KR102301857B1 - Method and electrode for hypochlorite production - Google Patents

Abstract

The present invention relates to an electrode for the production of hypochlorous acid comprising a titanium support, a layer comprising iridium and tantalum, and a layer comprising tin and antimony. In addition, the present invention prepares a titanium support by anodizing a titanium substrate, forming a layer containing iridium and tantalum on the surface of the titanium support by a dip coating method, and tin and It relates to a method of manufacturing an electrode for the production of hypochlorous acid comprising the step of electrodepositing a layer comprising antimony.

Description

Electrode for the production of hypochlorous acid and its manufacturing method

The present invention relates to a method for manufacturing a metal-metal oxide composite electrode for high-efficiency hypochlorous acid production and an electrode manufactured by the method.

Hypochlorous acid is used as a cleaning, bleaching, and disinfecting agent in households, power generation, agri-food, chemical industry, semiconductors, medicine, and other industries. Global hypochlorous acid production is on the rise, with a market value of $1483 million. In the case of water treatment, when treating a solution containing chlorine ions in the solution, such as seawater, dye wastewater, or circulating cooling water, not only electrochemical pollutant decomposition, but also hypochlorous acid production and decomposition of pollutants resulting from it are simultaneously possible, so that chemical reagents and operation are possible. You can save the necessary cost.

Hypochlorous acid is mainly produced through electrochemical oxidation of chlorine ions, and DSA (Dimensional stable anodes) with high activity and stable activity is mainly used as an electrode for generating hypochlorous acid. The DSA electrode uses a noble metal-based catalyst such as Ir, Ru, or Pt. The existing DSA electrode for chlorine oxidation catalysis shows good activity in chlorine oxidation, but has problems such as high cost due to the use of a noble metal catalyst, reduced durability due to metal ion elution, and low energy efficiency. Therefore, it is essential to develop an electrocatalyst to solve these problems, and economical hypochlorous acid production will be possible after development.

The present invention prepared a non-noble metal-based electrode using a nano-sized porous titanium support in order to solve the problem of the electrode used in the conventional hypochlorous acid production system, and has a higher catalytic efficiency than an electrode using a conventional noble metal and chlorine It can be used in various fields of oxidation reaction.

It is an object of the present invention to provide an electrode for high-efficiency hypochlorous acid production by forming a first layer containing iridium and tantalum and a second layer containing tin and antimony on the surface of a titanium support and a method for manufacturing the same .

The electrode for the production of hypochlorous acid of the present invention includes a titanium support, a first layer including iridium (Ir) and tantalum (Ta) formed on the surface of the titanium support, and tin (Sn) formed on the surface of the first layer and a second layer containing antimony (Sb).

The titanium support is characterized in that any one of Ti, Ti oxide, and Ti alloy.

The titanium support selected from the above group is characterized in that it has a porous structure.

The porous structure is characterized in that it is a nanotube structure.

The porous structure is characterized in that it is formed by anodization.

The first layer is _{formed of IrTaO x} , wherein x is characterized in that it has a range of 4 to 5 .

The second layer is characterized in that it is formed _{of Sb-SnO 2 .}

The method for manufacturing an electrode for hypochlorous acid production according to the present invention comprises the steps of preparing a titanium support, forming a first layer containing iridium and tantalum on the surface of the titanium support, and tin on the surface of the first layer and forming a second layer containing antimony.

The titanium support is characterized in that it is prepared by anodizing a titanium substrate as a working electrode.

The anodization is characterized in that any one of platinum, gold, silver, SUS, and graphene is used as a counter electrode.

In the forming of the first layer, H ₂ IrCl ₆ , TaCl ₅ and the titanium support are immersed in a mixed solution containing alcohol and dip-coated to form.

The alcohol is characterized in that it comprises at least one of ethanol and IPA.

The forming of the second layer may include a first process of electrodepositing antimony on the first layer and a second process of electrodepositing tin on the electrodeposited antimony.

The first process is characterized in that antimony is electrodeposited in a solution containing _{SbCl 3} and ethylene glycol using the titanium support on which the first layer is formed as a negative electrode.

The second step is characterized in that the tin oxide is electrodeposited in a solution containing _{SnCl 4} ·H ₂ O and ethylene glycol using the titanium support on which antimony is formed in the first step as a negative electrode.

When the titanium support has a nanotube shape in the method for manufacturing an electrode for the production of hypochlorous acid, the first layer and the second layer are formed so that the nanotube shape is maintained.

The hypochlorous acid production electrode according to the present invention improves the electrochemical activity by supporting more catalysts because the titanium support having a nanotube structure made through an anodization method has a large surface area. By using IrTaO _x as an interlayer, the electrical conductivity of the electrode was improved to increase the current efficiency, and non-noble metal-based tin oxide having a higher oxygen evolution potential than the existing noble metal catalyst was used. Therefore, it shows superior efficiency in the production of hypochlorous acid than the existing noble metal electrodes. In addition, since it uses much less precious metal than the existing DAS electrode, it is possible to reduce the production cost of hypochlorous acid.

1 is a schematic diagram of an electrode manufactured according to an embodiment of the present invention.
2 is a flowchart illustrating a manufacturing method according to the present invention.
3 is an XRD analysis result after forming a second layer by the manufacturing method according to the present invention.
4 shows a process of manufacturing an electrode according to an embodiment of the present invention.
5 is an FE-SEM image comparing the electrode manufactured according to the embodiment of the present invention and the electrode under different conditions.
6 is a graph comparing the electrode activity of the electrode manufactured according to the embodiment of the present invention and the electrode under different conditions.
7 is a graph comparing the main element content of the electrode manufactured according to the embodiment of the present invention and the electrode under different conditions.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terminology used in the present application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, step, operation, component, part, or combination thereof described in the specification is present, and includes one or more other features or steps. , it should be understood that it does not preclude the possibility of the existence or addition of , operation, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

1 is an electrode for the production of hypochlorous acid prepared according to an embodiment of the present invention. The electrode of FIG. 1 includes a titanium support 102 , a first layer 103 including iridium (Ir) and tantalum (Ta), and a second layer 104 including tin (Sn) and antimony (Sb). ) may be an electrode for the production of hypochlorous acid containing.

The titanium support 102 may serve to support the first layer 103 and the second layer 104 . The titanium support 102 may be formed as a plate, and in this case, it may be formed without distinction from the titanium substrate 101 .

Also preferably, the titanium support 102 may be formed in a porous structure. When the titanium support 102 is formed in a porous structure, it may be formed in a form having a porous structure on the titanium substrate 101 . When it is formed porous, it may have a large surface area, and the surface area of the first layer 103 and the second layer 104 formed along the surface of the titanium support 102 also increases to increase the hypochlorous acid production of the present invention. It is possible to make the electrode for high efficiency. The porous structure may be formed by anodizing the titanium substrate. In addition, the porous structure may be formed by the titanium support 102 forming a nanotube structure.

In addition, the titanium support 102 may be a material containing titanium, such as Ti, Ti oxide, Ti alloy.

The first layer 103 including iridium and tantalum is formed on the surface of the titanium support 102 and may serve to increase the efficiency of the electrode. The first layer _{may be formed of IrTaO x} , and x may have a value of 4 to 5 .

The second layer 104 containing tin and antimony is formed on the surface of the first layer 103 and may serve as a catalyst in the production of hypochlorous acid of the present invention. The second layer may be formed of Sb-SnO _{2 .}

2 is a flowchart showing a method for manufacturing an electrode for the production of hypochlorous acid of the present invention. The manufacturing method according to FIG. 2 includes the steps of preparing a titanium support, forming a first layer containing iridium and tantalum on the surface of the titanium support, and a first containing tin and antimony on the surface of the first layer and forming a second layer.

In the step of preparing the titanium support, the titanium support may be formed by anodizing a titanium substrate. The titanium substrate may be a substrate containing titanium such as Ti, Ti oxide, or a Ti alloy. The anodic oxidation may be performed with a counter electrode using the titanium substrate as a working electrode. The counter electrode may have the form of a wire, a net, a plate, a filament, a coil, a post, or the like. In addition, the counter electrode may use a material such as platinum, gold, silver, SUS, graphene. The anodization may be performed at a CV of about 40 to 70V, preferably at about 60V. In the anodic oxidation, _{a solution of NH 4} F, purified water, and ethylene glycol may be used as the electrolyte. At this time, the electrolyte may be an ethylene glycol solution containing about 0.1 to 0.3 wt% of NH ₄ F and about 0.5 to 1.5 wt% of purified water, preferably about 0.2 _{wt% of NH 4} F, about 1 wt% of It may be an ethylene glycol solution containing purified water. In the anodization, the reaction temperature and the stirring speed may affect the current value.

The first layer including iridium and tantalum may be formed by dip-coating on the surface of the titanium support. The first layer may be coated by immersing the titanium support in a solution containing iridium and tantalum (dipping) and taking it out, then sequentially leaving it under vacuum conditions and atmospheric pressure conditions. The time left in the vacuum condition and atmospheric pressure condition may be about 5 to 15 minutes. The solution containing iridium and tantalum may be a mixture _{of H 2} IrCl ₆ , TaCl _{5 , and alcohol.} The alcohol in the mixed solution may be ethanol or IPA or a mixture of ethanol and IPA, and when ethanol and IPA are mixed, they are mixed in a volume ratio of about 2:1 to 1:2, or preferably mixed in a volume ratio of 1:1. can be The titanium support left in the vacuum condition and atmospheric pressure condition may be dried in a vacuum oven and heat-treated to obtain a titanium support having a first layer formed thereon. In the method of forming the first layer by the dip coating method, when the titanium support is formed in a nanotube shape, there may be an advantage in that even the inside of the nanotube structure is uniformly coated. In addition, compared to other methods, the surface is uniformly coated and the loss of the coating solution can be minimized. In this case, when the titanium support is formed in a nanotube shape, the tube shape may be continuously maintained during the process, and the tube shape may be maintained without being filled in the dip coating process.

The second layer including tin and antimony may be formed on the surface of the first layer by electrodeposition. In addition, the second layer may be formed through two processes.

The first process is a process of electrodepositing antimony on the surface of the first layer. An antimony layer may be formed by placing the titanium support on which the first layer is formed as a (-) electrode and _{electrodeposition in a solution containing SbCl 3 and ethylene glycol.} In the case of the antimony electrodeposition, it may proceed for about 30 seconds to 90 seconds in a range of about 15 mA/cm 2 to 25 mA/cm 2 CC.

The second process is a process of electrodepositing tin oxide on the surface of the first layer on which the antimony is formed. The titanium support on which the antimony is formed is placed at the (-) electrode, and tin oxide may be electrodeposited in a solution containing _{SnCl 4} , H _{2 O, and ethylene glycol.} When the tin oxide is electrodeposited, it may proceed for about 150 seconds to 210 seconds in a range of about 5 mA/cm 2 to 15 mA/cm 2 CC.

The two processes may be performed with the platinum wire as a (+) electrode. In the case of electrodeposition on both sides of the electrode in which the first layer is formed on the surface of the titanium support, two platinum wires may be used to place it on both sides. After the electrodeposition process, it is dried and then heat-treated to obtain a finished electrode.

The second layer is formed through two processes, but antimony and tin oxide do not form separate layers, respectively, and antimony may be doped in tin oxide. FIG. 3 is a result of XRD analysis after forming the second layer, _{and it can be confirmed that the pattern of SbO x} is not seen and thus antimony is doped in the tin oxide. Therefore, this structure may be named _{Sb-SnO 2 .}

When the electrodeposition method is used in the formation of the second layer, the amount of antimony or tin oxide of the second layer can be controlled according to the amount of flowing charge. When the titanium support has a nanotube shape, it is necessary to precisely control the amount of antimony or tin oxide in order to form the second layer without blocking the space of the tube in a situation in which the first layer is already formed. The electrodeposition method can satisfy this by controlling the amount of electrodeposition while changing the amount of charge.

When the titanium support has a nanotube shape, the first layer and the second layer may be formed to maintain the nanotube shape. Accordingly, in the process of forming the first layer and the second layer, the shape of the tube may be filled and changed to a flat plate shape or may not change to any other shape.

In the electrode manufactured by the present invention, a first layer containing iridium and tantalum is formed on the surface of a titanium support, and a second layer containing tin and antimony is sequentially formed on the surface, resulting in a second layer It may have a structure of /first layer/titanium support.

Example 1

4 is a view showing in detail a process of manufacturing an electrode for the production of hypochlorous acid according to Example 1 of the present invention.

i) preparing a titanium support (Titanium nanotube) by anodizing method

This step is a step for explaining up to the second figure in FIG. 4 . A titanium substrate (thickness 1mm, purity 99.2%, area 1x3cm 2 ) was ultrasonically washed for 10 minutes each using acetone, ethanol and distilled water. The washed titanium substrate was abraded using 400-sand paper. Again, ethanol and distilled water were ultrasonically washed for 10 minutes each. Anodization was performed at CV 60V for 45 minutes using a power supply, and a titanium substrate was used as a working electrode and a platinum wire was used as a counter electrode. As the electrolyte, an ethylene glycol solution containing 0.2 wt% NH ₄ F and 1% distilled water was used. This step was carried out at room temperature without stirring. In this way, a titanium nanotube having a diameter of 50 nm was prepared.

ii) Forming an _{IrTaO x} intermediate layer on the titanium nanotube by the dip coating method

This step is a step for explaining the third and fourth figures in FIG. 4 . The electrode prepared in step i) _{was immersed in a solution containing the IrTaO x} precursor and left at vacuum for 10 minutes and at atmospheric pressure for 10 minutes. The solution contained 70 mM H ₂ IrCl ₆ , 20 mM TaCl ₅ , and a solution in which ethanol and IPA (isopropyl alcohol) were mixed in a volume ratio of 1:1 was used. After dipping, the electrode was dried at 80°C in a vacuum oven for 10 minutes, and heat-treated at 525°C in an electric furnace at a temperature increase rate of 1°C/min for 1 hour. The electrode manufactured in this way was _{called IrTaO x} /TNT, and the electrode was still maintained in the shape of a tube.

iii) forming a _{Sb-SnO 2 layer by electrodeposition on the IrTaO x} /TNT electrode prepared above

This step is a step for explaining the last two figures in FIG. 4 . The electrodeposition step was divided into two steps. The first process is a process of electrodepositing antimony (Sb) on the electrode surface, and the second process is a process of electrodepositing tin. In this step, in the first process, _{an ethylene glycol solution containing 0.05M SbCl 3} , and in the second process, _{an ethylene glycol solution containing 1M SnCl 4} ·H ₂ O was used as an electrolyte solution. Electrodeposition was carried out using a power supply, for 1 minute at CC 20mA/cm 2 for the first process, and for 3 minutes at CC 10 mA/cm 2 for the second process. In the electrodeposition process, IrTaO _x /TNT was placed as a (-) electrode and a platinum wire as a (+) electrode. After the electrodeposition process, it was dried at room temperature, and heat-treated in an electric furnace at 500°C for 30 minutes at a temperature increase rate of 1°C/min. The prepared electrode maintained the tube shape, and the completed electrode was named Sb-SnO ₂ /IrTaO _x /TNT.

iv) Experimental results

5 is a FE-SEM (Field Emission Scanning Electron Microscope) photograph of the manufacturing step of the electrode according to Example 1; (A) is a titanium support formed in step i) has a nanotube shape of about 50 nm, it can be confirmed that it is porous. (B) is the IrTaO _x /TNT electrode formed in step ii), (C) is _{the surface of the Sb-SnO 2} /IrTaO _x /TNT electrode formed in step iii), the first layer and the second layer on the titanium support It can be seen that the tube shape is maintained even when a layer is formed. This means that the first layer and the second layer are uniformly formed along the surface of the tube of the titanium support formed of the nanotubes. (D) shows a difference from the electrode according to the present embodiment as it is formed as a simple plate rather than a porous structure as an existing commercially available DSA electrode.

Performance evaluation 1

6 is an evaluation of hypochlorous acid production efficiency by measuring the electrode activity of the electrode according to Example 1 of the present invention. The electrode according to Example 1 and the following comparative examples were compared.

[Example 2]

_{As an electrode according to Example 2 of the present invention, it is a Sb-SnO 2} /IrTaO _x /Ti electrode with a difference having a titanium plate instead of TNT as a titanium support as compared to Example 1.

[Comparative Example 1]

_{It is an Sb-SnO 2} /TNT electrode prepared in the same manner as in Example 1 by forming only a Sb-SnO ₂ layer on the surface of the TNT by electrodeposition.

[Comparative Example 2]

_{This is an IrTaO x} /TNT electrode prepared in the same manner as in Example 1 by forming only an _{IrTaO x} layer on the TNT surface by a dip coating method.

[Comparative Example 3]

_{Sb-SnO 2} +IrTaO _x /TNT electrode, which is a mixed oxide layer containing all of antimony, tin oxide, iridium, and tantalum. TNT was prepared by immersing in a solution containing Sb-SnO ₂ , IrTaO _x in order, and then heat-treating at a rate of 1°C/min starting at 500°C for 1 hour. The solution containing IrTaO _x was the same solution as that used to form the first layer in Example 1, and _{the solution containing Sb-SnO 2} was the solution used in the first process and the second process in Example 1 1 It was used by mixing 1:1.

[Comparative Example 4]

This is a DSA (Dimensionally Stable Electrode) electrode that is currently commercialized and used.

Hypochlorous acid production was produced under CC 10mA conditions by using the electrode and Comparative Examples according to Example 1 of the present invention as an anode and a platinum coil as a cathode, respectively, and using a power supply. 1M NaCl buffer electrolyte solution of pH6 was used as the electrolyte, and the pH was adjusted using a phosphate buffer _{of KH 2} PO ₄ , K ₂ HPO _{4 .} The concentration of the produced hypochlorous acid was measured for absorbance at 235 nm using a UV-Vis spectrometer.

In the hypochlorous acid production system, when voltage is applied to both electrodes under the following conditions, chlorine is generated at the anode and hydrogen is generated at the cathode. Each half-reaction can be represented by Schemes 1, 2 and 3 as follows.

[Scheme 1] 2Cl ^- → Cl ₂ + 2e ^-

[Scheme 2] Cl ₂ + H ₂ O → HOCl + H ⁺ + Cl ^-

[Scheme 3] 2H ⁺ + 2e ^- → H ₂

In the case of an oxidizing electrode producing hypochlorous acid according to an embodiment of the present invention, it is involved in the above [Scheme 1]. On the other hand, at the anode, chlorine oxidation and water oxidation reaction occur at the same time, and chlorine and oxygen can be produced at the same time. The oxidation potential of chlorine ion (2Cl ^- → Cl ₂ + 2e ^- , E°=1.36V vs.NHE) is the oxidation potential of water (oxygenation potential, OEP, 2H ₂ O → O ₂ + 4H ^- + 4e ^- , E° =1.23V vs.NHE), so it competes with the water oxidation reaction. However, since four electrons are involved for oxygen generation in water decomposition, there is a high possibility that chlorine is generated thermodynamically, and the electrode according to an embodiment of the present invention provides a catalyst that can selectively generate chlorine in a competitive reaction. It is possible to increase the production efficiency of hypochlorous acid.

The results are shown in FIG. 6 . As shown in FIG. 6 , the hypochlorous acid production efficiency _{of Sb-SnO 2} /IrTaO _{x /TNT prepared according to Example 1 was the highest.} This is about 40% higher efficiency than the conventionally commercialized DSA electrode, and the highest efficiency compared to Example 2 and other comparative examples.

The fact that Sb-SnO ₂ /IrTaO _{x /TNT has higher efficiency than the Sb-SnO 2} /IrTaO _x /Ti electrode and the DSA electrode using a simple titanium plate instead of a porous support is due to the porous structure of TNT. . In addition, it can be seen that Sb-SnO ₂ /IrTaO _x /TNT has a much better efficiency than an electrode formed without stacking, such as _{Sb-SnO 2} or IrTaO _x , or Sb-SnO ₂ +IrTaO _{x formed on the TNT.} -SnO ₂ /IrTaO _{x This} means that it is due to the stacked structure. In the electrode according to the present invention, IrTaO _x serves to increase the electrode efficiency, but the efficiency is further improved when _{forming a stacked structure with Sb-SnO 2 .} The improvement of electrode efficiency due to the stacked structure _{can also be confirmed by comparing Sb-SnO 2} /IrTaO _x /Ti and DSA with Sb-SnO ₂ /IrTaO _x /Ti having excellent efficiency.

In conclusion, the stacked structure of Sb-SnO ₂ /IrTaO _x increases the production efficiency of hypochlorous acid, and furthermore, when the support is porous, the production efficiency is further increased.

Performance evaluation 2

In order to compare the hypochlorous acid production efficiency of the electrode for hypochlorous acid production according to an embodiment of the present invention with other electrodes, an onset potential was measured.

Sb-SnO ₂ /IrTaO _x /TNT is an electrode prepared according to Example 1, and Sb-SnO ₂ /IrTaO _x /Ti is a titanium plate prepared according to another embodiment of the present invention and not as porous as in Example 1. It is an electrode with a difference using as a support, and DSA is a commercially available electrode.

The greater the difference between the chlorine evolution potential (CEP) and the oxygen evolution potential (OEP), the greater the efficiency of hypochlorous acid.

As can be seen in the table below, it can be seen that _{the starting electrode of the Sb-SnO 2} /IrTaO _x /TNT prepared according to Example 1 is the highest, and the difference between the main electrode and the Sb-SnO ₂ /IrTaO _{x /Ti} is due to the porosity of the TNT. In addition, it can be seen that the Sb-SnO ₂ /IrTaO _x /Ti electrode has a very high starting electrode than DSA, which is a commercially available electrode using the same simple titanium plate, which is due to the stacked structure of _{Sb-SnO 2} /IrTaO _x. it means. _{For this reason, it can be seen that the structure of Sb-SnO 2} /IrTaO _{x on} the surface of the titanium support according to the present invention has excellent electrode activity, and furthermore, when the titanium support is porous, it has better electrode activity.

Chlorine evolution potential (CEP) Oxygen evolution potential (OEP) OEP-CEP Sb-SnO ₂ /IrTaO _x /TNT 1.96V 2.37V 0.41V Sb-SnO ₂ /IrTaO _x /Ti 1.92V 2.10V 0.18V DSA 1.77V 1.70V -0.07V

component analysis

7 is a result of dissolving an electrode under various conditions, including the electrode according to an embodiment of the present invention, in an acid solution and analyzing the electrode components using inductively coupled plasma (ICP). 0.486 ppb of Ir was detected _{in Sb-SnO 2} /IrTaO _x /TNT prepared according to an embodiment of the present invention, and a smaller amount was detected in _{Sb-SnO 2} /IrTaO _{x /Ti.} On the other hand, in the case of the existing commercially available DSA electrode, 6.166 ppb was detected, indicating that only 7.8% of the amount of Ir used in DSA was used in _{Sb-SnO 2} /IrTaO _{x /TNT.} Although Ir shows good activity in chlorine oxidation, it has problems such as high cost, reduced durability due to metal ion elution, and low energy efficiency. Combining the performance evaluation contents with the results of FIG. 7 , the electrode according to an embodiment of the present invention uses a very small amount of iridium compared to commercial products, thereby reducing costs and producing hypochlorous acid with higher efficiency.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. You will understand that you can.

Claims (16)

In the electrode for hypochlorous acid production,
a titanium support having a nanotube shape;
_{a first layer made of IrTaO x} (x is 4 to 5) formed on the surface of the titanium support; and
Including; a second layer made of _{Sb-SnO 2} formed on the surface of the first layer;
The first layer is formed by a dip-coating method, and the second layer is formed by an electrodeposition method,
The first layer and the second layer are characterized in that formed so as to maintain the nanotube shape,
Electrode for the production of hypochlorous acid having a nanotube shape. According to claim 1,
The titanium support is characterized in that any one of Ti, Ti oxide, Ti alloy,
Electrode for the production of hypochlorous acid having a nanotube shape. delete delete According to claim 1,
The nanotube shape of the titanium support is characterized in that it is formed by anodization,
Electrode for the production of hypochlorous acid having a nanotube shape. delete delete Preparing a titanium support having a nanotube shape;
_{forming a first layer made of IrTaO x} (x is 4 to 5) on the surface of the titanium support by a dip coating method; and
Including; forming a second layer made _{of Sb-SnO 2} on the surface of the first layer by an electrodeposition method;
The first layer and the second layer are characterized in that formed so as to maintain the nanotube shape,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. 9. The method of claim 8,
The titanium support having the nanotube shape is characterized in that it is prepared by anodizing a titanium substrate as a working electrode,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. 10. The method of claim 9,
The anodization is characterized in that any one of platinum, gold, silver, SUS, and graphene is used as a counter electrode,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. 11. The method of claim 10,
Forming the first layer comprises:
H ₂ IrCl ₆ , TaCl ₅ and characterized in that formed by dip coating the titanium support in a mixed solution containing alcohol,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. 12. The method of claim 11,
The alcohol is characterized in that it comprises at least one of ethanol or IPA,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. 12. The method of claim 11,
Forming the second layer comprises:
a first process of electrodepositing antimony on the first layer; and
A second step of electrodepositing tin on the electrodeposited antimony; characterized in that it comprises,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. 14. The method of claim 13,
The first process is
Characterized in that antimony is electrodeposited in a solution containing _{SbCl 3} and ethylene glycol by using the titanium support on which the first layer is formed as a (-) electrode,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. 15. The method of claim 14,
The second process is
Characterized in that the tin oxide is electrodeposited in a solution containing _{SnCl 4} ·H ₂ O and ethylene glycol by using the titanium support on which antimony is formed in the first step as a (-) electrode,
A method of manufacturing an electrode for the production of hypochlorous acid having a nanotube shape. delete

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