Preparation method of nitrogen-doped graphene loaded Ir-Ru catalyst for SPE electrolytic cell

A nitrogen-doped graphene, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem that the actual utilization rate of Ir-Ru catalyst is less than 30%, and improve the Performance and stability, good reaction temperature, small size effect

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 Ir-Ru 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 Ir-Ru catalyst being less than 30%. %

Method used

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  • Preparation method of nitrogen-doped graphene loaded Ir-Ru catalyst for SPE electrolytic cell
  • Preparation method of nitrogen-doped graphene loaded Ir-Ru catalyst for SPE electrolytic cell
  • Preparation method of nitrogen-doped graphene loaded Ir-Ru catalyst for SPE electrolytic cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]1. Preparation of catalyst

[0047] 1. Dissolve 1g of graphene 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.

[0048] 2. Take 0.18g of the treated graphene powder and place it in an autoclave, add an aqueous solution of perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride (PSVE) monomer, add all Fluoxalic 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 graphene powder. 2 F polymer.

[0049] 3. Wrap the above with an appropriate amount of perfluoroSO 2 The nitrogen-doped graphene powder of F macromolecule is washed and dried, then immersed in aqueous sodium hydroxide solution for hydrolysis, and the SO on the macromolecule 2 F ...

Embodiment 2

[0066] Catalyst preparation

[0067] 1. Dissolve 1g of XC-72 graphene carrier in 15ml of melamine solution with a concentration of 0.03g / mL, soak for 10h, then dry in a vacuum oven at 80°C for 15h, and place in 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 graphene powder and place it in an autoclave, add the aqueous solution of perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride monomer, and add bis-azo The compound is used as an initiator, and tetrafluoroethylene gas is passed through to carry out free radical solution polymerization, and an appropriate amount of perfluoroSO4 is wound on the sphere of nitrogen-doped graphene powder. 2 F polymer.

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

Embodiment 3

[0077] 1. Dissolve 1g of EC-300 graphene carrier in 20mL of pyridine aqueous solution with a concentration of 0.05g / mL, soak for 10h, dry in a vacuum oven at 80°C for 15h, and place in 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 graphene powder and place it in an autoclave, add an aqueous solution of perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride (PSVE) monomer, add all Fluoxalic 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 graphene powder. 2 F polymer.

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

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Abstract

The invention provides a preparation method of a nitrogen-doped graphene loaded Ir-Ru catalyst for a SPE electrolytic cell. The preparation method of the nitrogen-doped graphene loaded Ir-Ru catalystfor a SPE electrolytic cell comprises the steps of preparing nitrogen-doped graphite powder, preparing nitrogen-doped graphite powder polymer, preparing nitrogen-doped graphene loaded Ir-Ru mixed liquid and preparing a product. By the provided method, the utilization rate of the Ir-Ru catalyst is greatly increased, the performance and stability of the Ir-Ru catalyst is improved, the catalyst has aproton transfer function, and the cost is greatly reduced. According to the technical scheme, an intermittent microwave mode is adopted, reaction temperature can be controlled quite well, temperatureincreasing is uniform, and repeatability is good.

Description

technical field [0001] The invention relates to the technical field of new energy and fuel cells, in particular to a method for preparing a nitrogen-doped carbon-supported platinum base with a proton transport function for a fuel cell and a catalyst prepared therefrom. 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, the proton exchange membrane fuel cell is favored by people because of its high energy conversion efficiency, no pollution, simple system structure, high energy density, and convenient fuel portability. [0003] The oxygen evolution catalyst of the SPE electrolytic cell usually adopts the platinum group noble metal or its oxide with small o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J31/10B01J35/10B01J37/08B01J37/30B01J37/34
CPCB01J27/24B01J31/10B01J35/0033B01J35/006B01J35/0066B01J35/1019B01J37/084B01J37/30B01J37/346
Inventor 刘锋刘少名杜兆龙梁丹曦侯继彪赵波
Owner STATE GRID CORP OF CHINA
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