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Preparation method of Co-N/CNTs catalytic material, catalytic material obtained through preparation method and application of Co-N/CNTs catalytic material

A catalytic material, co-n technology, applied in biochemical fuel cells, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of slow reaction kinetics, restricted MFC performance, insufficient ORR catalyst performance, etc., to achieve easy synthesis , Improve catalytic activity and stability, good oxygen reduction activity

Pending Publication Date: 2021-08-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because ORR involves multi-electron transport, the reaction kinetics is slow, and the reaction activation energy barrier for O-O bond breaking is high (498kJ / mol), which is the rate-controlling step for MFC electricity generation. However, the current ORR catalyst performance is insufficient, which seriously restricts the performance of MFC. improve

Method used

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  • Preparation method of Co-N/CNTs catalytic material, catalytic material obtained through preparation method and application of Co-N/CNTs catalytic material
  • Preparation method of Co-N/CNTs catalytic material, catalytic material obtained through preparation method and application of Co-N/CNTs catalytic material
  • Preparation method of Co-N/CNTs catalytic material, catalytic material obtained through preparation method and application of Co-N/CNTs catalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of synthetic method of the catalytic material of Co-N / CNTs, comprises the following steps:

[0032] (1) Synthesis of ZIF-67 / CNT: 35 mg of carboxylated multi-walled carbon nanotubes and 175 mg of polyvinylpyrrolidone with a molecular weight of 10,000 were dissolved in 25 mL of methanol and ultrasonically oscillated for 0.5 h;

[0033] (2) Add 222 mg of cobalt chloride to the carbon nanotube dispersion obtained in step (1), and continue stirring for 1 hour;

[0034] (3) Dissolve 765mg of organic ligand 2-methylimidazole in 25mL of methanol solution, then add dropwise into the above mixed solution, then put it into a high-temperature reactor at 100°C, and react for 24h;

[0035] (4) The obtained product was filtered and washed several times with methanol and deionized water, then dried and ground to obtain a powder;

[0036] (5) The precursor powder prepared in step (4) was carbonized at 800°C for 2 hours under an inert atmosphere, and the heating rate was 5°C·min ...

Embodiment 2

[0041] A kind of synthetic method of the catalytic material of Co-N / CNTs, comprises the following steps:

[0042] (1) Synthesis of ZIF-67 / CNT: 35 mg of carboxylated multi-walled carbon nanotubes and 140 mg of polyvinylpyrrolidone with a molecular weight of 10,000 were dissolved in 35 mL of methanol and ultrasonically oscillated for 2.0 h;

[0043] (2) Add 222 mg of cobalt chloride to the carbon nanotube dispersion obtained in step (1), and continue stirring for 1 hour;

[0044] (3) Dissolve 560 mg of organic ligand 2-methylimidazole in 35 mL of methanol solution, then add it dropwise to the above mixed solution, and then put it in a high-temperature reactor at 100 ° C for 36 hours;

[0045] (4) The obtained product was filtered and washed several times with methanol and deionized water, then dried and ground to obtain a powder;

[0046] (5) The precursor powder prepared in step (4) was carbonized at 700 °C for 3 hours under an inert atmosphere, and the heating rate was 2.5 °C...

Embodiment 3

[0048] A kind of synthetic method of the catalytic material of Co-N / CNTs, comprises the following steps:

[0049] (1) Synthesis of ZIF-67 / CNT: 35 mg of carboxylated multi-walled carbon nanotubes and 105 mg of polyvinylpyrrolidone with a molecular weight of 10,000 were dissolved in 40 mL of ethanol and ultrasonically oscillated for 0.5 h;

[0050] (2) Add 222 mg of cobalt chloride to the carbon nanotube dispersion obtained in step (1), and continue stirring for 1 hour;

[0051] (3) Dissolve 315 mg of organic ligand 2-methylimidazole in 40 mL of methanol solution, then add it dropwise to the above mixed solution, and then put it in a high-temperature reactor at 110 ° C for 36 hours;

[0052] (4) The obtained product was filtered and washed several times with methanol and deionized water, then dried and ground to obtain a powder;

[0053] (5) The precursor powder prepared in step (4) was carbonized at 600°C for 4 hours under an inert atmosphere, and the heating rate was 1°C·min ...

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Abstract

The invention discloses a Co-N / CNTs catalytic material and a preparation method and application thereof. The method comprises the following steps: 1) dissolving carboxylated multi-walled carbon nanotubes in a methanol solution for ultrasonic treatment; (2) adding cobalt chloride into the suspension of the carbon nanotubes and performing stirring; (3) dissolving an organic ligand 2-methylimidazole into a methanol solution, then dropwise adding the mixture into the mixed solution, and then putting the mixed solution into a high-temperature reaction kettle to react; 4) filtering and washing the obtained product with methanol and ethanol for several times, and then performing drying and grinding to obtain powder; 5) performing high-temperature carbonization on the prepared powder in an inert atmosphere to prepare the Co-N / CNTs material. The invention provides the oxygen reduction reaction catalyst which is low in price, convenient and simple, has many active sites and can be widely applied, and the catalyst has excellent catalytic oxygen reduction performance under a neutral condition, can greatly improve the output power of a microbial fuel cell, and is used for improving the oxygen reduction performance and the electricity generation performance of the microbial fuel cell.

Description

technical field [0001] The invention belongs to an air cathode catalyst and a preparation method thereof, in particular to a preparation method of a Co-N / CNTs catalytic material and its application in a microbial fuel cell cathode. Background technique [0002] Energy is an important material basis for human survival and social development. In the face of a series of serious problems such as energy depletion, water shortage, and serious water pollution, it is particularly important to seek new technologies that can replace new energy sources while reducing environmental pollution. Microbial fuel cell (MFC) has emerged as a new technology, which can generate a clean energy—electric energy while treating wastewater. Among them, the air-cathode MFC has become a hot spot in current MFC research because of its great prospect of large-scale application. The electrocatalytic oxygen reduction reaction (Oxygen Reduction Reaction, ORR) of the air cathode is an important theoretical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M8/16H01M4/86
CPCH01M4/8885H01M4/8825H01M4/9083H01M4/9041H01M4/9008H01M8/16H01M2004/8684Y02P70/50Y02E60/50
Inventor 娄永兵王晴晴
Owner SOUTHEAST UNIV
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