Fe/PIL/MWCNTs fuel cell catalyst and preparation method thereof

A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as the gap in catalytic activity and stability, and achieve the effects of expanding types, simple methods, and simple preparation methods

Inactive Publication Date: 2018-08-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, despite a lot of work in this area and some good results, there is still a large gap in the catalytic activity and stability of non-platinum catalysts compared with commercial platinum-carbon catalysts, so continue to improve The preparation method of non-platinum nitrogen-doped carbon-based electrocatalysts, finding new nitrogen-doped sources and modifying them to reduce the cost of nitrogen-doped carbon-based electrocatalysts and improve their catalytic activity and stability are still the research focus in this field

Method used

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  • Fe/PIL/MWCNTs fuel cell catalyst and preparation method thereof
  • Fe/PIL/MWCNTs fuel cell catalyst and preparation method thereof
  • Fe/PIL/MWCNTs fuel cell catalyst and preparation method thereof

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Effect test

Embodiment 1

[0027] (1) Take 1g of multi-walled carbon nanotubes and place them in a 250mL three-necked flask, pour 100mL of concentrated nitric acid into it, and pickle at 118°C for 6 hours. into a 250mL three-necked flask, pour 100mL concentrated hydrochloric acid and pickle at 105°C for 6h, cool to room temperature after the reaction and filter, then wash with deionized water until neutral, and dry in a vacuum oven at 50°C. acidified multi-walled carbon nanotubes.

[0028] (2) Add 9.00g of 1-vinylimidazole, 28.88g of bromoethane and 50mL of acetonitrile into a 100mL three-necked flask equipped with a nitrogen valve, a magnet, and a condenser, and put it in an oil bath at 70°C under nitrogen protection for 24 hours, and react Immediately after the end, transfer the solution to a beaker and add a certain amount of diethyl ether until a white solid precipitates out of the solution, then filter and wash with diethyl ether for 3 times, and finally put the white product at 50°C for vacuum dry...

Embodiment 2

[0033] (1) step is general embodiment 1

[0034] (2) step is general embodiment 1

[0035] (3) steps pass embodiment 1

[0036] (4) Add the MWCNTs in step (1) and the PIL in step (3) in the ratio of mass ratio 1:3.75, 1:7.5, 1:11.25, 1:15 respectively in the 250mL three-neck flask, wherein in each ratio 0.4g of MWCNTs, and 60mL of ethanol was added for dispersion and dissolution, another 2.98g of Fe(NO3)3·9H2O was dissolved in 50mL of ethanol to obtain an ethanol solution of ferric nitrate, and then this solution was dropped into the three-necked flask for mixing solution, reacted at room temperature for 12 hours, then centrifuged the product, washed with alcohol, dried in a vacuum oven at 50°C for 8 hours, and ground into powder to obtain Fe / PIL / MWCNTs catalyst precursors with different nitrogen contents.

[0037] (5) Put the catalyst precursor in the step (4) into the tube furnace for pyrolysis, and pass N before heating up. 2 Exhaust the air in the tube furnace, then rai...

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Abstract

The invention discloses a Fe/PIL/MWCNTs fuel cell catalyst and a preparation method thereof, and belongs to the technical field of a fuel cell catalyst. A certain amount of poly(brominated 1-vinyl imidazole) ion liquid prepared through polymerization is dissolved into ethyl alcohol, and then acidized multi-wall carbon nanotubes are added to be stirred and dispersed, and next, a prepared ferric nitrate ethanol solution is dropwise added to the dispersion liquid to be stirred at a certain temperature for a certain time, and then, centrifuging, washing and drying are performed to prepare a Fe/PIL/MWCNTs catalyst precursor; and the precursor is sent to a tubular furnace to be subjected to high-temperature pyrolysis for a certain time at certain nitrogen flowing speed, and the obtained productis subjected to acid washing treatment in a dilute nitric acid solution, and then filtering, washing and drying are performed to obtain the Fe/PIL/MWCNTs catalyst. The preparation method is simple, and the prepared catalyst has relatively high catalytic activity and stability and has wide application prospect in the field of the fuel cell.

Description

technical field [0001] The invention relates to the preparation of non-platinum fuel cell electrocatalysts, in particular to a method for preparing Fe / PIL / MWCNTs catalysts, and belongs to the technical field of fuel cell catalysts. Background technique [0002] As a new type of sustainable alternative energy that cannot be ignored, proton exchange membrane fuel cells are considered to be the main way to solve the current environmental pollution and energy crisis due to their high conversion efficiency, low pollution, low noise, environmental friendliness, and easy portability. one. The main factor affecting the performance of proton exchange membrane fuel cells is the oxygen reduction reaction at the cathode. Traditionally, platinum-based materials are the most widely used catalyst materials for the oxygen reduction reaction. Platinum-based material catalysts have high catalytic performance under both acidic and alkaline conditions, but platinum is a precious metal with few...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 于书平吴伟林朱红韩克飞汪中明
Owner BEIJING UNIV OF CHEM TECH
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