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Modification and optimization method of iridium dioxide catalyst

A technology of iridium dioxide and optimization method, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., to achieve the effect of improving catalytic oxygen evolution performance, improving oxygen evolution catalytic performance, and reducing the content of elemental iridium

Active Publication Date: 2021-08-10
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, the 8 cm × 6 cm boat was sonicated for 30 min with ethanol and deionized water, respectively, and dried in an oven for use.

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

Embodiment 2

[0028] First, the 8 cm × 6 cm boat was sonicated for 30 min with ethanol and deionized water, respectively, and dried in an oven for use.

[0029] Weigh 3 g of commercial iridium dioxide catalyst, place it in a clean burning boat, and spread the catalyst evenly on the bottom surface of the burning boat. Place the burning boat containing the catalyst in the middle of the tube furnace, in an air atmosphere, at a heating rate of 2 °C / min, heat up to 900 °C for 2 hours, after the heat treatment, cool down to room temperature with the furnace, take out The catalyst sample was tested by X-ray diffractometer, and the results showed that the characteristic peak position of the sample was similar to that of standard IrO 2 The peaks are consistent, so it is known that the iridium dioxide catalyst is prepared in this example.

Embodiment 3

[0031] First, the 8 cm × 6 cm boat was sonicated for 30 min with ethanol and deionized water, respectively, and dried in an oven for use.

[0032] Weigh 5g of commercial iridium dioxide catalyst, place it in a clean burning boat, and spread the catalyst evenly on the bottom surface of the burning boat. Place the burning boat containing the catalyst in the middle of the tube furnace, in an air atmosphere, at a heating rate of 2 °C / min, heat up to 700 °C for 5 hours, and after the heat treatment, cool down to room temperature with the furnace, take out The catalyst sample was tested by X-ray diffractometer, and the results showed that the characteristic peak position of the sample was similar to that of standard IrO 2 The peaks are consistent, so it is known that the iridium dioxide catalyst is prepared in this example.

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Abstract

The invention relates to a modification and optimization method of an iridium dioxide catalyst, in particular to a modification and optimization method of a membrane electrode assembly anode catalyst in a pure water electrolysis hydrogen production technology, and belongs to the field of preparation of noble metal catalyst materials. The method comprises the steps of heating an iridium dioxide catalyst to 600-900 DEG C in an oxygen atmosphere at a heating rate of 2-10 DEG C / min, carrying out heat treatment for 2-5 hours, and after the heat treatment is finished, cooling to obtain the modified and optimized iridium dioxide catalyst, wherein the atmosphere with the oxygen does not contain gas capable of reacting with the oxygen. According to the method, the performance and the structure of the existing iridium dioxide catalyst are optimized through heat treatment, so that the iridium dioxide catalyst has good oxygen evolution catalytic activity and stability.

Description

technical field [0001] The invention relates to a modification and optimization method of an iridium dioxide catalyst, in particular to a modification and optimization method of an anode catalyst of a membrane electrode assembly of 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 the conversion, storage and utilization of energy. [0003] Pure water electrolysis hydrogen production has the characteristics of safety, environmental friendliness and no pollution, 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 developing high-performance water electrolysis technolog...

Claims

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Application Information

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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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