation loss, which limits the development of fuel cells. [0003] However, traditional fuel cells mostly use Pt-based catalysts, but as a noble metal, Pt is not only expensive, but also has scarce reserves, making it difficult to maintain commercial mass production of fuel cells. Contents of the invention [0004] The purpose of the present invention is to provide a method for preparing an oxygen reduction catalyst based on airgel and th...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10B01J37/08B01J37/34
CPCB01J27/24B01J37/082B01J37/343B01J35/33B01J35/615
Inventor 左霞付媛媛于越
Owner CAPITAL NORMAL UNIVERSITY
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