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Nitrogen-doped carbon-loaded platinum-based catalyst as well as preparation method and application thereof

A nitrogen-doped carbon and catalyst technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of uneven catalyst morphology, unfavorable catalytic activity and durability, and achieve low cost, improved stability, and reduced platinum The effect of dosage

Inactive Publication Date: 2020-05-08
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the present invention has the advantages of simple operation, rapid reaction, less energy consumption, low cost, and is easy to realize large-scale industrial production, but the catalyst prepared by the method is uneven in appearance, which has an adverse effect on its catalytic activity and durability

Method used

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  • Nitrogen-doped carbon-loaded platinum-based catalyst as well as preparation method and application thereof
  • Nitrogen-doped carbon-loaded platinum-based catalyst as well as preparation method and application thereof
  • Nitrogen-doped carbon-loaded platinum-based catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] For the nitrogen-doped carbon-supported platinum-based catalyst provided in this embodiment, the mass fraction of platinum is 87% based on the mass of the nitrogen-doped carbon-supported platinum-based catalyst as 100%; As 100%, the mass fraction of nitrogen is 6.3%;

[0083] The preparation method of the nitrogen-doped carbon-supported platinum-based catalyst comprises the following steps:

[0084] 1) Weigh 1g of polyacrylonitrile powder into a conical flask, add 5mL of N,N-dimethylformamide, stir in an oil bath at 60°C for 4h until uniform, then pump the polyacrylonitrile solution into the spinning nozzle, set the spinning The distance between the spinning head and the receiver is 20cm, and a high voltage of 15kV is applied between the spinning head and the receiver, and electrospinning is performed under this voltage;

[0085] 2) After 5 h of electrospinning process, the obtained fiber membrane was removed from the receiver and transferred to a tube furnace. In nitr...

Embodiment 2

[0091] For the nitrogen-doped carbon-supported platinum-based catalyst provided in this embodiment, the mass fraction of platinum is 70% based on the mass of the nitrogen-doped carbon-supported platinum-based catalyst as 100%; As 100%, the mass fraction of nitrogen is 8.2%;

[0092] The preparation method of the nitrogen-doped carbon-supported platinum-based catalyst comprises the following steps:

[0093] 1) Weigh 5g of polyvinylpyrrolidone into a conical flask, add 50mL of ethanol, stir in an oil bath at 120°C for 2h, then pump the polyvinylpyrrolidone solution into the spinning nozzle, and set the distance between the spinning nozzle and the receiver to be 20cm, A 20kV high voltage is applied between the spinning head and the receiver, and electrospinning is performed under this voltage;

[0094] 2) After 10 h of electrospinning process, the obtained particle film was removed from the receiver, transferred to a tube furnace, and calcined at a high temperature under the pro...

Embodiment 3

[0098] For the nitrogen-doped carbon-supported platinum-based catalyst provided in this embodiment, the mass fraction of platinum is 60% based on the mass of the nitrogen-doped carbon-supported platinum-based catalyst as 100%; For 100%, the mass fraction of nitrogen is 7%;

[0099] The preparation method of the nitrogen-doped carbon-supported platinum-based catalyst comprises the following steps:

[0100] 1) Weigh 3.5g of polyurethane powder into a conical flask, add 38mL of dimethyl sulfoxide, stir in an oil bath at 100°C for 2h, then pump the polyurethane solution into the spinning nozzle, and set the distance between the spinning nozzle and the receiver to be 20cm, 15kV high voltage is loaded between the spinning head and the receiver, and electrospinning is carried out under this voltage;

[0101] 2) After 8 hours of electrospinning, the obtained particle film was removed from the receiver, transferred to a tube furnace, and calcined at a high temperature under the protec...

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Abstract

The invention relates to a nitrogen-doped carbon-loaded platinum-based catalyst as well as a preparation method and application thereof. The preparation method comprises: (1) carrying out electrostatic spinning on a polymer solution to prepare a carbon material precursor; (2) carrying out heat treatment on the carbon material precursor obtained in the step (1) in a nitrogen-containing atmosphere to obtain a nitrogen-doped carbon material; and (3) mixing the nitrogen-doped carbon material obtained in the step (2) with a platinum precursor solution, sequentially adding a first reducing agent anda second reducing agent for primary reduction and secondary reduction, separating and drying to obtain the nitrogen-doped carbon supported platinum-based catalyst, wherein the reducibility of the first reducing agent is greater than the reducibility of the second reducing agent. In a durability test of the catalyst, the catalytic performance of the catalyst is hardly attenuated after 30,000 circles of accelerated durability. The preparation method has the advantages of improvement of the stability, the durability and the catalytic activity of the catalyst, reduction of the use amount of platinum, reduction of the production cost, and high application values.

Description

technical field [0001] The invention relates to the field of new energy fuel cells, in particular to a nitrogen-doped carbon-supported platinum-based catalyst and its preparation method and application. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) have the characteristics of high energy conversion efficiency, low-temperature fast start-up, low noise, and no pollution, and are considered to be very suitable as power sources for green new energy vehicles. Proton exchange membrane fuel cell is composed of catalyst, proton membrane, gas diffusion layer and bipolar plate. The principle is that hydrogen separates protons and electrons at the anode, the protons pass through the proton exchange membrane to the cathode, and the electrons reach the cathode through an external circuit. 2 Combined under the action of the cathode catalyst to generate water, the specific electrode reaction: [0003] Anode: H 2 →2H + +2e - [0004] Cathode: 1 / 2O 2 +2H ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/88H01M4/926Y02E60/50
Inventor 于力娜朱云唐柳朱雅男张克金裴国权杨帅
Owner FAW JIEFANG AUTOMOTIVE CO
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