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A kind of preparation method and application of iridium oxide nanoparticle catalyst

A technology of nanoparticles and iridium oxide, which is applied in the field of preparation of iridium oxide nanoparticle catalysts, can solve the problems of high preparation cost, small specific surface area of ​​iridium oxide, and low catalytic activity, and achieve high Tafel slope, excellent oxygen evolution activity, and improved The effect of catalytic efficiency

Active Publication Date: 2022-07-08
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, the purpose of the present invention is to solve the problems of small iridium oxide specific surface area, low catalytic activity and high preparation cost. One of the purposes of the present invention is to provide a preparation method of iridium oxide nanoparticle catalyst

Method used

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  • A kind of preparation method and application of iridium oxide nanoparticle catalyst
  • A kind of preparation method and application of iridium oxide nanoparticle catalyst
  • A kind of preparation method and application of iridium oxide nanoparticle catalyst

Examples

Experimental program
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Embodiment 1

[0039] A preparation method of an iridium oxide nanoparticle catalyst, specifically comprising the following steps:

[0040] Step 1: The FTO conductive substrate is placed in acetone and ethanol in turn and treated with ultrasonic cleaning for 5-15 minutes, then the ultrasonically treated FTO conductive substrate is cleaned with deionized water and dried, and finally the dried FTO conductive substrate is washed with plasma The generator cleaning machine was treated in an air atmosphere for 15 minutes to obtain the treated FTO conductive substrate.

[0041] Step 2: Disperse chloroiridic acid and polyvinylpyrrolidone in deionized water to prepare a mixed solution, the mass fraction of chloroiridic acid in the mixed solution is 0.5%, and the mass fraction of polyvinylpyrrolidone is 1%. Mix the solution and uniformly coat the mixed solution on the treated FTO conductive substrate by a spin coater. When coating, the spin coater firstly distributes the glue at 500r / min for 10 second...

Embodiment 2

[0046] A preparation method of an iridium oxide nanoparticle catalyst, specifically comprising the following steps:

[0047] Step 1: The FTO conductive substrate is placed in acetone and ethanol in turn and treated with ultrasonic cleaning for 5-15 minutes, then the ultrasonically treated FTO conductive substrate is cleaned with deionized water and dried, and finally the dried FTO conductive substrate is washed with plasma The generator cleaning machine was treated in an air atmosphere for 15 minutes to obtain the treated FTO conductive substrate.

[0048] Step 2: Disperse chloroiridic acid and polyvinylpyrrolidone in deionized water to prepare a mixed solution. The mass fraction of chloroiridic acid and polyvinylpyrrolidone in the mixed solution is 20%, and the mass fraction of polyvinylpyrrolidone is 20%. Mix the solution and uniformly coat the mixed solution on the treated FTO conductive substrate by a spin coater. When coating, the spin coater firstly distributes the glue ...

Embodiment 3

[0053] A preparation method of an iridium oxide nanoparticle catalyst, specifically comprising the following steps:

[0054] Step 1: The FTO conductive substrate is placed in acetone and ethanol in turn and treated with ultrasonic cleaning for 5-15 minutes, then the ultrasonically treated FTO conductive substrate is cleaned with deionized water and dried, and finally the dried FTO conductive substrate is washed with plasma The generator cleaning machine was treated in an air atmosphere for 15 minutes to obtain the treated FTO conductive substrate.

[0055] Step 2: Disperse chloroiridic acid and polyvinylpyrrolidone in deionized water to prepare a mixed solution, the mass fraction of chloroiridic acid in the mixed solution is 5%, and the mass fraction of polyvinylpyrrolidone is 10%. Mix the solution and uniformly coat the mixed solution on the treated FTO conductive substrate by a spin coater. When coating, the spin coater firstly distributes the glue at 500r / min for 10 seconds...

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Abstract

The invention discloses a preparation method and application of an iridium oxide nanoparticle catalyst. In the invention, a mixed solution comprising a polymer and an iridium-containing compound is uniformly coated on the treated conductive substrate, and then calcined in an air atmosphere to allow the When the iridium-containing compound is converted into iridium oxide, the polymer is decomposed, and the iridium oxide nanoparticle material with small particle size, amorphous and porous structure is obtained, and the polymer remaining on the iridium oxide nanoparticle material is removed by a plasma generator. , enriching the surface of iridium oxide nanoparticles with hydroxyl groups. The invention utilizes the thin film formed by the polymer in the mixed solution to solve the problem of agglomeration to form large particles when the iridium-containing compound is calcined to generate iridium oxide nanoparticles, thereby obtaining iridium oxide nanoparticles with small particle size. In addition, the present invention also uses a plasma generator to remove the polymer remaining in the calcination process, so as to increase the contact area of ​​the iridium oxide nanoparticles, thereby improving the catalytic efficiency of the iridium oxide nanoparticles.

Description

technical field [0001] The invention belongs to the field of electrochemical decomposition of water with precious metal catalysts to produce hydrogen and oxygen evolution, and in particular relates to a preparation method and application of an iridium oxide nanoparticle catalyst. Background technique [0002] With the rapid consumption of non-renewable energy such as coal, oil and natural gas and the increasingly severe environmental pollution problem, people urgently need to use renewable and clean energy such as wind energy and solar energy to replace fossil fuels. Due to the discontinuity and volatility of natural factors such as wind and solar energy, it is necessary to vigorously develop efficient and low-cost energy conversion and storage technologies, such as the use of energy storage devices such as lithium-ion batteries or electrolysis of water to produce hydrogen. Due to its high calorific value, cleanliness and no pollution, hydrogen is the most ideal green energy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J37/34B01J37/02B01J37/08B01J35/10C01G55/00B82Y30/00B82Y40/00C25B11/075C25B11/081C25B1/04
CPCB01J23/468B01J35/023B01J35/0033B01J35/1004B01J37/349B01J37/343B01J37/0215B01J37/08C01G55/004C25B1/04C01P2006/40C01P2004/64C25B11/075Y02E60/36Y02P20/133
Inventor 蔡金光关宏泰吕超胡存王双曾甯罗军洪石岩宋江锋张志
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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