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Iron and nitrogen doped carbon black catalyst and preparation method thereof

A catalyst and co-doping technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of complex preparation methods and high equipment requirements, and achieve broad application prospects and high oxygen reduction activity , The effect of promoting the commercialization process

Active Publication Date: 2014-07-23
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the technical problem that the preparation method of the carbon-supported oxygen reduction catalyst is complex and requires high equipment in the prior art, and provides an iron-nitrogen co-doped with a simple preparation method and high oxygen reduction activity Carbon black catalyst and preparation method thereof

Method used

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  • Iron and nitrogen doped carbon black catalyst and preparation method thereof
  • Iron and nitrogen doped carbon black catalyst and preparation method thereof
  • Iron and nitrogen doped carbon black catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put 0.1g of Black Pearl 2000 (hereinafter referred to as BP 2000) and 0.5g of melamine into a high-speed shimmy ball mill (Nanjing Yifan, model GM-3B), and high-speed ball mill for 4 hours. After the temperature of the ball mill tank dropped to room temperature, the obtained mixed powder containing carbon, nitrogen and iron was placed in a single-temperature zone slide rail furnace, and heated at 1.01×10 5 pa, high temperature treatment at 900°C for 1 hour to obtain iron and nitrogen co-doped carbon black catalyst. After the temperature drops to room temperature, take it out and set aside. Measured by ICP: the ratio of carbon, nitrogen and iron atoms is 10:1:0.5.

[0040]Add 5 mg of the above-prepared iron-nitrogen co-doped carbon black catalyst to 100 μL of Nafion solution with a mass concentration of 5%, and ultrasonically disperse for 30 min to obtain a solution; 10 μL of the solution is drip-coated on a rotating disk electrode, and dried at room temperature Finall...

Embodiment 2

[0044] Put 0.1g of BP 2000 and 1g of melamine into a high-speed pendulum-type ball mill (Nanjing Yifan, model GM-3B), and perform high-speed ball milling for 4 hours. After the temperature of the ball mill tank dropped to room temperature, the obtained mixed powder containing carbon, nitrogen and iron was placed in a single-temperature zone slide rail furnace, and heated at 1.01×10 5 pa, high temperature treatment at 900°C for 1 hour to obtain iron and nitrogen co-doped carbon black catalyst. After the temperature drops to room temperature, take it out and set aside. Measured by ICP: The ratio of carbon, nitrogen and iron atoms is 10:3:1.

[0045] Add 5 mg of the above-prepared iron-nitrogen co-doped carbon black catalyst to 100 μL of Nafion solution with a mass concentration of 5%, and ultrasonically disperse for 30 min to obtain a solution; 10 μL of the solution is drip-coated on a rotating disk electrode, and dried at room temperature Finally, the thin film electrode is o...

Embodiment 3

[0049] Put 0.1g of BP 2000 and 2g of melamine into a high-speed pendulum-type ball mill (Nanjing Yifan, model GM-3B), and perform high-speed ball milling for 7 hours. After the temperature of the ball mill tank dropped to room temperature, the obtained mixed powder containing carbon, nitrogen and iron was placed in a single-temperature zone slide rail furnace, and heated at 1.01×10 5 pa, high temperature treatment at 900°C for 5 hours to obtain iron and nitrogen co-doped carbon black catalyst. After the temperature drops to room temperature, take it out and set aside. Measured by ICP: The ratio of carbon, nitrogen and iron atoms is 10:5:1.

[0050] Add 5 mg of the above-prepared iron-nitrogen co-doped carbon black catalyst to 100 μL of Nafion solution with a mass concentration of 5%, and ultrasonically disperse for 30 min to obtain a solution; 10 μL of the solution is drip-coated on a glassy carbon electrode, and after drying at room temperature , to obtain a thin-film elect...

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Abstract

The invention relates to an iron and nitrogen co-doped carbon black catalyst and a preparation method thereof. The method solves the technical problems that the preparation method of the carbon-supported oxygen reduction catalyst in the prior art is complicated and requires high equipment. The catalyst provided by the present invention uses ball milling technology to mix carbon black and melamine evenly. Due to the use of ball milling technology to dope iron atoms, and then high temperature treatment, iron and nitrogen atoms are doped into the layered structure of carbon black to form Iron and nitrogen co-doped carbon black catalyst, the catalyst has high oxygen reduction activity, its oxygen reduction onset potential and half-wave potential are much higher than commercial platinum-based catalysts with a platinum content of 20%, and are also higher than existing Carbon-supported oxygen reduction catalysts have higher oxygen reduction activity. The preparation method of the iron and nitrogen co-doped carbon black catalyst provided by the invention is simple and easy, and the cost is low. Therefore, this type of oxygen reduction catalyst is suitable for preparing fuel cells.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an iron and nitrogen co-doped carbon black catalyst and a preparation method thereof. Background technique [0002] Fuel cells, such as proton exchange membrane fuel cells and direct methanol fuel cells, are widely used in electric vehicle power sources, mobile power sources, and micro power sources due to their advantages such as environmental friendliness, quick start, no electrolyte loss, long life, high power density and energy density. and small power generation devices have shown broad application prospects. For fuel cells, the oxygen reduction reaction at the cathode is the rate-determining step of the electrocatalytic reaction of the fuel cell. To increase the speed of the cathode oxygen reduction reaction, an oxygen reduction catalyst must be used. At present, carbon-supported platinum and platinum alloy catalysts are the most widely used fuel cell oxygen reduction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
CPCY02E60/50
Inventor 徐维林孙秀娟刘京
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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