Preparation method of efficient oxygen reduction catalyst with insect wings as substrate

A technology of catalysts and wings is applied in the field of preparing high-efficiency oxygen reduction catalysts, which can solve the problems of high preparation cost, poor stability, and low catalytic activity of catalysts.

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

[0004] The purpose of the present invention is to overcome the disadvantages of the existing fuel cell cathode oxygen reduction catalysts, such as high preparation cost, scarce raw materials, low catalytic activity and poor stability, and provide a method that uses insect wings as a substrate and is co-doped with iron, cobalt and nitrogen. , a method for preparing an efficient oxygen reduction catalyst

Method used

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  • Preparation method of efficient oxygen reduction catalyst with insect wings as substrate
  • Preparation method of efficient oxygen reduction catalyst with insect wings as substrate
  • Preparation method of efficient oxygen reduction catalyst with insect wings as substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The insect species is green-belt jasmine, iron-containing compound is ferric chloride, cobalt-containing compound is pyridine cobalt, nitrogen-containing compound is melamine, and carbon black is BP2000.

[0037] Specific steps are as follows:

[0038] (1) Take 10 pieces of green-banded phoenix butterfly wings, about 0.1 g, and put them into a reaction kettle containing 30 ml of ultrapure water, and heat them in an oven for 2 hours at a temperature of 100°C. After cooling to room temperature, take out the butterfly wings, wash them with ultrapure water, and put them in an oven at 60℃ to dry for 8 hours;

[0039] (2) Take 0.1 g of carbon black BP2000, put it into a beaker containing 500 ml of ultrapure water, and perform ultrasonic treatment in an ultrasonic cleaner for 8 hours at a temperature of 25°C. After the ultrasonic treatment, centrifuge with a centrifuge to remove the supernatant, and centrifuge again with ultrapure water to clean 3 times. After the centrifugation, pu...

Embodiment 2

[0055] The insect species is green belt jasmine, the iron-containing compound is ferric nitrate, the cobalt-containing compound is pyridine cobalt, the nitrogen-containing compound is melamine, and the carbon black is BP2000.

[0056] The preparation method of the electrocatalytic material is basically the same as that of Example 1, except that the ferric chloride in step 3 is replaced with ferric nitrate. The electrocatalytic material prepared by this scheme has good oxygen reduction catalytic performance.

Embodiment 3

[0058] The insect species is green-belt jasmine, the iron-containing compound is ferric chloride, the cobalt-containing compound is pyridine cobalt, the nitrogen-containing compound is melamine, and the carbon black is BP2000.

[0059] The preparation method of the electrocatalytic material is basically the same as that of Example 1, except that the cobalt pyridine in step 3 is replaced with cobalt nitrate. The electrocatalytic material prepared by this scheme has good oxygen reduction catalytic performance.

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Abstract

The invention discloses a preparation method of an efficient oxygen reduction catalyst with insect wings as a substrate. The method comprises the steps: firstly, pretreating the insect wings and carbon black, then simultaneously putting the pretreated insect wings and carbon black into an aqueous mixed solution of an iron-containing compound, a cobalt-containing compound and a nitrogen-containing compound, carrying out ultrasonic mixing, then in a temperature range of 300-1500 DEG C and in an inert gas atmosphere, carrying out high temperature heat treatment, and cooling to obtain the efficient oxygen reduction catalyst. The prepared sample has the advantages of high catalytic activity, good stability, high yield, no pollution, environmental friendliness and the like, and a novel idea is provided for insect wing biological materials in preparation of fuel cell negative electrode catalysts.

Description

Technical field [0001] The invention relates to carbon materials, and particularly relates to a method for preparing an efficient oxygen reduction catalyst by co-doping iron, cobalt and nitrogen with insect wings as a substrate. Background technique [0002] A fuel cell is a device that directly converts the chemical energy in the fuel and oxidant in the fuel cell into electrical energy through an electrochemical reaction. It has the advantages of high energy conversion efficiency, high energy density, and pollution-free emissions. However, the development of fuel cells is limited by the cost of cathode catalysts. Currently, platinum-based catalysts are still the main fuel cell cathode catalysts. However, platinum resources are scarce and expensive, which severely restricts the commercial development of fuel cells. Therefore, the development of a low-cost, high-efficiency oxygen reduction catalyst with a wide range of sources is an effective way to promote the commercialization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9083Y02E60/50
Inventor 罗俊李龙刘熙俊
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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