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Nanocrystal metal oxide composite electrode and method for preparing same

A composite electrode and oxide technology, which is applied in the field of electrochemistry, can solve the problems affecting the performance of oxide anodes, the actual composition is difficult to control, and the grain size is large, so as to achieve good matching and synergy, improve reaction selectivity, and excellent The effect of overall performance

Active Publication Date: 2009-09-16
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxide electrode prepared by this precursor coating solution has disadvantages such as uneven composition, difficult control of the actual composition (often inconsistent with the nominal composition), large grain size, etc., which ultimately affects the performance of the prepared oxide anode

Method used

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  • Nanocrystal metal oxide composite electrode and method for preparing same
  • Nanocrystal metal oxide composite electrode and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: One of the preparation schemes of nanocrystalline metal oxide composite electrodes.

[0013] (1) Matrix pretreatment: The TA2 industrial pure titanium plate test piece with a mass percentage of more than 99% with a size of 200mm × 100mm × 1.5mm is used as the electrode matrix, and the surface of the sandblasted titanium plate test piece is rinsed with water. , and etched in oxalic acid solution with a temperature of 90° C. and a concentration of 10% by weight for 2 hours to obtain a uniform rough surface, and immersed the test piece in ethanol for use. (2), preparation of intermediate layer: first mix citric acid and ethylene glycol, and the molar ratio of the two is 1:5; then chloroiridic acid, tantalum pentachloride and stannous chloride are molar ratio Ir:Ta : Sn is (55 ~ 70): (10 ~ 30): (0 ~ 25) (see Table 1 for details, forming 4 kinds of products with different proportions), add it to the mixed solution of citric acid and ethylene glycol, adjust the sol...

Embodiment 2

[0015] Example 2: The second preparation scheme of the nanocrystalline metal oxide composite electrode.

[0016] (1) The size of the substrate sample and the pretreatment method are the same as those in Example 1. (2), the preparation of the intermediate layer: first mix citric acid and ethylene glycol, and the molar ratio of the two is 1:5; The molar ratio of 63:27:10 was added to the mixed solution of citric acid and ethylene glycol, and the solvent was adjusted so that the molar concentration of the metal in the solution was 0.35mol / L; stirred at 60 °C for 8 hours, and then left for 3 hours to obtain a mixture containing Colloidal solution A mixed with metal ions; colloidal solution A was painted on the pretreated titanium substrate test piece, dried with an infrared lamp, and then thermally oxidized at 500 ° C for 15 minutes, repeating the above process of painting, drying, and thermal oxidation. The iridium content of the intermediate layer is 3.5g / m 2 . (3), preparati...

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Abstract

The invention relates to a nanocrystal metal oxide composite electrode and a method for preparing the same. The electrode is suitable for a seawater electrolysis device for preventing the contamination of sea creature and used for electrolytic production of sodium hypochlorite, cathode protection and other electrochemical engineering; a main structure of the electrode comprises a substrate, an anticorrosive antipassivated middle layer and a surface activity layer, wherein the substrate is metal titanium; the purity of the metal titanium is over 99 percent; the middle layer is iridium-tantalum or iridium-tantalum-tin oxide; the surface activity layer is ruthenium-iridium-tin metal oxide; a process for preparing the electrode adopts a sol-gel method and comprises three process steps of the pretreatment of the substrate, the preparation of the anticorrosive antipassivated middle layer and the preparation of the surface activity layer; and the electrode has the characteristics of even compositions, difficulty for burning loss, fine crystal grains, simple preparation process, controllable process and the like.

Description

Technical field: [0001] The invention relates to a nanocrystalline metal oxide composite electrode and a preparation method thereof. The electrode is suitable for an electrolysis seawater anti-sea biological fouling device, and can also be used in electrochemical engineering such as sodium hypochlorite electrolysis production and cathodic protection, and belongs to the technical field of electrochemistry. Background technique: [0002] At present, marine ships, oil platforms, coastal power plants and chemical plants usually use seawater as cooling water. Marine biological fouling is a key problem affecting the normal operation of seawater cooling systems. The adhesion of marine organisms will not only cause pipeline blockage, insufficient cooling water, reduced cooling efficiency, failure of rotating equipment, etc., but also cause accelerated corrosion of certain metal materials. Electrolytic seawater antifouling technology is an effective method to solve marine biological ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B1/26
Inventor 许立坤王均涛辛永磊唐益
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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