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A kind of preparation method of Fe3c nanoparticle supported porous nitrogen-doped graphene oxygen reduction catalyst

A nitrogen-doped graphene and nanoparticle technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of low reserves, high cost, and weak tolerance limitations, so as to improve ORR activity and increase active sites Points, the effect of enriching the hole structure

Active Publication Date: 2022-07-29
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional Pt-based electrocatalysts have limited the large-scale application of fuel cells due to their low storage capacity, high cost, and weak methanol / carbon monoxide tolerance.

Method used

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  • A kind of preparation method of Fe3c nanoparticle supported porous nitrogen-doped graphene oxygen reduction catalyst
  • A kind of preparation method of Fe3c nanoparticle supported porous nitrogen-doped graphene oxygen reduction catalyst
  • A kind of preparation method of Fe3c nanoparticle supported porous nitrogen-doped graphene oxygen reduction catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step S1: Disperse 1 g of graphene oxide in 100 mL of deionized water, disperse 0.5 g of porphyrin iron in 50 mL of N,N-dimethylformamide (DMF), sonicate for 10 minutes, mix quickly, and stir at room temperature for 24 hours , centrifuged, and the centrifuged product was dried in an oven at 80 °C for 24 h to obtain material A1;

[0027] Step S2: Transfer material A1 to a nickel boat and place it in a tube furnace, in N 2 In the atmosphere, the temperature was raised to 700°C at a heating rate of 10°C / min and kept for 180min, and then naturally cooled to room temperature to obtain material B1;

[0028] Step S3: Transfer the material B1 to a container and add a hydrofluoric acid solution with a mass concentration of 15wt% to soak for 24 hours, then wash the filtrate with high-purity water to neutrality, and then place it in a blast drying oven at 80°C for 6 hours to obtain the target product C1.

Embodiment 2

[0030] Step S1: Combine 1g graphene oxide and 0.5g SiO 2 Disperse into 100 mL of deionized water, disperse 0.5 g of porphyrin iron into 50 mL of DMF, sonicate for 10 minutes, mix quickly, stir at room temperature for 24 hours, centrifuge, and place the centrifuged product in an 80°C oven to dry for 24 hours to obtain material A2;

[0031] Step S2: Transfer material A2 to a nickel boat and place it in a tube furnace, at N 2 In the atmosphere, the temperature was raised to 700°C at a heating rate of 10°C / min and kept for 180min, and then naturally cooled to room temperature to obtain material B2;

[0032] Step S3: Transfer the material B2 into a container and add a hydrofluoric acid solution with a mass concentration of 15wt% to soak for 24 hours, then wash the filtrate with high-purity water to neutrality, and then place it in a blast drying oven at 80°C for 6 hours to obtain the target product C2.

Embodiment 3

[0034] Step S1: Combine 1g graphene oxide and 1g SiO 2 Disperse into 100 mL of deionized water, disperse 0.5 g of porphyrin iron into 50 mL of DMF, sonicate for 10 minutes, mix quickly, stir at room temperature for 24 hours, centrifuge, and place the centrifuged product in an oven at 80 °C for 24 hours to obtain material A3;

[0035] Step S2: Transfer material A3 to a nickel boat and place it in a tube furnace, at N 2 In the atmosphere, the temperature was raised to 700°C at a heating rate of 10°C / min and kept for 180min, and then naturally cooled to room temperature to obtain material B3;

[0036] Step S3: Transfer the material B3 to a container and add a hydrofluoric acid solution with a mass concentration of 15wt% to soak for 24 hours, then wash the filtrate with high-purity water to neutrality, and then place it in a blast drying oven at 80°C for 6 hours to obtain the target product C3.

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Abstract

The invention discloses a Fe 3 The preparation method of C nanoparticle-supported porous nitrogen-doped graphene oxygen reduction catalyst, the specific process is as follows: graphene oxide, porphyrin iron and hard template SiO 2 Mix and stir, centrifuge and dry to obtain material A; transfer material A to a nickel boat and place it in a tube furnace, under the protection of inert gas, heat up to 700 ° C at a heating rate of 10 ° C / min and keep it for 180 min, and then naturally cool down to Obtain material B at room temperature; transfer material B into a container and add acid solution to soak for 24 hours, then wash the filtrate with high-purity water to neutrality, and then place it in a blast drying oven at 80 °C for 12 hours to obtain Fe 3 C nanoparticles supported porous nitrogen-doped graphene catalyst for oxygen reduction. In the present invention, by adding hard templating agent SiO 2 Adjusting the specific surface area of ​​the material and enriching the pore structure is beneficial to increase the active sites of the oxygen reduction catalyst, thereby improving the catalytic activity of oxygen reduction.

Description

technical field [0001] The invention belongs to the technical field of preparation of oxygen reduction catalysts, in particular to a kind of Fe 3 Preparation method of C nanoparticles supported porous nitrogen-doped graphene oxygen reduction catalyst. Background technique [0002] In order to meet the severe challenges of increasing energy demand and environmental crisis, great efforts have been devoted to exploring renewable and clean energy to replace fossil fuels. Fuel cell is a device that directly converts chemical energy in fuel and oxidant into electrical energy. However, its cathodic oxygen reduction reaction (ORR) kinetics are slow, which is the main factor restricting the overall efficiency of fuel cells. Traditional Pt-based electrocatalysts limit the large-scale application of fuel cells due to their low reserves, high cost, and poor methanol / CO tolerance. In order to solve the above problems, researchers are devoted to designing non-precious metal electrocata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/86
CPCH01M4/9041H01M4/9083H01M4/8652H01M4/861Y02E60/50
Inventor 高书燕张静刘云鹏张翠翠李晓沣陈野
Owner HENAN NORMAL UNIV
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