Preparation method for monatomic ion dispersed oxygen reduction electro-catalyst

An electrocatalyst and dispersion technology, applied in the field of electrocatalysis, can solve problems such as instability and weak performance, and achieve the effects of convenient operation, excellent electrical conductivity, and cost reduction

Active Publication Date: 2017-11-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the development of non-precious metal oxygen reduction catalysts under acidic conditions is also very rapid, there is still a certain gap with commercial platinum carbon in terms of the performance of the electrocatalytic oxygen reduction reaction, especially for carbon-based catalysts without metal doping. This type of catalyst will achieve electrocatalytic ability comparable to that of platinum carbon under alkaline conditions, but its performance under acidic conditions is very weak and extremely unstable, so the development of a catalyst no matter under acidic conditions or under alkaline conditions can exhibit excellent electrocatalytic performance is the focus of our research

Method used

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  • Preparation method for monatomic ion dispersed oxygen reduction electro-catalyst
  • Preparation method for monatomic ion dispersed oxygen reduction electro-catalyst

Examples

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Embodiment 1

[0041] Example 1: with g-C 3 N 4 Method for preparing monoatomic iron-dispersed electrocatalysts as starting materials

[0042] 1) Weigh 3g of urea, put it into a tube furnace, raise the temperature at a rate of 3°C per minute, keep it at 550°C for 2 hours, and then cool down automatically.

[0043] 2) Weigh the product g-C synthesized in 0.3g step (1) 3 N 4 , add 30ml of deionized water, ultrasonic for half an hour, and stir for 1.5 hours.

[0044] 3) Add 0.3 g of polyether F127 to the product of step (2), and stir for 2 hours.

[0045] 4) Add 1ml of 0.298M FeCl to the solution of step (3) 3 The solution was stirred for 8 hours, and the temperature was raised to 100°C in a heated stirrer to naturally stir and air-dry.

[0046] 5) Put the above-mentioned dried powder into a tube furnace for carbonization, and the temperature rises to 800°C (increase at a rate of 2°C per minute, and keep at 800°C for 2 hours), take out the carbonized product, and soak it in 5ml of 1M HCl ...

Embodiment 3

[0052] Example 3: with g-C 3 N 4 Method for preparing nanoparticle iron, nitrogen co-doped carbon electrocatalyst as raw material

[0053] 1) Weigh 3g of urea, put it into a tube furnace, raise the temperature at a rate of 3°C per minute, keep it at 550°C for 2 hours, and then cool down automatically.

[0054] 2) Weigh the product g-C synthesized in 0.3g step (1) 3 N 4 , add 30ml of deionized water, ultrasonic for half an hour, and stir for 1.5 hours.

[0055] 3) Add 0.3 g of polyether F127 to the product of step (2), and stir for 2 hours.

[0056] 4) Add 5ml, 0.298M FeCl to the solution of step (3) 3 The solution was stirred for 8 hours, and the temperature was raised to 100°C in a heated stirrer to naturally stir and air-dry.

[0057] 5) Put the above-mentioned dried powder into a tube furnace for carbonization, and the temperature rises to 800°C (increase at a rate of 2°C per minute, and keep at 800°C for 2 hours), take out the carbonized product, and soak it in 5ml o...

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Abstract

The invention relates to a preparation method for a monatomic ion dispersed oxygen reduction electro-catalyst and belongs to the technical field of electro-catalysis. The method comprises the following steps: by taking low-cost and nitrogen-rich g-C3N4 as a raw material, adding surfactant and iron source and performing high-temperature pyrolysis, thereby acquiring the monatomic ion dispersed oxygen reduction electro-catalyst. The catalyst has the characteristics, such as, simple compounding method, no pollution and low-cost and easily acquired reactants. The prepared catalyst has electrochemical properties equivalent with platinum carbon under acidic condition and has wide application prospect.

Description

technical field [0001] The invention relates to a new preparation method of a monoatomic iron dispersed oxygen reduction electrocatalyst, belonging to the technical field of electrocatalysis. Background technique [0002] With the massive burning and emission of fossil fuels, human beings are facing major problems of environmental degradation and energy shortage. Therefore, finding and developing a green, environmentally friendly and sustainable clean energy is the main task of current researchers. As a new type of energy source, a fuel cell is a power generation device that directly converts chemical energy into electrical energy through an electrochemical reaction. The oxidation reaction of hydrogen occurs at the anode of the battery, and the reduction reaction of oxygen occurs at the cathode. The entire reaction process of the fuel cell The only product in the water is water, which does not bring any complicated side reactions and by-products. It has the advantages of hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9041H01M4/9083Y02E60/50
Inventor 曹达鹏杨柳吕延龙王迪
Owner BEIJING UNIV OF CHEM TECH
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