KR20210121605A - Oxide coated carbon nanotube support via surfactant and Manufacturing method of the Same - Google Patents

Abstract

The present invention relates to a carbon nanotube support in which the coating amount of an oxide is controlled using a surfactant, and a method for manufacturing the same, and more specifically, to a support that exhibits excellent conductivity and stability by controlling the content of tin oxide nanoparticles on carbon nanotubes surface-modified with a surfactant, and a method for manufacturing the same. The support and a supported catalyst using the same according to the present invention can be applied to a cation-exchange electrolyte membrane water electrolysis battery, a cation-exchange electrolyte membrane fuel cell, a lithium-air battery, and the like.

Description

A carbon nanotube support with an oxide coating amount controlled using a surfactant and a method for manufacturing the same

The present invention relates to a carbon nanotube support in which the coating amount of oxide is controlled using a surfactant and a method for preparing the same, and more particularly, to control the content of tin oxide nanoparticles on carbon nanotubes surface-modified with a surfactant to a carrier exhibiting excellent conductivity and stability and a method for manufacturing the same.

In various energy conversion and storage systems, such as next-generation lithium-air batteries, cation-exchange membrane fuel cells, and anion-exchange membrane fuel cells, electrochemical catalysts are an important factor in determining the efficiency of reactions. In the case of technologies such as polymer electrolyte membrane fuel cells and polymer electrolyte membrane water electrolysis, platinum and iridium are used in excess in oxygen electrodes, respectively, so it is important to reduce the amount of the noble metals used.

In this case, when the carrier is used, the dispersion degree of the noble metal catalyst such as platinum and iridium can be improved, so that the utilization efficiency of the noble metal catalyst can be increased. In particular, in the case of polymer electrolyte water electrolysis technology, oxygen evolution reaction (OER) occurs at the oxygen electrode, and the carriers used for the oxygen electrode in a high voltage acidic environment must have excellent stability and high electrical conductivity.

Examples of materials that are stable in a high-voltage acidic environment include titanium dioxide and tin oxide. When these oxide-based materials are introduced as a support, they can play a role in increasing the dispersion of noble metals. However, in the case of an oxide-based support, since the movement of electrons is hindered due to low conductivity, the performance of the entire catalyst is rather deteriorated.

Dopants are introduced to increase the conductivity of the support, and in the case of tin oxide, antimony, fluorine, indium, and the like are typically used. However, in the case of antimony, fluorine, and indium, there is a problem of eluting in a high voltage acidic environment, so that the conductivity of the carrier is lowered and thus the performance is reduced.

Therefore, there is a demand for the development of an oxide-based support having excellent conductivity while being stable in a high voltage acidic environment.

Korean Patent Registration No. 10-1484193 Korean Patent Registration No. 10-1250587

An object of the present invention is to provide a support exhibiting excellent conductivity and stability, and coating oxide particles on a carbon-based support without a dopant to maximize the activity and durability of the support and to provide a supported catalyst. .

On the one hand, the present invention

In the catalyst carrier for oxygen evolution reaction,

a carbon nanotube whose surface is partially oxidized through acid treatment to form an oxide adsorption point; and

Including; oxide nanoparticles coated on the oxide adsorption point;

By surface-modifying the oxide adsorption point with sodium lauryl sulfate, the area where the oxide nanoparticles can be coated is expanded to control the coating amount of the oxide nanoparticles, the coating amount of the oxide is controlled using a surfactant A carbon nanotube carrier is provided.

On the other hand, the present invention

In the method for producing a catalyst support for oxygen evolution reaction,

(i) generating an oxide adsorption point region by oxidizing a portion of the surface of the carbon nanotubes through acid treatment;

(ii) reforming the carbon nanotube with sodium lauryl sulfate to expand the oxide adsorption point region; and

(iii) coating the oxide nanoparticles on the oxide adsorption point region; provides a method for producing a carbon nanotube support in which the coating amount of the oxide is controlled by using a surfactant, characterized in that it comprises.

On the other hand, the present invention

To provide a supported catalyst for oxygen evolution reaction, in which iridium or platinum particles are supported on the carbon nanotube support.

The support according to the present invention exhibits excellent activity and durability compared to the conventional carbon support or oxide support because it has high electrical conductivity and excellent stability in an acidic environment by selectively coating tin oxide nanoparticles on carbon nanotubes. can

In addition, since the support according to the present invention shows superior performance and durability than a commercial iridium catalyst or an iridium catalyst supported on a commercial carbon support for oxygen evolution reaction in an acidic environment, a cation-exchange electrolyte membrane water electrolysis battery as well as a cation - It can be applied as a material that effectively reduces the amount of iridium used in exchange electrolyte membrane fuel cells, lithium-air batteries, etc.

In addition, since a solution-based method is used without a separate vacuum equipment for coating the tin oxide nanoparticles, it can be applied to control the coating amount of other oxide nanoparticles.

1 is a transmission electron microscope (TEM) analysis result of the acid-treated carbon nanotube of Example 1 according to the present invention.
2 is a scanning electron microscope (SEM) analysis result of the acid-treated carbon nanotube of Example 1 according to the present invention.
3 is a schematic diagram illustrating a process of coating tin oxide on carbon nanotubes according to an embodiment of the present invention.
4 is a scanning electron microscope (SEM) analysis result of the carrier of Example 3 according to the present invention.
5 is a transmission electron microscope (TEM) analysis result of the carriers of Examples 2, 3 and 4 according to the present invention.
6 is a scanning transmission electron microscope (STEM) analysis result of the supported catalyst of Example 2-1 according to the present invention.
7 is a scanning transmission electron microscope (STEM) analysis result of the supported catalyst of Example 3-1 according to the present invention.
8 is a scanning transmission electron microscope (STEM) analysis result of the supported catalyst of Example 4-1 according to the present invention.
9 is a graph showing linear sweep voltammetry (LSV) polarization curves for oxygen evolution reaction in an acidic electrolyte environment of the supported catalysts of Examples and Comparative Examples according to the present invention as a voltage versus current density.
10 is a graph showing voltage versus time measured while applying a constant current in an acidic electrolyte environment of the carrier and the supported catalyst of Examples and Comparative Examples according to the present invention.
11 is a schematic diagram comparing the coating amount of tin ions on the acid-treated carbon nanotubes according to the present invention according to the presence or absence of modification of the surfactant.

Hereinafter, the present invention will be described in more detail.

One embodiment of the present invention relates to a carbon nanotube carrier in which the coating amount of the oxide is controlled using a surfactant,

In the catalyst carrier for oxygen evolution reaction,

a carbon nanotube whose surface is partially oxidized through acid treatment to form an oxide adsorption point; and

Including; oxide nanoparticles coated on the oxide adsorption point;

By surface-modifying the oxide adsorption point with sodium lauryl sulfate, the area where the oxide nanoparticles can be coated is expanded to control the coating amount of the oxide nanoparticles.

In the case of the metal oxide/carbon nanotube composite according to the present invention, the carbon nanotube (CNT) has a quasi-one-dimensional quantum structure, and various quantum phenomena are observed in a low dimension, particularly mechanical robustness, chemical stability, and thermal conductivity. Not only is this excellent, but it also exhibits a unique characteristic that takes on the properties of a conductor or a semiconductor depending on the structure.

In the case of the conventional metal oxide/carbon nanotube composite manufacturing method, it essentially includes a process of acid-treating the surface of the carbon nanotube prior to coating the metal oxide, and the surface of the CNT powder that has not been subjected to the acid treatment exhibits hydrophobicity. This is because it is difficult to disperse in a solvent. However, this acid treatment process acts as a time/economic limiting factor in terms of practical applicability, and furthermore, there is a problem of causing damage to the structure of the CNT growth state.

Accordingly, the support composed of the metal oxide/carbon nanotube composite according to the present invention minimizes the acid treatment process to prevent damage to the CNT structure, and modifies the CNT surface with a surfactant to increase the coating content of the metal oxide effect can be shown.

Referring to FIG. 11, by surface-modifying the carbon nanotube with an oxide adsorption point formed by oxidizing a part of the surface through acid treatment with sodium dodecyl sulfate (SDS), a metal oxide is also coated on the surface of the carbon nanotube that is not acid-treated can do it Through this, the content of the metal oxide coated with the carbon nanotubes can be controlled.

Sodium lauryl sulfate is one of the surfactants having a hydrophilic portion and a hydrophobic portion. When the sodium lauryl sulfate is dissolved in deionized water, it is dissociated into C ₁₂ H ₂₅ SO ₄ ⁻ and Na ₊ , where the carbon chain part, which is a hydrophobic part, is adsorbed to the surface of the carbon nanotube, and the hydrophilic part -SO ₄ ⁻ on the outside is are exposed These -SO ₄ ^- moieties become sites to which metal ions such as tin ions can be easily adsorbed. Accordingly, the amount of adsorption of metal ions may increase and the amount of coating of metal oxide particles on the surface may increase.

In one embodiment of the present invention, the metal oxide may be used, such as tin oxide, titanium dioxide, molybdenum oxide, but is not limited thereto.

The size of the metal oxide particles is preferably 5 to 10 nm.

Another feature of the metal oxide particles is that they are not only formed in a small size, but are also highly dispersed and adsorbed on the surface of the carbon nanotube.

In one embodiment of the present invention, the content ratio of the carbon nanotubes and sodium lauryl sulfate is preferably 1:2 to 1:10, more preferably 1:2.

When the content ratio is less than the above range, the modification effect of the surfactant is insignificant and the coating amount of the metal oxide such as tin oxide cannot be increased. .

The content ratio is based on wt%.

Since the carbon nanotube support according to the present invention can be modified with sodium lauryl sulfate to increase the content of metal oxides, it can exhibit excellent electrical conductivity and excellent catalytic performance by increasing the dispersion of noble metals.

One embodiment of the present invention relates to a method for manufacturing a carbon nanotube carrier in which the coating amount of an oxide is controlled using a surfactant,

In the method for producing a catalyst support for oxygen evolution reaction,

(i) generating an oxide adsorption point region by oxidizing a portion of the surface of the carbon nanotubes through acid treatment;

(ii) reforming the carbon nanotube with sodium lauryl sulfate to expand the oxide adsorption point region; and

(iii) coating the oxide nanoparticles on the oxide adsorption point region; characterized in that it comprises a.

In the present invention, the entire process can be roughly divided into three steps.

The first step is to create an adsorption point for tin ions when coating tin oxide nanoparticles. The carbon nanotube surface is oxidized by dispersing the carbon nanotube in an acid solution in which the volume ratio of sulfuric acid and nitric acid is mixed in a 3:1 ratio. In this process, the oxidized surface serves as an adsorption point where tin ions are adsorbed. When the reaction is complete, deionized water is added to neutralize the acid solution, and then sulfuric acid and nitric acid are removed using a filtration device. Thereafter, the carbon nanotubes subjected to acid treatment are obtained through a drying process.

In the second step, the surface-modification of the prepared acid-treated carbon nanotubes with sodium lauryl sulfate to expand the adsorption point region is as follows. Sodium dodecyl sulfate (SDS) and hydrochloric acid are added to water and stirred at room temperature to mix. When the solution becomes transparent, the pre-treated carbon nanotubes are put, dispersed using an ultrasonic disperser, and stirred at room temperature for one hour to obtain modified carbon nanotubes.

In the third step, the process of coating the tin oxide nanoparticles on the modified carbon nanotubes is as follows. Tin chloride (Sn(II) chloride) is added to the solution in which the modified carbon nanotubes are dispersed to adsorb tin ions to the acid-treated carbon nanotubes. At this time, since the amount of tin ions adsorbed is controlled according to the ratio of the carbon nanotubes to sodium lauryl sulfate, the coating amount of the tin oxide nanoparticles can be controlled. When the reaction is completed, excess tin ions that are not adsorbed are removed through a filtration device, washed several times using deionized water, dried, and then heat-treated at 300 to 400° C. in an air atmosphere for about 2 hours to convert tin ions to tin oxide. oxidize At this time, since the tin ions are adsorbed only to the carbon nanotubes, no separate tin oxide nanoparticles are formed except for the tin oxide coated on the carbon nanotubes.

The second step and the third step may be performed simultaneously to improve process easiness, and at this time, sodium lauryl sulfate and tin chloride may be added together.

According to the manufacturing method according to the present invention, since the coating amount of metal oxide nanoparticles can be increased by oxidizing a part of the surface of the carbon nanotubes by acid treatment and then modifying them with sodium lauryl sulfate, the dispersion degree of noble metal particles such as platinum and iridium Since it can be improved, it is possible to increase the utilization efficiency of the noble metal catalyst.

One embodiment of the present invention relates to a supported catalyst for oxygen evolution reaction in which noble metal particles such as iridium and platinum are supported on the carbon nanotube support.

The supported catalyst can exhibit an excellent effect on the oxygen evolution reaction in a high voltage acidic electrolyte environment, and the activity and durability of the catalyst can be improved.

Specifically, as a method for preparing the catalyst, the carbon nanotubes coated with the tin oxide nanoparticles and potassium iridium chloride (K ₂ IrCl ₆ ) are put in ethylene glycol and dispersed therein, followed by an aqueous solution of potassium hydroxide (KOH). After adjusting the pH to 10 using a , and stirring in an argon atmosphere at 160 to 190 ℃ for about 3 hours, when the reaction is completed, it is cooled to room temperature, filtered, washed, and dried to obtain a supported catalyst.

Hereinafter, the present invention will be described in more detail by way of Examples. These examples are for illustrative purposes only, and it is apparent to those skilled in the art that the scope of the present invention is not limited to these examples.

Example 1: Preparation of acid-treated carbon nanotubes

After adding carbon nanotubes to an acid solution in which sulfuric acid and nitric acid were mixed, acid treatment was performed by stirring at room temperature for 12 hours. At this time, sulfuric acid and nitric acid were mixed in a 3:1 ratio. When the acid treatment was completed, the carbon nanotubes were washed with distilled water, filtered and dried to obtain pretreated carbon nanotubes.

FIG. 1 is a transmission electron microscope (TEM) analysis result of the acid-treated carbon nanotube of Example 1, confirming that the structure of the carbon nanotube is well maintained even after acid treatment.

FIG. 2 is a scanning electron microscope (SEM) analysis result of the acid-treated carbon nanotube of Example 1, and it was confirmed through macroscopic observation that the structure of the carbon nanotube was well maintained without collapsing even after acid treatment.

Example 1-1: Preparation of Iridium-supported Supported Catalyst

In order to support the iridium nanoparticles on the carbon nanotubes prepared in Example 1, the carbon nanotubes of Example 1 and potassium iridium chloride (K ₂ IrCl ₆ ) were put in ethylene glycol, dispersed, and then hydroxylated. The pH was adjusted to 10 using an aqueous potassium (KOH) solution, and the mixture was stirred at 170° C. for 3 hours in an argon atmosphere. Upon completion of the reaction, the reaction was cooled to room temperature, filtered, washed, and dried to prepare a carbon nanotube-supported catalyst on which 20 wt% of iridium was supported.

Example 2: Preparation of a carrier coated with tin oxide nanoparticles on acid-treated carbon nanotubes

In order to coat the tin oxide nanoparticles on the carbon nanotubes prepared in Example 1, tin (II) chloride (SnCl ₂ ) and hydrochloric acid (HCl) aqueous solution were prepared and then, when the solution became transparent, using an ultrasonic disperser Example The carbon nanotubes of No. 1 were dispersed and stirred for 1 hour. When the reaction was completed, excess tin ions not adsorbed to the carbon nanotubes were removed using a filtration device. After washing and drying several times, heat treatment was performed at 350° C. for 2 hours in an air atmosphere, and then cooled to room temperature to prepare a carbon nanotube carrier.

3 is a schematic diagram illustrating a process of coating tin oxide on the carbon nanotubes. Referring to FIG. 3 , tin oxide can be selectively coated only on the surface of carbon nanotubes by adsorbing tin ions and then washing using a filtering device to remove excess tin ions.

Example 2-1: Preparation of Iridium-supported Supported Catalyst

In order to support the iridium nanoparticles on the support prepared in Example 2, the support prepared in Example 2 and potassium iridium chloride were put in ethylene glycol and dispersed, and then the pH was adjusted to 10 using an aqueous KOH solution, The mixture was stirred at 170° C. for 3 hours in an argon atmosphere. Upon completion of the reaction, the reaction was cooled to room temperature, filtered, washed, and dried to prepare a supported catalyst on which iridium was supported.

6 shows the results of a scanning transmission electron microscope (STEM) of the supported catalyst. 6, in the case of Example 2-1, sodium lauryl sulfate was not added, so the tin oxide nanoparticles were not evenly coated on the carbon nanotubes. It was confirmed that the shape was not evenly distributed.

Example 3: Preparation of a carrier (CNT:SDS=1:2) in which the coating amount of tin oxide nanoparticles was controlled using sodium lauryl sulfate on acid-treated carbon nanotubes

In order to control the content of tin oxide nanoparticles coated on the acid-treated carbon nanotubes, a support was prepared in the same manner as in Example 2, except that sodium lauryl sulfate was added to the aqueous solution. At this time, the ratio of the acid-treated carbon nanotubes of Example 1 and sodium lauryl sulfate was 1:2.

4 shows the results of scanning electron microscope (SEM) analysis of the carrier of Example 3, it was confirmed that only the shape of the carbon nanotube was observed, so that the tin oxide nanoparticles were not separately separated.

Example 3-1: Preparation of Iridium-supported Supported Catalyst

In order to support the iridium nanoparticles on the support prepared in Example 3, the same as in Example 2-1 except for using the support prepared in Example 3 instead of the support prepared in Example 2 A supported catalyst was prepared by this method.

7 shows the results of scanning transmission electron microscopy (STEM) analysis of the supported catalyst of Example 3-1. The ratio of sodium lauryl sulfate was twice that of carbon nanotubes, and accordingly, tin oxide nanoparticles were added to carbon nanotubes. It was confirmed that the shape was evenly distributed on the top and the iridium particles were also evenly distributed.

Example 4: Preparation of a carrier (CNT:SDS=1:10) in which the coating amount of tin oxide nanoparticles was controlled using sodium lauryl sulfate on acid-treated carbon nanotubes

In order to control the content of tin oxide nanoparticles coated on the acid-treated carbon nanotubes, a support was prepared in the same manner as in Example 2, except that sodium lauryl sulfate was added to the aqueous solution. At this time, the ratio of the acid-treated carbon nanotubes of Example 1 and sodium lauryl sulfate was 1:10.

Example 4-1: Preparation of Iridium-supported Supported Catalyst

In order to support the iridium nanoparticles on the support prepared in Example 4, the same as in Example 2-1, except that the support prepared in Example 4 was used instead of the support prepared in Example 2 A supported catalyst was prepared by this method.

FIG. 8 shows the results of scanning transmission electron microscopy (STEM) analysis of the supported catalyst of Example 4-1. The ratio of sodium lauryl sulfate was added 10 times compared to the carbon nanotubes, and accordingly, the tin oxide nanoparticles were carbon nanotubes. was completely covered, and it was confirmed that the iridium nanoparticles were evenly distributed on the tin oxide nanoparticles.

5 is Transmission electron microscope (TEM) analysis results of the carriers of Examples 2, 3 and 4 are shown. Referring to FIG. 5, it was confirmed that the coating amount of tin oxide was changed according to the ratio of sodium lauryl sulfate and acid-treated carbon nanotubes. As the ratio of sodium lauryl sulfate increased, it was confirmed that the amount of tin oxide nanoparticles formed on the surface of the carbon nanotube increased.

Comparative Example 1: Commercial Iridium Catalyst

A commercial catalyst (Premetek) having an iridium content of 20 wt% was prepared and compared with the catalyst prepared in the above example.

Comparative Example 2: Preparation of a supported catalyst supporting iridium on Vulcan carbon

In order to compare the performance and durability of commercial Vulcan carbon support, commercial Vulcan carbon and potassium iridium chloride (K ₂ IrCl ₆ ) were put in ethylene glycol and dispersed, and then the pH was adjusted to 10 using KOH aqueous solution and 3 at 170 ° C. The mixture was stirred in an argon atmosphere for hours. Upon completion of the reaction, the reaction was cooled to room temperature, filtered, washed, and dried to prepare a supported catalyst in which 20 wt% of iridium was supported.

Experimental Example 1: Confirmation of generation of adsorption points for tin ions

The carbon nanotubes of Example 1 were analyzed with an element analyzer to determine whether an adsorption point capable of adsorbing tin ions was generated while acid-treated. Referring to Table 1 below, it was confirmed that carbon nanotubes were oxidized in the acid treatment process and an adsorption point capable of adsorbing tin ions was created, as the carbon content decreased and the oxygen content increased in Example 1 after acid treatment. did.

element(%) carbon nanotubes Example 1 carbon 96.4 86.7 Oxygen 0.4 6.4 nitrogen 0.06 0.15 Hydrogen 0.02 0.34

Experimental Example 2: Electrical conductivity evaluation

The electrical conductivity of commercial carbon nanotubes and the carbon nanotubes of Examples 1 and 3 was evaluated. Referring to Table 2 below, in the process of acid-treating carbon nanotubes and coating tin oxide, the conductivity decreased, but the conductivity of the carbon nanotubes of Example 3 was 0.26 S/cm, which was high enough to be used as a carrier. It was confirmed that it has conductivity.

S/cm carbon nanotubes Example 1 Example 3 conductivity 5.3 36.2 0.26

Experimental Example 3: Evaluation of half-cell activity and durability of the catalyst

Referring to FIG. 9 , the half-cell activity of the catalysts of Comparative Examples 1 and 2 and Examples 1-1, 2-1, 3-1 and 4-1 in the acidic electrolyte was evaluated. _{To evaluate the activity, the current was measured by applying a voltage of 1.2-1.8 V RHE} in the oxidation direction at a rate of 5 mV/s in an argon gas saturated electrolyte environment. In addition, the voltage was corrected by measuring the resistance by impedance spectroscopy (EIS) at _{1.51 V RHE.} The results are shown as voltage versus current density. The amount of iridium on the electrode during measurement _{was fixed at 10 μg Ir} / cm ² , but in Comparative Example 1, the density of the catalyst particles was small because it was an unsupported catalyst, and the amount of iridium was increased to _{40 μg Ir} / cm ^{2 .}

In addition, referring to FIG. 10 , the half-cell durability of the catalysts of Comparative Examples 1 and 2 and Examples 1-1, 2-1, 3-1 and 4-1 in the acidic electrolyte was evaluated. Durability evaluation was conducted in an argon gas saturated electrolyte environment, and the evaluation was performed using a constant current method. A change in voltage was measured by applying a constant current density of 10 mA/cm ^{2 .}

Table 3 is a numerical result of the activity indicators of the catalysts of Comparative Examples 1 and 2, Examples 1-1, 2-1, 3-1 and 4-1 with reference to FIGS. 9 and 10 .

activity per mass
(A/g _Ir @ 1.55 V _RHE ) Time to reach 2 V _RHE
(minute) Example 1-1 1000 205 Example 2-1 345 90 Example 3-1 938 310 Example 4-1 456 185 Comparative Example 1 244 47 Comparative Example 2 660 143

Referring to Table 3, the activity of the oxygen evolution catalyst was summarized in terms of the activity per iridium mass. Examples 1-1 and 3-1 showed higher activity than those of Comparative Examples 1 and 2. Compared to the unsupported catalyst, Comparative Example 1, the catalyst of Example 1-1 showed an activity increase of 4 times or more, and the catalyst of Example 3-1 showed an activity increase of 3.8 times or more. Compared with Comparative Example 2, which is a commercial carbon carrier catalyst, the catalyst of Example 1-1 showed 1.5 times or more, and the catalyst of Example 3-1 showed performance improvement of 1.4 times or more.

In addition, the evaluation of durability was evaluated _{based on the time to reach 2 V RHE} , and the catalyst of Example 3-1 showed the highest durability, which was 6 times or more compared to the catalyst of Comparative Example 1, Comparative Example 2 showed more than twice the durability compared to the catalyst of

Therefore, it was confirmed that the catalyst of Example 3-1 showed the best durability while exhibiting higher performance than the catalysts of Comparative Examples 1 and 2 when both activity and durability were considered.

As the specific part of the present invention has been described in detail above, for those of ordinary skill in the art to which the present invention pertains, it is clear that these specific techniques are only preferred embodiments, and the scope of the present invention is not limited thereto. do. Those of ordinary skill in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above contents.

Accordingly, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

Claims (8)

In the catalyst carrier for oxygen evolution reaction,
a carbon nanotube whose surface is partially oxidized through acid treatment to form an oxide adsorption point; and
Including; oxide nanoparticles coated on the oxide adsorption point;
By surface-modifying the oxide adsorption point with sodium lauryl sulfate, the area where the oxide nanoparticles can be coated is expanded and the coating amount of the oxide nanoparticles is controlled, characterized in that the coating amount of the oxide is controlled using a surfactant Carbon nanotube carrier. The carbon nanotube carrier according to claim 1, wherein the oxide is tin oxide, the coating amount of which is controlled using a surfactant. The carbon nanotube carrier according to claim 1, wherein the content ratio of the carbon nanotubes and sodium lauryl sulfate is 1:2 to 1:10. In the method for producing a catalyst support for oxygen evolution reaction,
(i) generating an oxide adsorption point region by oxidizing a portion of the surface of the carbon nanotubes through acid treatment;
(ii) reforming the carbon nanotube with sodium lauryl sulfate to expand the oxide adsorption point region; and
(iii) coating the oxide nanoparticles on the oxide adsorption point region; a method for producing a carbon nanotube support in which the coating amount of the oxide is controlled using a surfactant, comprising: a. The method of claim 4, wherein the oxide is tin oxide, wherein the coating amount of the oxide is controlled using a surfactant. [Claim 5] The method of claim 4, wherein the content ratio of the carbon nanotubes and sodium lauryl sulfate is 1:2 to 1:10, wherein the coating amount of the oxide is controlled using a surfactant. [Claim 5] The method of claim 4, wherein the oxide nanoparticles are prepared by oxidizing metal ions through heat treatment. A supported catalyst for oxygen evolution reaction, wherein iridium or platinum particles are supported on the carbon nanotube support according to any one of claims 1 to 3.

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