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Method for preparing oxygen reduction catalyst by using insect wings as raw material

A technology of catalysts and wings, applied in the field of preparing oxygen reduction catalysts, can solve the problems of unclear understanding of active sites, and achieve the effects of excellent oxygen reduction performance, convenient operation and short reaction time.

Inactive Publication Date: 2017-06-13
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, porous carbon materials doped with transition metal salts and nitrogen sources are obtained through high-temperature treatment to form composite materials of non-noble metal M-N-C systems, which are considered to be the most likely materials to replace Pt-based catalysts for fuel cells, but such The material properties of the M-N-C system need to be further improved, and the understanding of its active sites is still unclear, which is still the focus of debate in the scientific research community

Method used

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  • Method for preparing oxygen reduction catalyst by using insect wings as raw material
  • Method for preparing oxygen reduction catalyst by using insect wings as raw material
  • Method for preparing oxygen reduction catalyst by using insect wings as raw material

Examples

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Embodiment 1

[0044] The insect wings are the wings of the green-banded phoenix butterfly, the carbon black is superconducting carbon black BP2000, the metal salt is ferric chloride, and the nitrogen source is polym-phenylenediamine, hydroxylamine chloride and ammonia gas.

[0045] Specific steps are as follows:

[0046] (1) Take eight pieces of wings (about 0.14g) of the green-banded phoenix butterfly, put them into a hydrothermal kettle equipped with 40mL deionized water, and conduct a hydrothermal reaction in an oven at 100°C for 100 minutes. After cooling to room temperature, take out Wings were dried in an oven at 60°C for 6 hours;

[0047] (2) Weigh 0.81g of ferric chloride, 0.11g of polym-phenylenediamine, 0.34g of hydroxylamine chloride, and 0.12g of carbon black into a 100ml beaker, add 40ml of deionized water, and ultrasonically mix for 0.5 hours to prepare into a homogeneous mixed solution;

[0048] (3) Immerse the dried eight pieces of green-banded phoenix butterfly wings in s...

Embodiment 2

[0064] The insect wings are the wings of the green-banded phoenix butterfly, the carbon black is superconducting carbon black BP2000, the metal salt is ferric nitrate, and the nitrogen source is polym-phenylenediamine, hydroxylamine chloride and ammonia gas.

[0065] The preparation method of the electrocatalytic material is basically the same as that of Example 1, except that the ferric chloride in step 2 is replaced with ferric nitrate. The catalyst material prepared in this example still has excellent oxygen reduction catalytic activity.

Embodiment 3

[0067] The insect wings are the wings of the green-banded phoenix butterfly, the carbon black is superconducting carbon black BP2000, the metal salt is ferric chloride, and the nitrogen source is polym-phenylenediamine, melamine and ammonia.

[0068] The preparation method of the electrocatalytic material is basically the same as that of Example 1, except that the hydroxylamine chloride in step 2 is replaced with melamine. The catalyst material prepared in this example still has excellent oxygen reduction catalytic activity. ,

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Abstract

The invention discloses a method for preparing an oxygen reduction catalyst by using insect wings as a raw material. The method comprises: carrying out hydrothermal treatment on insect wings, drying, preparing a mixed solution of a carbon source, a nitrogen source and a metal salt, and placing the dried insect wings into the prepared mixed solution, wherein a mass ratio of the insect wings to the carbon source to the nitrogen source to the metal salt can be arbitrarily adjusted; carrying out freeze vacuum drying or drying, and carrying out primary high-temperature carbonation on the mixture at a temperature of 500-2000 DEG C, wherein ammonia gas is introduced for 10-120 min at a temperature of 400-600 DEG C; and carrying out follow-up operations such as grinding treatment, acid treatment and secondary heat treatment so as to obtain the final catalyst material. According to the present invention, the obtained material has the high specific surface and can achieve the doping of carbon, nitrogen and non-precious metals, and the preparation method has advantages of simpleness, convenient operation, low cost and environmental protection, and provides the new idea and strategy for the cathode oxidation reduction catalyst preparation for the achievement of the replacement of the commercial Pt / C catalyst.

Description

technical field [0001] The invention relates to carbon materials, in particular to a method for preparing an oxygen reduction catalyst using insect wings as raw materials. Background technique [0002] In the field of new energy, the development of efficient and clean fuel cells plays an important role in solving environmental pollution and energy problems. However, the current cathodic oxygen reduction reaction (ORR) catalyst is mainly Pt / C catalyst, and the scarcity and high price of platinum make the cost of fuel cells too high, which hinders the large-scale application of fuel cells. However, carbon-based nitrogen-doped non-noble metal ORR catalysts have become the most promising materials to replace platinum-based catalysts due to their low price, good stability, anti-poisoning ability, and low hydrogen peroxide yield. [0003] At present, porous carbon materials doped with transition metal salts and nitrogen sources are obtained through high-temperature treatment to f...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08
CPCB01J27/24B01J37/084B01J37/088
Inventor 罗俊李怀宇刘熙俊
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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