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Preparation method of TiO2-nanotube-array-supported ruthenium-containing coating catalyst

A nanotube array, coating catalyst technology, applied in coatings, surface reaction electrolytic coatings, electrolytic coatings, etc., can solve the problems of small chlorine-oxygen potential difference, poor stability, etc., to enhance the force, prolong life, inhibit the The effect of oxygen evolution

Active Publication Date: 2013-04-03
重庆铈坦新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a TiO 2 Preparation method of nanotube array supported ruthenium-containing coating catalyst

Method used

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  • Preparation method of TiO2-nanotube-array-supported ruthenium-containing coating catalyst
  • Preparation method of TiO2-nanotube-array-supported ruthenium-containing coating catalyst
  • Preparation method of TiO2-nanotube-array-supported ruthenium-containing coating catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1), TiO 2 Nanotube array preparation

[0029] First, the Ti wafer is mechanically polished to remove surface oxides, and then sonicated in acetone and ethanol for 15 minutes, and then treated with a chemical polishing solution for 30 seconds. The polishing solution is a mixed aqueous solution of concentrated nitric acid and hydrofluoric acid, and the volume ratio is HF : HNO 3 : H 2 O =1:4:5, finally rinse with ultrapure water for use; adopt a two-electrode system, with Ni plate as the counter electrode, Ti plate as the working electrode, and 0.5% hydrofluoric acid aqueous solution as the electrolyte solution. At room temperature, apply a voltage of 20 V between the working electrode and the counter electrode for 40 minutes, rinse with ultrapure water, and dry to obtain TiO 2 Nanotube array

[0030] (2) Preparation of coating solution

[0031] The coating solution was prepared with a 1:1 mixture of isopropanol and ethanol as a solvent, in which the molar concentration of rut...

Embodiment 2

[0038] Step (1) is the same as step (1) in Example 1

[0039] (2) Preparation of coating solution

[0040] The coating solution was prepared with a 1:1 mixture of isopropanol and ethanol as the solvent, in which the molar concentration of ruthenium trichloride was 0.20 mol / L; the molar concentration of n-tetrabutyl titanate was 0.22 mol / L; tetrachloride The molar concentration of tin is 0.20 mol / L; the molar concentration of antimony trichloride is 0.04 mol / L;

[0041] (3) Preparation of catalytic electrode containing ruthenium coating

[0042] TiO per square centimeter 2 Nanotube array 0.05 ml, take the coating solution prepared in step (2), and coat the TiO prepared in step (1) in 20 times 2 On the nanotube array, from the 1st to the 19th, after each coating, they were dried under an infrared lamp, and then transferred to a muffle furnace for thermal oxidation at 500°C for 10 minutes. Keep the temperature at ℃ for 1 hour, and then cool to room temperature with the furnace temperatu...

Embodiment 3

[0047] Step (1) is the same as step (1) in Example 1

[0048] (2) Preparation of coating solution

[0049] The coating solution was prepared with a 1:1 mixture of isopropanol and ethanol as the solvent, in which the molar concentration of ruthenium trichloride was 0.10 mol / L, the molar concentration of tin tetrachloride was 0.20 mol / L, trichloride The molar concentration of antimony is 0.03 mol / L;

[0050] (3) Preparation of catalytic electrode containing ruthenium coating

[0051] TiO per square centimeter 2 Nanotube array 0.2ml, take the coating solution prepared in step (2), and coat the TiO prepared in step (1) in 10 times 2 On the nanotube array, from the first to the ninth time, after each coating, they are dried under an infrared lamp, and then transferred to a muffle furnace for thermal oxidation at 400°C for 15 minutes. Keep the temperature at ℃ for 2 hours, and cool to room temperature with the furnace temperature to prepare the ruthenium-containing coating catalyst.

[0052...

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Abstract

The invention provides a preparation method of a TiO2-nanotube-array-supported ruthenium-containing coating catalyst, belonging to the technical field of chlor-alkali industry. An anodic oxidation process is utilized to form an ordered TiO2 nanotube array on a Ti substrate, thereby increasing the specific area of the supporter, reducing the transmission path of charges in the electrode material, enhancing the catalytic property of the anode coating and lowering the chlorine-oxygen potential difference; and a sintering process is utilized to dope titanium tin stibium oxide with similar ionic radius to RuO2 into a RuO2 coating, and the strong interaction between the ruthenium titanium tin stibium solid solution oxide and the substrate is utilized to enhance the stability of the electrode. The method provided by the invention is simple and easy to implement, and has the advantages of high operational safety and low production cost; and the prepared anode coating catalyst has higher electrocatalytic activity for inhibiting oxygen evolution and accelerating chlorine evolution reaction, and can be widely used in the fields of chlor-alkali industry.

Description

technical field [0001] The invention belongs to the technical field of chlor-alkali industry, in particular to a TiO 2 The preparation method of nanotube array supporting ruthenium coating catalyst. Background technique [0002] Chlor-alkali industry is an important basic chemical industry, involving various fields of national economy and people's life, its products NaOH, Cl 2 and H 2 All are important chemical production raw materials, which can be further processed into a variety of chemical products. The shape-stable anode of DSA widely used in industry is to coat RuO on the titanium plate. 2 The ruthenium-titanium oxide with content >30at.% has disadvantages such as small chlorine and oxygen evolution potential difference, poor stability at high current density, expensive electrode and low chlorine production efficiency. In addition, when the electrode is used for a certain period of time, due to the RuO 2 The active sites on the surface of the coating are occupi...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/34C25D11/26
Inventor 魏子栋熊昆陈四国夏美荣李莉张莉丁炜高媛李容
Owner 重庆铈坦新材料技术研究院有限公司
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