KR101742799B1 - Preparation method of catalyst for HT-PEMFC adsorbed surfactants and HT-PEMFC catalyst adsorbed surfactants prepared therefrom - Google Patents

Abstract

The present invention relates to a method for preparing a catalyst for a high temperature proton exchange membrane fuel cell on which a surfactant is adsorbed and a catalyst for a high temperature proton exchange membrane fuel cell prepared thereby, the method comprising: (A) mixing a conductive carbon support and a surfactant; (B) adding a metal precursor to the mixed mixture; And (C) adding a reducing agent to the mixture containing the metal precursor to reduce the performance of the high-temperature proton exchange membrane fuel cell using the phosphoric acid-doped membrane by blocking the phosphate anion.

Description

The present invention relates to a catalyst for a high temperature proton exchange membrane fuel cell having a surfactant adsorbed thereon and a catalyst for a high temperature proton exchange membrane fuel cell prepared thereby.

The present invention relates to a method for preparing a catalyst for a high-temperature proton exchange membrane fuel cell in which a surfactant is adsorbed, which can inhibit performance deterioration of a high-temperature proton exchange membrane fuel cell using a membrane doped with specific anions by blocking specific anions, Exchange membrane fuel cell.

In recent years, major automobile manufacturers and parts companies in developed countries are hurrying to develop fuel cell vehicles through competition and cooperation.

Fuel cell vehicle uses fuel cell as energy source. Fuel cell generates electricity electrochemically by using oxygen in air and hydrogen in fuel. It supplies fuel and air externally, It is a system that can develop.

Fuel cells are highly efficient and pollution-free because they convert the chemical energy of the fuel directly into electrical energy without conversion to thermal energy.

In particular, proton exchange membrane fuel cells (PEMFC) have attracted much attention as a renewable energy source that can replace electric power production using fossil fuels.

However, commercialization thereof requires solving a number of technical problems including the use of expensive electrocatalysts to promote the oxygen reduction reaction (ORR) at the cathode. The most recent effort to improve the ORR activity of the cathode is to introduce the transition metal, apply various support materials, or control the electronic structure of the platinum electrocatalyst using organic compounds.

The recently developed high temperature PEMFC (HT-PEMFC) uses polybenzimidazole (PBI) membrane doped with H ₃ PO ₄ which is excellent in chemical and physical stability at high temperature (~ 180 ° C) There is an additional technical problem of deactivation of the Pt electrocatalyst due to poisoning.

As another method for improving the electrochemical activity, there has been reported a 'third-party (or ensemble) effect' which means blocking the toxic anion on the electrocatalyst ( J. Electrochem . Soc ., 1973, 120, 756) . It is reported that the incorporation of acetonitrile (CH ₃ CN) into platinum improves formic acid oxidation activity because it inhibits adsorption of inhibitory species on the surface.

In addition, it has been reported that ORR is selectively inhibited by hydrogen peroxide ( Nat. Mater . 2010, 9, 998) by a calix [4] -arene molecule having a conical structure.

Similar effects have also been reported for ORR in the presence of phosphoric acid. Adsorption of cyanide ion (CN ^- ) on the surface of platinum results in H ₂ SO ₄ And H ₃ PO ₄ ( Nat. Chem ., 2010, 2, 880) has been reported to significantly reduce the poisoning by adsorption of certain anions such as the anion derived. These results are due to selective blocking of toxic anions.

Therefore, there is a demand for a catalyst that can effectively exhibit a third-party effect in association with adsorption of a specific anion.

An object of the present invention is to provide a method for preparing a catalyst for a high temperature proton exchange membrane fuel cell in which a surfactant is adsorbed, which can inhibit performance deterioration of a high temperature proton exchange membrane fuel cell using a membrane doped with specific anions by blocking specific anions.

Another object of the present invention is to provide a catalyst for a high-temperature proton exchange membrane fuel cell manufactured according to the above-described method.

In order to accomplish the above object, the present invention provides a method for preparing a catalyst for a high temperature proton exchange membrane fuel cell in which a surfactant is adsorbed, comprising the steps of: (A) mixing a conductive carbon support and a surfactant; (B) adding a metal precursor to the mixed mixture; And (C) adding a reducing agent to the mixture of the metal precursor and reducing the metal precursor.

The surfactant and the metal precursor may be mixed in a molar ratio of 1: 0.1-0.8.

In the step (A), the conductive carbon support may be selected from the group consisting of carbon black, acetylene black, carbon nanotube (CNT), graphite, graphene, graphite nanofiber (GNF) It may be more than one kind.

In the step (A), the surfactant may be selected from the group consisting of oleylamine, oleyl mercaptan, oleamide, cetylamine, behenyltrimethylammonium chloride and cetyltrimethylammonium And cetyltrimethylammonium chloride.

In the step (A), the conductive carbon support and the surfactant may be dissolved in at least one solvent selected from the group consisting of methanol, isopropyl alcohol, 1-butanol and ethanol.

In the step (B), the metal precursor may be at least one selected from the group consisting of platinum chloride, platinum acetylacetonate, platinum nitrate, platinum bis (benzonitrile) dichloride, platinum oxide, platinum halide, and platinum acetate. [0027] The term " catalyst "

In the step (C), the reducing agent may be at least one selected from the group consisting of lithium borohydride (LiBH ₄ ), sodium borohydride (NaBH ₄ ), borane tert-butylamine and hydrazine (N ₂ H ₄ ) .

In order to achieve the above objects, the present invention provides a catalyst for high temperature proton exchange membrane fuel cell adsorbed on a surfactant according to the present invention.

60 to 75% of the catalyst surface area may be adsorbed to the surfactant.

The catalyst for a high temperature proton exchange membrane fuel cell on which the surfactant of the present invention is adsorbed is capable of blocking specific anions, preferably phosphate anions, and is thus applicable to a high temperature proton exchange membrane fuel cell using a phosphate-doped membrane (PBI) Deterioration of the performance of the battery can be suppressed.

In addition, the catalyst of the present invention can be produced by a simple process without the step of removing the surfactant as in the conventional method.

1 is a conceptual diagram showing a third-party effect on the surface of platinum for an oxygen reduction reaction in the presence of a specific anion.
2A is a photograph (left) of a TEM photograph of a sPt-OA catalyst prepared according to an embodiment of the present invention, a high-resolution TEM image, a fast Fourier transform (FFT) pattern, and an inverse FFT image (right).
FIG. 2B is a graph of the X-ray absorption edge structure (XANES) of the Pt L ₃ edge measured using the 8C beamline of the PLS-II sPt-OA catalyst prepared according to an embodiment of the present invention.
2C is a CV and polarization curve for the ORR at a rotational speed of 1600 rpm on the sPt-OA catalyst prepared according to one embodiment of the present invention.
FIG. 2D is a graph of mass correction kinetics current density measured at 0.9 V of the sPt-OA catalyst prepared according to one embodiment of the present invention.
FIG. 3 is a graph (black line) measured by X-ray diffraction (XRD) of the sPt-OA catalyst prepared according to an embodiment of the present invention and an fcc structure (red line) of platinum.
4 is a graph of thermogravimetric analysis (TGA) of the sPt-OA catalyst prepared according to one embodiment of the present invention.
5 is a graph showing the relationship between the catalyst (sPt-OA) of Example 1 and the catalyst (cPt) of Comparative Example 1 in a membrane-electrode assembly (MEA) using H ₃ PO ₄ -doped polybenzimidazole (p- (B) a kinetic current density graph at 0.7 V; (c) a durability test for 150 hours at a constant current density (0.2 A / cm ² ); (D). Fig.
Figure 6 shows the sPt-OA catalyst prepared according to one embodiment and the cPt catalyst prepared according to the comparative example at 0.6 V in a half cell using H ₃ PO ₄ doped polybenzimidazole (p-PBI) It is a graph of measured current density.

The present invention relates to a method for producing a catalyst for a high temperature proton exchange membrane fuel cell adsorbed on a surfactant and capable of suppressing deterioration of performance of a high temperature proton exchange membrane fuel cell using a phosphate-doped membrane by blocking phosphate anion, Exchange membrane fuel cell.

The catalyst for the high temperature proton exchange membrane fuel cell is a catalyst having a metal supported on a conductive carbon support.

Hereinafter, the present invention will be described in detail.

A method for preparing a catalyst for a high temperature proton exchange membrane fuel cell in which the surfactant of the present invention is adsorbed comprises the steps of: (A) mixing a conductive carbon support and a surfactant; (B) adding a metal precursor to the mixed mixture; And (C) adding a reducing agent to the mixture of the metal precursor and reducing the metal precursor.

The present invention relates to a process for synthesizing a catalyst adsorbed in an appropriate amount, preferably 60 to 75%, more preferably 65 to 70%, of the catalytically active surface, without the step of adsorbing the surface active agent separately on the catalyst and then removing it will be.

The surfactant-adsorbed catalyst of the present invention exhibits excellent performance without the additional step of removing the surfactant since the surfactant is adsorbed on the catalyst in such a ratio as described above.

First, in the step (A), the conductive carbon support and the surfactant are mixed in a solvent and dispersed by ultrasonic treatment.

The conductive carbon support and the surfactant exhibit excellent performance without any additional step of removing the surfactant even if they are mixed together by any method or the like.

The conductive carbon support may include at least one selected from the group consisting of carbon black, acetylene black, carbon nanotube (CNT), graphite, graphene, graphite nanofiber (GNF) .

The surfactant may be at least one selected from the group consisting of oleylamine, oleylmercaptan, oleamide, cetylamine, behenyltrimethylammonium chloride and cetyltrimethylammonium chloride.

 The solvent is such that the conductive carbon support and the surfactant are dispersed so that the surfactant does not cover most of the active surface on the surface of the catalyst. More specifically, the solvent is selected from the group consisting of methanol, isopropyl alcohol, 1-butanol and ethanol More than species.

Next, in the step (B), a metal precursor is added to the mixture mixed in the step (A) and stirred.

The metal precursor is a substance to be supported on the conductive carbon support, and the surfactant and the metal precursor are mixed in a molar ratio of 1: 0.1-0.8, preferably 1: 0.2-0.4. When the molar ratio of the metal precursor to the surface active agent is less than the lower limit, the surface of the metal may be entirely covered with the surfactant. If the mole ratio of the metal precursor is higher than the upper limit, only a part of the metal is covered with the surfactant, .

 The stirring is carried out for 1 to 5 hours, preferably for 2 to 3 hours; If the stirring time is less than the lower limit value, the metal precursor may not be supported on the carbon support. If the stirring time is longer than the lower limit, the metal precursor may be prevented from being supported on the carbon support.

In the step (B), mixing is performed by stirring rather than ultrasonic treatment. In the case of ultrasonic treatment, the surfactant may not be adsorbed on the surface of the catalyst after the reduction in the step (C).

Next, in the step (C), a reducing agent is added to the mixture mixed in the step (B) and the mixture is reduced to adsorb the surfactant on the surface of the catalyst.

Examples of the reducing agent include at least one selected from the group consisting of lithium borohydride (LiBH ₄ ), sodium borohydride (NaBH ₄ ), borane tert-butylylamine, and hydrazine (N ₂ H ₄ ) .

With respect to the adsorption of a specific anion, the catalyst of the present invention provides sufficient space by the adsorbed surfactant so that the oxygen reactant can contact the catalyst to effectively utilize the third-party effect to block specific anions.

As shown in FIG. 1, the catalyst of the present invention selectively blocks the adsorption of large anions due to bulky aliphatic hydrocarbon chains, while a surfactant that allows small-sized oxygen molecules to approach the metal surface is formed on the surface And the surfactant is used as a specific anion-blocking species.

The use of carbon black as a conductive carbon support, oleylamine as a surfactant, ethanol as a solvent, platinum chloride as a metal precursor, and sodium borohydride as a reducing agent can prevent the phosphate anion from being removed without removing the surfactant As well as a 3 to 5-fold improvement in kinetic current density, a 1.5 to 2.0-fold increase in catalytic activity, and a 1.8 to 2.5-fold increase in activity per mass compared to a Pt / C catalyst generally used for commercial use.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.

Example 1. Preparation of olefin amine (OA) adsorbed Pt / C catalyst (sPt-OA catalyst)

The sPt-OA catalyst Was synthesized by colloid reduction method using surfactant.

After ultrasonication, carbon black (0.15 g, Vulcan XC-72) and oleylamine (184 uL, 0.57 mmol) were dispersed in ethanol (200 mL, anhydrous 99.5%) and platinum chloride IV (0.064 g, 0.19 mmol , PtCl ₄ , > 99.99%, Sigma-Aldrich) was added and stirred for 2 hours. Sodium borohydride (0.1500 g, NaBH ₄ , 99.99%, Aldrich) was added for reduction and stirred for 12 hours, followed by filtration with ethanol and drying in a vacuum oven to prepare an sPt-OA catalyst.

Comparative Example 1 Preparation of Pt / C catalyst (cPt catalyst) _ Commercial catalyst

0.05 g of carbon black (carbon support) was mixed with 100 mL of ethylene glycol solvent and dispersed using ultrasonic wave for 20 minutes. On the other hand, 0.0332 g of H ₂ PtCl ₆ .6H ₂ O was dissolved in 10 mL of ethylene glycol and dispersed using ultrasonic waves for 5 minutes.

The carbon support solution and the Pt precursor solution were mixed and stirred for 30 minutes, the pH of the suspension was adjusted to 12, and the mixture was heated at 160 ° C for 3 hours for reduction, followed by stirring at room temperature for 12 hours. After completion of the reaction, the pH of the obtained precipitate was adjusted to 3, the precipitate was washed with deionized water to remove all impurities, dried at 40 ° C in a vacuum oven for 24 hours, and finally heat treated at 160 ° C or higher to prepare a Pt / C catalyst Respectively.

<Test Example>

Test Example  One. sPt - OA  Catalyst evaluation

2A is a photograph (left) of a TEM photograph of a sPt-OA catalyst prepared according to Example 1 of the present invention, a high resolution TMM image, a fast Fourier transform (FFT) pattern and an inverse FFT image (right); FIG. 2B is a X-ray absorption edge structure (XANES) graph of a Pt L ₃ edge measured using an 8C beamline of a PLS-II sPt-OA catalyst prepared according to Example 1 of the present invention; Figure 2c is the CV and polarization curves for ORR at sPt-OA catalyst prepared according to Example 1 of the present invention at a rotational speed of 1600 rpm; FIG. 2D is a graph of mass-corrected kinetic current density measured at 0.9 V of the sPt-OA catalyst prepared according to Example 1 of the present invention.

3 is a graph (black line) measured by X-ray diffraction (XRD) of the sPt-OA catalyst prepared according to Example 1 of the present invention and an fcc structure (red line) of platinum; FIG. 4 is a graph of thermogravimetric analysis (TGA) of the sPt-OA catalyst prepared according to Example 1 of the present invention.

As shown in FIGS. 2A and 3, the sPt-OA catalyst has a diameter of 2 to 3 nm (FIG. 2A, left photograph), an X-ray diffraction pattern A typical face-centered cubic (fcc) structure was identified from a Fourier transform (FFT) pattern (Fig. 2a, right photograph). Further, a typical lattice distance of platinum was confirmed from a high-resolution transmission electron microscope (HR-TEM) image (Fig.

As shown in FIG. 2B, it was confirmed from the X-ray absorption edge structure (XANES) spectrum of the Pt L ₃ edge that the d-band interval of the sPt-OA catalyst proportional to the white line strength of the L 3 edge was small, This means that the oleylamine molecule adsorbed on the sPt-OA nanoparticles to change the electronic structure.

Also, as shown in FIG. 2C, the effect of adsorption of oleylamine on sPt-OA was evaluated by a half-cell test.

As shown in FIG. 2 (d), the kinetic current density except for the diffusion effect of ORR at 0.9 V _RHE was compared with that of sPt-OA (24.8 A / g _Pt ) in the presence of 0.1 M H ₃ PO _4, cPt, 20.3 A / g _Pt ), and the addition of phosphoric acid (PA) significantly reduced the catalytic activity of sPt-OA. This result implies that the performance of a proton exchange membrane fuel cell (PEMFC) using polybenzimidazole / phosphoric acid (PBI / PA) electrolyte can be improved when sPt-OA catalyst is used.

Also as shown in Fig. 4, the Pt content of the sPt-OA catalyst was determined to be 17.5 wt% from the residual weight after thermogravimetric analysis (TGA). The weight loss in the range of 150 to 400 where the adsorbed oleylamine molecules were pyrolyzed was about 2.5 wt%.

Test Example  2. Single cell  exam

5 is a graph showing the relationship between the catalyst (sPt-OA) of Example 1 and the catalyst (cPt) of Comparative Example 1 in a membrane-electrode assembly (MEA) using H ₃ PO ₄ -doped polybenzimidazole (p- 5A is a graph of a kinetic current density at 0.7 V, FIG. 5D is a graph showing a constant current density (0.2 A / cm &lt; 2 &gt; cm &lt; ² &gt;) for 150 hours.

Further, Figure 6 is post catalyst (cPt) in comparison with the H ₃ PO ₄ doped poly benz imidazol (p-PBI) catalyst (sPt-OA) of the first embodiment in not reversed to 0.6 V using a film Example 1 (Cathode: 0.30 and 0.26 mg _Pt / cm &lt; ² &gt; respectively).

5 and 6 were performed while supplying H ₂ / air not humidified at 160 ° C.

The test of the unit cell was conducted by introducing the sPt-OA catalyst into the membrane-electrode assembly (MEA) using a para-polybenzimidazole (p-PBI) membrane doped with H ₃ PO ₄ (Pt content: 0.26 mg _Pt / cm ² ); As a comparative sample, an MEA containing a cPt catalyst (Pt content: 0.30 mg _Pt / cm ² ) was used. In order to fix the effect of compression on the MEA, the thickness of the catalyst layer was made similar through control of the Pt content. It is well known that, in the case of a high temperature PEMFC using a PBI / PA membrane, the electrocatalyst is seriously poisoned by the adsorption of phosphate anion by H ₃ PO ₄ .

As shown in FIG. 5A, the sPt-OA catalyst exhibits a high cell voltage in the low current density region, which is consistent with the results of the reverse current test (FIG. 6). In the low current region, the cell performance is mainly determined by the ORR activity of the cathode, while the mass transfer characteristic is more important in the high current condition.

Also, as shown in FIG. 5B, the ORR activity of the sPt-OA catalyst was clearly confirmed from the Tafel road.

As shown in FIG. 5C, the kinetic current densities of the cPt catalyst (Comparative Example 1) and the sPt-OA catalyst (Example 1) were confirmed to be 0.024 A / cm ² and 0.038 A / cm ² , respectively. It can be seen that the kinetic current density of the sPt-OA catalyst is about 1.6 times higher than that of the cPt catalyst, even though the Pt content of the sPt-OA catalyst is 13% lower. As a result of the single cell test, the activity per mass of sPt-OA catalyst is calculated to be 1.9 times higher than that of cPt catalyst.

Also, as shown in FIG. 5D, it was confirmed that a stable cell voltage was observed during 150 hours of operation under a constant current of 0.2 A / cm ² in all the MEAs prepared using cPt catalyst and sPt-OA catalyst as an electrocatalyst.

The cell performance was found to be excellent over the entire range of durability tests.

As a result, it was confirmed that the third-party effect of the surfactant can increase the ORR activity of the sPt-OA catalyst despite the very small ECSA in the presence of anions. In addition, as a result of electrochemical analysis of the sPt-OA catalyst adsorbed on the surfactant, it was confirmed that the toxic anion was blocked and the ORR activity was increased. As a result of the experiment on the commercialized PEMFC system under the severe anion adsorption condition, It was confirmed that the battery performance can be improved by the third-party effect.

-device-

C K edge of NEXAFS (Near edge X-ray absorption fine structure) spectra Pohang Light Source-II are measured using a 4D beamline of (PLS-II, 3 GeV) , HR-TEM (High-resolution transmission electron microscopy) Is obtained with a Titan 80-300 (300 kV, FEI) and analyzed by the Gatan Digital Micrograph software package.

The X-ray absorption near-edge structure (XANES) spectrum of the Pt L ₃ edge (E 0 = 11,564 eV) is measured using an 8C beamline of PLS-II. Data analysis is performed using the ATHENA program.

In addition, XRD (X-ray diffraction, D / Max 2500, Rigaku) was measured at a scan angle of 20 ° to 90 ° with a scan rate of 0.5 ° / min and TGA (Thermogravimetric analysis) Measured at a heating rate of Q50 (TA Instruments).

- Electrochemical measurement:

Electrochemical measurements are performed using a three electrode system: i) a glassy carbon electrode (0.196 cm ² , one electrode), ii) a saturated calomel electrode (SCE with saturated KCl, reference electrode), and iii) (Counter electrode).

Electrocatalytic ink preparation: Electrocatalyst (0.015 g), 2-propanol (1200 uL, Junsei), and Nafion solution (85.8 uL, 5 wt%, Aldrich) were mixed.

The catalyst ink (5 uL) was dropped as one electrode, and the preliminary potential cycling was performed until a stable curve was obtained. The proposed catalyst [e.g., 0.1 M HClO ₄ (70%, Sigma-Aldrich); 0.1 M HClO ₄ +0.01 MH ₃ PO ₄ (85%, Sigma-Aldrich); And 0.1 M HClO ₄ +0.1 MH ₃ PO ₄ ].

Cyclic voltamograms (CV) were obtained at a scanning rate of 20 mV / s under argon (Ar), and the polarization curves for ORR (oxygen reduction reactions) were obtained at 1600 rpm and 5 mV / s (RDE) technique. &Lt; / RTI &gt;

All electrochemical measurements are performed at room temperature using AUTOLAB potentiostat (Eco Chemie, PGSTAT), and the potential is normalized to reversible hydrogen electrode (RHE).

- Electrochemical measurement: Single cell -

Membrane electrode assemblies (MEAs) were fabricated using gas diffusion electrodes (GDE, 4 cm ² ) and para-polybenzimidazole (p-PBI) membranes doped with H ₃ PO ₄ .

For comparison, other cathode electrocatalysts (1.5 mg / cm 2) (eg, cPt and sPt-OA) were utilized in a gas diffusion layer (Sigracet 10BC, SGL Co.) using a spray method. Commercial Pt / C (cPt, 46 wt%, Tanaka Kikinzoku Kogyo, KK) is used as the anode electrocatalyst in each MEAs (2.2 mg / cm2) to negate the contribution at the anode.

The electrochemical measurements are performed at 160 占 폚 using a PEMFC test station (CNL Energy Co.), and the anode and cathode gas feeds are non-wetted H ₂ (55 sccm) and air (196 sccm), respectively.

After the activation process (0.2 A / cm), electrochemical impedance spectroscopy (EIS, HCP 803, Bio-logic) is performed with different currents in the 50 kHz to 30 MHz frequency range.

The endurance test was performed at a constant current density (0.2 A / cm) over 150 hours.

Claims (9)

A method for preparing a catalyst for a high temperature proton exchange membrane fuel cell in which a metal is supported on a conductive carbon support,
(A) mixing a conductive carbon support and a surfactant;
(B) adding a metal precursor to the mixed mixture and stirring the mixture, wherein the surfactant and the metal precursor are mixed at a molar ratio of 1: 0.1-0.8; And
(C) adding a reducing agent to the mixed mixture of the metal precursor and reducing the catalyst, wherein 60 to 75% of the catalyst surface area for the high temperature proton exchange membrane fuel cell is adsorbed as a surfactant, (JP) METHOD FOR PRODUCING CATALYST FOR HIGH - delete The method of claim 1, wherein the conductive carbon support comprises carbon black, acetylene black, carbon nanotubes (CNT), graphite, graphene, graphite nanofibers (GNF) Fullerene, and fullerene. The catalyst for high temperature proton exchange membrane fuel cell according to claim 1, wherein the surfactant is selected from the group consisting of fullerene, fullerene, and fullerene. The method according to claim 1, wherein the surfactant in the step (A) is at least one selected from the group consisting of oleylamine, oleylmercaptan, oleamide, cetylamine, behenyltrimethylammonium chloride and cetyltrimethylammonium chloride Wherein the surfactant is adsorbed on the surface of the proton exchange membrane fuel cell. The method according to claim 1, wherein the conductive carbon support and the surfactant are dissolved in at least one solvent selected from the group consisting of methanol, isopropyl alcohol, 1-butanol and ethanol in the step (A) Of the catalyst for a high temperature proton exchange membrane fuel cell. The method of claim 1, wherein the metal precursor in step (B) is selected from the group consisting of platinum chloride, platinum acetylacetonate, platinum nitrate, platinum bis (benzonitrile) dichloride Wherein the catalyst is at least one selected from the group consisting of platinum oxide, platinum halide and platinum acetate. The catalyst for high temperature proton exchange membrane fuel cell according to claim 1, The method according to claim 1, wherein the reducing agent is at least one selected from the group consisting of lithium borohydride (LiBH ₄ ), sodium borohydride (NaBH ₄ ) and hydrazine (N ₂ H ₄ ) A method for preparing a catalyst for a high temperature proton exchange membrane fuel cell in which an activator is adsorbed. A catalyst for high temperature proton exchange membrane fuel cell adsorbed with a surfactant prepared according to the method of any one of claims 1 to 7. delete

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