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A kind of modification optimization method of iridium dioxide catalyst

A technology of iridium dioxide and optimization method, which is applied in the direction of electrolytic components, electrodes, electrolytic process, etc., to achieve the effect of reducing the content of impurities, reducing the content of elemental iridium, and optimizing the crystal lattice

Active Publication Date: 2022-03-25
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Heat treatment is a treatment method for catalyst materials, but the method of optimizing the performance and structure of iridium dioxide catalysts through heat treatment has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, a 8 cm x 6 cm boat was ultrasonicated with ethanol and deionized water for 30 min, and dried in an oven for later use.

[0026] Weigh 3g of commercial iridium dioxide catalyst, place it in a clean burning boat, and spread the catalyst evenly on the bottom of the burning boat. Place the burning boat containing the catalyst in the middle of the tube furnace, heat up to 700°C for 3 hours at a heating rate of 5°C / min in an air atmosphere, and cool to room temperature with the furnace after the heat treatment, and take it out Catalyst sample, it carries out X-ray diffractometer test, and the result shows that the characteristic peak position of described sample and standard IrO 2 The peaks are consistent, so it is known that the iridium dioxide catalyst has been prepared in this embodiment.

Embodiment 2

[0028] First, a 8 cm x 6 cm boat was ultrasonicated with ethanol and deionized water for 30 min, and dried in an oven for later use.

[0029] Weigh 3g of commercial iridium dioxide catalyst, place it in a clean burning boat, and spread the catalyst evenly on the bottom of the burning boat. Place the burning boat containing the catalyst in the middle of the tube furnace, and heat it up to 900°C for 2 hours at a rate of 2°C / min in an air atmosphere. After the heat treatment, cool it down to room temperature with the furnace, and take it out. Catalyst sample, it carries out X-ray diffractometer test, and the result shows that the characteristic peak position of described sample and standard IrO 2 The peaks are consistent, so it is known that the iridium dioxide catalyst has been prepared in this embodiment.

Embodiment 3

[0031] First, a 8 cm x 6 cm boat was ultrasonicated with ethanol and deionized water for 30 min, and dried in an oven for later use.

[0032] Weigh 5g of commercial iridium dioxide catalyst, place it in a clean burning boat, and spread the catalyst evenly on the bottom of the burning boat. Place the burning boat containing the catalyst in the middle of the tube furnace, and heat it up to 700°C for 5 hours at a rate of 2°C / min in an air atmosphere. After the heat treatment, cool down to room temperature with the furnace and take it out. Catalyst sample, it carries out X-ray diffractometer test, and the result shows that the characteristic peak position of described sample and standard IrO 2 The peaks are consistent, so it is known that the iridium dioxide catalyst has been prepared in this embodiment.

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PUM

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Abstract

The invention relates to a method for modifying and optimizing an iridium dioxide catalyst, in particular to a method for modifying and optimizing an anode catalyst of a membrane electrode assembly in pure water electrolysis hydrogen production technology, and belongs to the field of preparation of precious metal catalyst materials. The steps of the method are as follows: heat the iridium dioxide catalyst to 600°C to 900°C for 2h to 5h at a heating rate of 2°C / min to 10°C / min in an atmosphere of oxygen, and cool it after the heat treatment is completed. A modified and optimized iridium dioxide catalyst is obtained; the atmosphere with oxygen cannot contain gas that can react with oxygen. The method optimizes the performance and structure of the existing iridium dioxide catalyst through heat treatment, so that it has good oxygen evolution catalytic activity and stability.

Description

technical field [0001] The invention relates to a method for modifying and optimizing an iridium dioxide catalyst, in particular to a method for modifying and optimizing an anode catalyst of a membrane electrode assembly in pure water electrolysis hydrogen production technology, and belongs to the field of preparation of precious metal catalyst materials. Background technique [0002] Hydrogen production by water electrolysis is a relatively "green" hydrogen production route among many hydrogen production technologies, which can effectively realize energy conversion, storage and utilization. [0003] Pure water electrolysis hydrogen production has the characteristics of safety, environmental friendliness and pollution-free, etc., but the electrolysis process has high energy consumption and high cost, which greatly limits the market application of pure water electrolysis hydrogen production technology. The key to the development of high-performance water electrolysis technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/075
CPCC25B1/04Y02E60/36
Inventor 吴笑雨魏海兴王杰鹏张晓辉宋时莉宋金磊李黎明岳飞飞孙岳涛
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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