A kind of preparation method of nitrogen-doped graphene-supported ir-ru catalyst for spe electrolysis cell

A nitrogen-doped graphene and catalyst technology, applied in the direction of 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 achieve an improvement The effect of performance and stability, cost reduction, and simple process

Active Publication Date: 2022-07-26
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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  • A kind of preparation method of nitrogen-doped graphene-supported ir-ru catalyst for spe electrolysis cell
  • A kind of preparation method of nitrogen-doped graphene-supported ir-ru catalyst for spe electrolysis cell
  • A kind of preparation method of nitrogen-doped graphene-supported ir-ru catalyst for spe electrolysis cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]1. Preparation of catalyst

[0047] 1. Dissolve 1g graphene in 10ml of melamine aqueous solution with a concentration of 0.03g / mL, immerse it for 10h, place it in a vacuum drying oven at 80°C for 15h, and place it in N 2 Heat treatment at 500 °C for 2 h in an atmosphere, and grind for later use.

[0048] 2. Take 0.18 g 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 Fluoxoic acid peroxide is used as an initiator, and tetrafluoroethylene gas is introduced for radical solution polymerization, and an appropriate amount of perfluoroSO is wound on the sphere of nitrogen-doped graphene powder. 2 F polymer.

[0049] 3. Wrap the above with an appropriate amount of perfluoroSO 2 After cleaning and drying, the nitrogen-doped graphene powder of the F polymer is immersed in an aqueous sodium hydroxide solution for hydrolysis, and the SO2 on the polymer is 2 Conv...

Embodiment 2

[0066] Preparation of catalyst

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

[0068] 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 monomer, add disazo The compound is used as an initiator, and tetrafluoroethylene gas is introduced to carry out radical solution polymerization, and an appropriate amount of perfluoro SO 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 After cleaning and drying, the nitrogen-doped graphene powder of the F polymer is immersed in an aqueous potassium hydroxide solution for hydrolysis, and the SO2 on the polyme...

Embodiment 3

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

[0078] 2. Take 0.12 g 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 Fluoxoic acid peroxide is used as an initiator, and tetrafluoroethylene gas is introduced for radical solution polymerization, and an appropriate amount of perfluoroSO is wound on the sphere of nitrogen-doped graphene powder. 2 F polymer.

[0079] 3. Wrap the above with an appropriate amount of perfluoroSO 2 After cleaning and drying, the nitrogen-doped graphene powder of the F polymer is immersed in an aqueous sodium hydroxide solution for hydrolysis, and the SO2 on the polymer is 2 Conversion...

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Abstract

The invention provides a method for preparing a nitrogen-doped graphene-supported Ir-Ru catalyst for an SPE electrolytic cell, which includes preparing nitrogen-doped graphite powder, preparing a nitrogen-doped graphite powder aggregate, and preparing nitrogen-doped graphene-supported Ir ‑Ru mixtures and preparation products. The method provided by the invention greatly improves the utilization rate of the Ir-Ru catalyst, improves the performance and stability of the Ir-Ru catalyst, has a proton transport function, and greatly reduces the cost. The technical scheme provided by the present invention adopts the method of intermittent microwave, which can well control the reaction temperature, has uniform temperature rise and good repeatability.

Description

technical field [0001] The present 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, the energy problem has become a major problem faced by the world today, and the importance of new energy materials and their utilization methods has become increasingly prominent. As a fuel cell for an efficient and clean electrochemical power generation device, the proton exchange membrane fuel cell is favored by people for its advantages of high energy conversion efficiency, no pollution, simple system structure, high energy density, and convenient fuel carrying and replenishment. [0003] The oxygen evolution catalyst of SPE electrolytic cell usually adopts platinum group noble met...

Claims

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Application Information

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Patent Type & Authority Patents(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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