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Ruthenium-iridium titanium-based metal oxide electrode material based on core-shell structure, preparation method and application thereof

A technology of noble metal oxides and core-shell structure, applied in the field of electrochemistry, can solve the problems of high cost, unfavorable large-scale application, low chlorine evolution potential, etc., achieve efficiency improvement, avoid selective dissolution and shedding, and improve stability Effect

Active Publication Date: 2020-06-16
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

The Chinese patent with the publication number CN104005047B invented a new type of mixed metal oxide electrode for electrolysis of low-temperature seawater antifouling, including electrode substrate and PtOx-SnO 2 -Co 3 o 4 Multi-component mixed noble metal oxide coating, the electrode has better chlorine evolution current efficiency and lower chlorine evolution potential under low temperature seawater conditions, which enhances the chlorine evolution and oxygen evolution reaction selectivity of the electrode, and prolongs the service life. The Pt content in the coating composition is more than 50%, the cost is high, and it is not conducive to large-scale application

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  • Ruthenium-iridium titanium-based metal oxide electrode material based on core-shell structure, preparation method and application thereof
  • Ruthenium-iridium titanium-based metal oxide electrode material based on core-shell structure, preparation method and application thereof

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preparation example Construction

[0033] A kind of ruthenium iridium series titanium-based metal oxide electrode material based on core-shell structure of the present invention, its preparation method comprises the following steps:

[0034] 1. Pretreatment of the substrate

[0035] Sandblasting, degreasing and oxalic acid etching are performed on the surface of the substrate to obtain a uniform rough surface for later use, specifically:

[0036] 1.1) Sand blast the surface of the substrate first, then rinse with distilled water to remove residual sand and metal chips on the surface of the substrate;

[0037] 1.2) Put the rinsed substrate into acetone for degreasing;

[0038] 1.3) Finally, put the degreased substrate into the oxalic acid solution, perform surface etching in a boiling state, and then clean to obtain a uniform rough surface;

[0039] 1.4) Dry the substrate treated in step 1.3) and put it in absolute ethanol for later use.

[0040] 2. Preparation of electrode coating solution

[0041] The elec...

Embodiment 1

[0052] A method for preparing a ruthenium-iridium series titanium-based metal oxide electrode material based on a core-shell structure of the present invention comprises the following steps:

[0053] 1. Substrate pretreatment

[0054] 1.1) Use a TA2 industrial pure titanium plate with a plate shape of 140mm×110mm×3mm as the electrode substrate, first use corundum with a particle size of 120 μm to sandblast the surface of the substrate, and then rinse with distilled water to remove residual sand particles and metal chips on the surface of the substrate;

[0055] 1.2) Put the rinsed substrate into acetone for degreasing;

[0056] 1.3) Finally, put the degreased substrate into a 10% (mass fraction) oxalic acid solution, keep it in a boiling state for 2 hours for surface etching, and after taking it out, use ultrasonic cleaning in deionized water for 10 minutes to obtain a uniform rough surface;

[0057] 1.4) Dry the substrate treated in step 1.3) and put it in absolute ethanol f...

Embodiment 2

[0069] 1. Substrate pretreatment: the electrode substrate is made of reticular titanium material with a size of 100mm×100mm×3mm, and the same method as in Example 1 is used to perform sandblasting, degreasing and oxalic acid etching in sequence to obtain a pretreated titanium substrate for use .

[0070] 2. Preparation of electrode coating solution

[0071] 2.1) RuO 2 Preparation of nanoparticles: same as Example 1.

[0072] 2.2) IrO 2 @RuO 2 Preparation of particles: 0.18g RuO 2 Grind for 20min, put it into 20mL of absolute ethanol for ultrasonic dispersion for 2 hours, mix H 2 IrCl 6 ·6H 2 O was added to the above solution, and then the molar concentration of metal ions in the solution was adjusted to 0.3mol / L by adding n-butanol, the volume of the coating solution was 50mL, ammonia water was added dropwise to the solution under magnetic stirring, and the pH value was kept at 12. The mixture was stirred for 2 hours to obtain a coating liquid.

[0073] 3. Electrode p...

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Abstract

The invention provides a ruthenium-iridium titanium-based metal oxide electrode material based on a core-shell structure, a preparation method and application thereof, and belongs to the technical field of electrochemistry. According to the invention, the novel electrode material has a core-shell structure, wherein the iridium oxide active component coats the ruthenium oxide active component through chemical bond acting force to form a nano-scale ordered assembly framework, so that the stability of iridium oxide and the catalytic activity of ruthenium oxide are adjusted to achieve advantage complementation, the defect that the ruthenium active component in the traditional anode coating is selectively dissolved and fall off is overcome, the stability of the electrode under the low-temperature condition is remarkably improved, and the service life is greatly prolonged; and the electrode structure has more electrochemical active sites and large electrochemical active surface area, has improved chlorine evolution current efficiency under the low-temperature condition, and is particularly suitable for seawater electrolysis pollution prevention, electrolysis production of sodium hypochlorite, ship ballast water treatment and the like under the low-temperature seawater chlorine evolution environment.

Description

technical field [0001] The invention relates to a ruthenium-iridium-based titanium-based metal oxide electrode material based on a core-shell structure. The electrode can be used for electrolytic seawater anti-sea biofouling devices, ship ballast water treatment devices, and sodium hypochlorite electrolysis production devices. technology field. Background technique [0002] The electrolytic seawater antifouling technology is to use the chlorine-analysis active anode to electrolyze seawater to produce available chlorine, which can stun or kill marine organisms and their spores and larvae, so as to prevent the growth, reproduction and attachment of marine organisms. Electrolytic seawater antifouling technology has the advantages of safety and reliability, convenient management, good antifouling effect, no pollution to the environment, and relatively economical. It is widely used in seawater pipeline antifouling systems of coastal power plants, ship ballast water treatment syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/26
CPCC25B1/26C25B11/051C25B11/057C25B11/091
Inventor 辛永磊高显泽段体岗许立坤
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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