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Preparation method of seawater electrolytic reaction anode IrO2-RuO2-SnO2-TiO2 nanoparticle coating

An iro2-ruo2-sno2-tio2, nanoparticle technology, applied in electrodes, coatings, electrolysis processes, etc., can solve the problems of expensive active components, uneven distribution of components, and uncertain degree of oxidation, and achieve excellent electrical properties. The effect of catalytic activity and stability, and simple preparation method

Inactive Publication Date: 2011-11-23
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These precious metals have the characteristics of good reaction selectivity, strong corrosion resistance, and difficult passivation, but their active components are very expensive, and the high cost will limit their future development to a certain extent
[0005] At present, industrial titanium anodes are still mainly prepared by thermal decomposition method, which is very easy to cause defects such as structure structure, uneven distribution of components, and uncertain oxidation degree of titanium anodes.

Method used

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  • Preparation method of seawater electrolytic reaction anode IrO2-RuO2-SnO2-TiO2 nanoparticle coating
  • Preparation method of seawater electrolytic reaction anode IrO2-RuO2-SnO2-TiO2 nanoparticle coating
  • Preparation method of seawater electrolytic reaction anode IrO2-RuO2-SnO2-TiO2 nanoparticle coating

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Embodiment 1

[0032] IrO in Seawater Electrolysis 2 -RuO 2 -SnO 2 -TiO 2 The anode nanoparticle coating is prepared by an improved thermal decomposition method, comprising the following steps:

[0033] 1. Weigh 30mg of titanium dioxide nanoparticles, add 0.18g of SnCl 4 ·5H 2 O, 8ml 0.067mol / L RuCl 3 2H 2 O, 5ml 0.067mol / L H 2 IrCl 4 ·6H 2 O solution, then add 0.001 g / ml of polyacrylamide with a molecular weight of 3,000,000, stir or ultrasonically oscillate to make it evenly mixed to form a suspension to prepare the anode electrode coating solution;

[0034] 2. Brush the suspension prepared in step 1) on the Ti sheet, dry at 120°C, calcinate at 500°C, and cool;

[0035] 3. Repeat step 2) for about 20 times until the weight increase of the Ti sheet reaches 1.2mg / cm 2 , that is, to prepare the anode IrO 2 -RuO 2 -SnO 2 -TiO 2 Nanoparticle coating.

Embodiment 2

[0037] IrO in Seawater Electrolysis 2 -RuO 2 -SnO 2 -TiO 2 The anode nanoparticle coating is prepared by an improved thermal decomposition method, comprising the following steps:

[0038] 1. Weigh 30mg of titanium dioxide nanotubes, add 0.15g of SnCl 4 ·5H 2 O, 8ml0.067mol / L RuCl 3 2H 2 O, 6ml 0.067mol / L H 2 IrCl 4 ·6H 2 O solution, then add polyacrylamide 0.0015g / ml with a molecular weight of 3000000, stir or ultrasonically oscillate to make it evenly mixed to form a suspension, which is to prepare the anode electrode coating solution;

[0039] 2. Brush the suspension prepared in step 1) on the Ti sheet, dry at 120°C, calcinate at 500°C, and cool;

[0040] 3. Repeat step 2) for about 20 times until the weight increase of the Ti sheet reaches 1.4 mg / cm 2 , that is, to prepare the anode IrO 2 -RuO 2 -SnO 2 -TiO 2 Nanoparticle coating.

Embodiment 3

[0042] IrO in Seawater Electrolysis 2 -RuO 2 -SnO 2 -TiO 2 The anode nanoparticle coating is prepared by an improved thermal decomposition method, comprising the following steps:

[0043] 1. Weigh 30mg of titanium dioxide nanofibers, add 0.18g of SnCl 4 ·5H 2 O, 8ml 0.067mol / L RuCl 3 2H 2 O, 5ml 0.067mol / L H 2 IrCl 4 ·6H 2 O solution, then add 0.002 g / ml polyacrylamide with a molecular weight of 10000000, stir or ultrasonically oscillate to make it evenly mixed to form a suspension, which is to prepare the anode electrode coating solution;

[0044] 2. Brush the suspension prepared in step 1) on the Ti sheet, dry at 120°C, calcinate at 600°C, and cool;

[0045] 3. Repeat step 2) for about 20 times until the weight increase of the Ti sheet reaches 1.5mg / cm 2 , that is, to prepare the anode IrO 2 -RuO 2 -SnO 2 -TiO 2 Nanoparticle coating.

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Abstract

The invention relates to a preparation method of a seawater electrolytic reaction anode IrO2-RuO2-SnO2-TiO2 nanoparticle coating. The seawater electrolytic reaction anode IrO2-RuO2-SnO2-TiO2 nanoparticle coating is prepared by the following improved thermal decomposition method: mixing soluble SnIV, RuIII and IrIV salt solution and titanium dioxide, adding high molecular polymer, and stirring or carrying out supersonic oscillation to form a suspension, thereby obtaining the anode coating liquid; and brushing the suspension on a Ti matrix, drying, calcining, cooling, and repeating many times until the coating reaches the required thickness. The anode coating prepared by the method provided by the invention has the advantages of uniform metallic oxide particle distribution, small microcrystal particle size, large specific area, increased electrode conductivity, excellent electrocatalytic activity and high stability, and has a mud crack appearance on the surface. The preparation method provided by the invention is simple, and suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a method for preparing an anode coating for an electrolytic chlorine production reaction, in particular to a method for preparing an anode IrO for a seawater electrolysis reaction by using an improved thermal decomposition method 2 -RuO 2 -SnO 2 -TiO 2 Methods of Nanoparticle Coating. Background technique [0002] Hypochlorite, as an important component of chlorine-containing disinfectants, is usually prepared by electrolyzing saturated saline with a DSA electrode. The DSA electrode is regarded as one of the most important inventions in the field of electrochemistry in the 20th century. It originally refers to the ruthenium-titanium oxide coated electrode (Ti / RuTiO) invented by Beer in the mid-1960s. x ), which is called Dimensionally stable Anode (DSA for short) because of its good electrochemical activity and corrosion resistance stability. In recent years, more and more scholars have begun to pay attention to the elect...

Claims

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Application Information

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IPC IPC(8): C25B11/10C23C20/08C25B1/26
Inventor 陈煜梁燕周益明丁小余唐亚文陆天虹
Owner NANJING NORMAL UNIVERSITY
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