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Silica doped modified insoluble iridium oxide anode and preparation method thereof

A technology of iridium dioxide and silicon dioxide, used in electrodes, solid-state chemical plating, coatings, etc., can solve problems such as chemical stability to be improved, and achieve fine grain size, reduced preparation and use costs, and oxygen evolution electroplating. High catalytic activity

Inactive Publication Date: 2009-10-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] IrO 2 The improver (inert oxide) of active oxide coating mainly includes TiO 2 、 Ta 2 o 5 , SnO 2 、Co 2 o 3 , PtO x (platinum oxides), etc.; however, their chemical stability needs to be improved

Method used

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  • Silica doped modified insoluble iridium oxide anode and preparation method thereof
  • Silica doped modified insoluble iridium oxide anode and preparation method thereof
  • Silica doped modified insoluble iridium oxide anode and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031]The 90mm×18mm titanium substrate after sand blasting was washed with alkali at 60-80°C for 30 minutes to remove oil, then soaked in boiling oxalic acid solution with a mass fraction of 10% for 30 minutes, and finally ultrasonically cleaned in deionized water and blown. Dry and set aside. Weigh a certain amount of gas-phase SiO with an average diameter of ~10 nm 2 Dissolve the powder in a 1:1 ethanol-isopropanol solvent, weigh a certain amount of H 2 IrCl 6 ·6H 2 O was dissolved in a 1:1 ethanol / isopropanol solvent, and then the two solutions were mixed with each other, and then ultrasonically mixed for 10 min to prepare a precursor coating solution. The above coating solution was coated on the pretreated titanium substrate, dried at 90°C for 10 minutes, sintered at 500°C for 10 minutes, then taken out and cooled to room temperature. Coating, drying and sintering are carried out again, and this cycle is repeated 10 times, and finally sintering at 500° C. for 1 hour. ...

Embodiment 2

[0038] Wash the borax-treated titanium substrate of 90mm×18mm with alkali at 60-80°C for 30 minutes to remove oil, then soak it in boiling oxalic acid solution with a mass fraction of 10% for 30 minutes, and finally ultrasonically clean it in deionized water and dry it for later use . Take by weighing a certain amount of methyltrimethoxysilane monomer (structural formula is: CH 3 -Si-(OCH 3 ) 3 ) was dissolved in 1:1 ethanol isopropanol solvent, weighed a certain amount of H 2 IrCl 6 ·6H 2 O was dissolved in a 1:1 ethanol-isopropanol solvent, and then the two solutions were mixed with each other, and then ultrasonically mixed for 10 minutes to prepare a precursor coating solution. The above coating solution was coated on the pretreated titanium substrate, dried at 90°C for 10 minutes, sintered at 500°C for 10 minutes, then taken out and cooled to room temperature. Coating, drying and sintering are carried out again, and this cycle is repeated 10 times, and finally sinter...

Embodiment 3

[0045] Wash the borax-treated titanium substrate of 90mm×18mm with alkali at 60-80°C for 30 minutes to remove oil, then soak it in boiling oxalic acid solution with a mass fraction of 10% for 30 minutes, and finally ultrasonically clean it in deionized water and dry it for later use . A certain amount of methyltriethoxysilane monomer was weighed and dissolved in ethanol, and diluted ammonia solution was slowly added dropwise, left standing overnight, and filtered to obtain silica sol. Dissolve this silica sol in 1:1 ethanol isopropanol, and weigh a certain amount of H 2 IrCl 6 ·6H 2 O was dissolved in a 1:1 ethanol-isopropanol solvent, and then the two solutions were mixed with each other, and then ultrasonically mixed for 10 minutes to prepare a precursor coating solution. The above coating solution was coated on the pretreated titanium substrate, dried at 100°C for 10 minutes, sintered at 500°C for 10 minutes, then taken out and cooled to room temperature. Coating, dryin...

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Abstract

The invention discloses silica doped modified insoluble iridium oxide anode and preparation method thereof, wherein the silica doped modified insoluble iridium oxide anode comprises a titanium base body and a layer of iridium oxide active coating doped with silica nano constituent coated on the surface of the titanium base body. The preparation method is simple. The grain of the SiO2 doped modified insoluble iridium oxide anode coatings is fine and the coatings is in porosity characteristic. The oxygen evolution electrocatalysis of anode is high and the service life of the anode is longer. The SiO2 is used for replacing the large amount of noble metal oxide, thus the preparation and use cost of the anode is greatly reduced.

Description

technical field [0001] The invention relates to an insoluble anode with high electrocatalysis and long life for the anode reaction to generate oxygen, in particular to a silicon dioxide doped and modified insoluble iridium dioxide anode and a preparation method thereof. Background technique [0002] The anode material is the most critical component in the electrochemical industry. This is because: (1) the anode material is the place for the anode reaction. From the perspective of saving electric energy, it is required to have high electrochemical activity for the catalyzed anode reaction, that is, to have a low (2) In addition to the above requirements, ordinary anode materials often undergo anodic oxidation and dissolution during use, which affects long-term performance. Therefore, for anode materials, the material itself is particularly required to have high chemical stability. sex. The electrochemical industry in which the anode reaction is oxygen is the majority, such a...

Claims

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Application Information

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IPC IPC(8): C25B11/10C23C20/08
Inventor 胡吉明王晓梅张鉴清曹楚南
Owner ZHEJIANG UNIV
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