Preparation method of nitrogen-doped carbon-loaded platinum-based catalyst for fuel cell

A nitrogen-doped carbon and fuel cell technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problem that the actual utilization rate of Pt catalyst is less than 40%, so as to improve performance and stability, improve utilization rate, and high The effect of oxygen reduction catalytic activity

Active Publication Date: 2019-04-05
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the catalytic layer prepared by Pt / C catalyst and proton exchange solution (such as Nafion D520), the ionic phase (such as Nafion polymer) is in the state of disordered nano-film, resulting in the actual utilization of Pt catalyst being less than 40%.

Method used

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  • Preparation method of nitrogen-doped carbon-loaded platinum-based catalyst for fuel cell
  • Preparation method of nitrogen-doped carbon-loaded platinum-based catalyst for fuel cell
  • Preparation method of nitrogen-doped carbon-loaded platinum-based catalyst for fuel cell

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Effect test

Embodiment 1

[0045] 1. Preparation of catalyst

[0046] 1. Dissolve 1g of EC-300 carbon black carrier in 10ml of melamine aqueous solution with a concentration of 0.03g / mL, soak it for 10h, dry it in a vacuum oven at 80°C for 15h, and place it under N 2 Heat treatment at 500°C for 2 hours under atmosphere, and grind for later use.

[0047]2. Take 0.18g of the treated carbon powder and place it in an autoclave, add the aqueous solution of perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride (PSVE) monomer, add perfluoro Carboxylic acid peroxide is used as an initiator, and tetrafluoroethylene gas is passed through for free radical solution polymerization, and an appropriate amount of perfluoroSO4 is wound on a sphere of nitrogen-doped carbon powder. 2 F polymer.

[0048] 3. Wrap the above with an appropriate amount of perfluoroSO 2 The nitrogen-doped carbon powder of F polymer is washed and dried, then immersed in aqueous sodium hydroxide solution for hydrolysis, and the SO on the poly...

Embodiment 2

[0066] Catalyst preparation

[0067] 1. Dissolve 1g of XC-72 carbon black carrier in 15ml of melamine aqueous solution with a concentration of 0.03g / mL, soak it for 10h, dry it in a vacuum oven at 80°C for 15h, and place it under N 2 Heat treatment at 500°C for 2 hours under atmosphere, and grind for later use.

[0068] 2. Take 0.12g of the treated carbon powder and place it in an autoclave, add the aqueous solution of perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride monomer, and add the bis-azo compound As an initiator, tetrafluoroethylene gas was introduced to carry out free radical solution polymerization, and an appropriate amount of perfluoroSO was wound on the sphere of nitrogen-doped carbon powder. 2 F polymer.

[0069] 3. Wrap the above with an appropriate amount of perfluoroSO 2 The nitrogen-doped carbon powder of the F polymer is washed and dried, and then immersed in an aqueous potassium hydroxide solution for hydrolysis, so that the SO on the polymer 2 F ...

Embodiment 3

[0077] 1. Dissolve 1g of EC-300 carbon black carrier in 20mL of an aqueous solution of pyridine with a concentration of 0.05g / mL, soak it for 10h, dry it in a vacuum oven at 80°C for 15h, and place it under N 2 Heat treatment at 500°C for 2 hours under atmosphere, and grind for later use.

[0078] 2. Take 0.12g of the treated carbon powder and place it in an autoclave, add an aqueous solution of perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride (PSVE) monomer, add perfluoro Carboxylic acid peroxide is used as an initiator, and tetrafluoroethylene gas is passed through for free radical solution polymerization, and an appropriate amount of perfluoroSO4 is wound on a sphere of nitrogen-doped carbon powder. 2 F polymer.

[0079] 3. Wrap the above with an appropriate amount of perfluoroSO 2 The nitrogen-doped carbon powder of F polymer is washed and dried, then immersed in aqueous sodium hydroxide solution for hydrolysis, and the SO on the polymer 2 F group converted to SO ...

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Abstract

The invention provides a preparation method of a nitrogen-doped carbon-loaded platinum-based catalyst for a fuel cell. The preparation method comprises the following steps of preparing nitrogen-dopedcarbon powder, preparing a nitrogen-doped carbon powder polymerization body, preparing a nitrogen-doped carbon-loaded platinum-based mixed solution and preparing a product. According to the method provided by the invention, the utilization rate of a Pt catalyst is greatly improved, the performance and the stability of the Pt catalyst are improved, the proton transmission function is achieved, andthe cost is greatly lowered. According to the technical scheme provided by the invention, an intermittent microwave mode is adopted, so that the reaction temperature can be well controlled, the temperature rise is uniform, and the repeatability is high.

Description

technical field [0001] The invention relates to the technical fields of new energy and fuel cells, in particular to a nitrogen-doped carbon-supported platinum-based catalyst with proton transport function for fuel cells and a preparation method thereof. Background technique [0002] With the development of the economy, the energy crisis is becoming more and more serious, and the energy problem has become a major problem facing the world today. The importance of new energy materials and their utilization methods has become increasingly prominent. As a high-efficiency and clean fuel cell for electrochemical power generation devices, proton exchange membrane fuel cells are favored by people for their high energy conversion efficiency, no pollution, simple system structure, high energy density, and convenient fuel portability and replenishment. [0003] As an important part of proton exchange membrane fuel cells, the activity and life of platinum-carbon catalysts directly affect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92
CPCH01M4/8825H01M4/9083H01M4/926Y02E60/50
Inventor 戴立森董拓朱聿晟兰莉红王辰曦宋元峰刘少名刘锋
Owner STATE GRID CORP OF CHINA
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