Hydrogen oxidation catalyst and method for producing the same

Abstract

The present invention provides a hydrogen oxidation catalyst capable of removing low-concentration hydrogen not only at room temperature but also at extremely low temperatures. The present invention relates to a hydrogen oxidation catalyst comprising a titania support having platinum clusters supported thereon, the platinum clusters being Pt 0 The Pt 0 provides a hydrogen oxidation catalyst having terrace, step and kink crystal faces, among which the terrace crystal faces are more numerous than the step and kink crystal faces.

Description

[Technical Field]

[0001] The present invention relates to a hydrogen oxidation catalyst and a method for producing the same, and more particularly to a hydrogen oxidation catalyst capable of controlling low concentrations of hydrogen not only at room temperature but also at cryogenic temperatures, and a method for producing the same. [Background technology]

[0002] As interest in hydrogen energy is growing worldwide, major countries such as the United States, Japan, and Europe are devoting themselves to the development of hydrogen energy technology. Furthermore, steady investment is being made in safety research into hydrogen leakage and explosiveness that can occur during the hydrogen energy process. Since hydrogen has the potential to spontaneously combust and explode in the surrounding atmosphere at concentrations of 4 vol% or more, safety concerns about hydrogen generated in various fields such as fuel cells, lead-acid batteries, and semiconductor processes are being raised.

[0003] Currently, research into hydrogen energy stability is primarily focused on hydrogen storage and isolation, leak prevention sensors, etc., and more recently, hydrogen removal technologies have been studied. Representative hydrogen removal technologies include igniters, thermal recombiners, and catalytic oxidation methods to prevent the damage caused by hydrogen explosions. Among these, igniters and thermal recombiners are methods of controlling hydrogen by injecting thermal energy up to the reaction temperature at which hydrogen recombines into water, but have the disadvantages of limited space and the need for a separate energy source.

[0004] On the other hand, catalytic oxidation technology is a technology that removes hydrogen by combining gaseous oxygen and hydrogen using a catalyst, and is a technology that can safely control hydrogen. Therefore, of the three methods mentioned above, catalytic oxidation technology, which combines hydrogen and oxygen using a catalyst, is currently attracting the most attention.

[0005] This catalytic oxidation technology has the advantage of being energy efficient, as it can recover the heat generated by the exothermic reaction between hydrogen and oxygen without a separate energy source and use it for heating or hot water, or as thermal energy required for the system. It also has the advantage of being able to process hydrogen generated in a sealed space using the natural convection phenomenon caused by the heat generated, allowing for continuous processing.

[0006] In relation to this, Korean Patent No. 10-0998325 discloses a manufacturing technology for a catalyst that oxidizes formaldehyde at room temperature using a platinum / titania catalyst, Korean Patent No. 10-1660014 relates to a platinum-based catalyst, specifically a platinum / titania catalyst that can remove hydrogen at room temperature, and Korean Patent No. 10-1331391 discloses a palladium / titania catalyst that is not a platinum / titania catalyst and a manufacturing method thereof, and discloses a palladium / titania catalyst that has the ability to remove formaldehyde, carbon monoxide, and hydrogen contained in air at room temperature and a manufacturing method thereof.

[0007] As described above, the prior art discloses catalysts that can remove hydrogen at room temperature, but the reality is that no catalysts that can remove low concentrations of hydrogen at extremely low temperatures have been disclosed. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention is intended to solve the above-mentioned problems of the prior art, and aims to provide a hydrogen oxidation catalyst that can remove low concentration hydrogen not only at room temperature but also at cryogenic temperatures. [Means for solving the problem]

[0009] The present invention provides a hydrogen oxidation catalyst comprising a titania support on which platinum clusters are supported, wherein the platinum clusters are Pt 0 The Pt 0provides a hydrogen oxidation catalyst that includes terrace, step, and kink crystal planes, and among the crystal planes, the terrace crystal planes are more numerous than the step and kink crystal planes.

[0010] In one embodiment of the present invention, the oxidation value ratio of the platinum cluster (Pt 0 / Pt total ) may be 40 to 50%.

[0011] In one embodiment of the present invention, the hydrogen oxidation catalyst may have hydrogen oxidation reaction activity in a temperature range from cryogenic temperatures (-10°C) to room temperatures (25°C).

[0012] In one embodiment of the present invention, the titania support may further support one or more promoters selected from palladium and antimony.

[0013] In one embodiment of the present invention, the hydrogen oxidation catalyst may have a hydrogen oxidation activity of 95% or more even under the condition that nitrogen oxides are simultaneously injected.

[0014] In one embodiment of the present invention, the hydrogen oxidation catalyst may have a hydrogen oxidation activity of 80% or more even under the condition that carbon monoxide is simultaneously injected.

[0015] The present invention also provides a method for producing a platinum cluster precursor, comprising supporting the platinum cluster precursor on a titania support and calcining the supported platinum cluster / titania at 200 to 300°C, wherein the platinum cluster precursor is Pt 0 The Pt 0 The present invention provides a method for producing a hydrogen oxidation catalyst having terrace, step, and kink crystal planes, in which the number of terrace crystal planes among the crystal planes is greater than the number of step and kink crystal planes within the calcination temperature range.

[0016] In one embodiment of the present invention, the platinum cluster precursor may be 0.5 parts by weight or more with respect to 100 parts by weight of the titania support.

[0017] In one embodiment of the present invention, the platinum cluster precursor may be any one of Ptc(MA), Ptc(EN), and Ptc(EA).

[0018] In one embodiment of the present invention, the oxidation value ratio (Pt 0 / Pt total ) may be 40 to 50%.

[0019] In one embodiment of the present invention, the method may further include supporting a promoter precursor containing at least one of palladium and antimony on the titania support before supporting the platinum cluster precursor on the titania support.

[0020] In one embodiment of the present invention, the promoter precursor may be present in an amount of 0.1 to 2.0 parts by weight relative to 100 parts by weight of the titania support. [Effects of the Invention]

[0021] The hydrogen oxidation catalyst of the present invention can effectively control low concentrations of hydrogen not only at room temperature but also at extremely low temperatures. 0 Since the oxidation valence species can be expressed as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 39, [Brief explanation of the drawings]

[0022] [Figure 1] shows Pt 0 FIG. 1 is a diagram showing the reaction crystal plane of 2 and 3 are graphs showing the hydrogen oxidation reaction activity depending on the hydrogen concentration and reaction temperature for each Pt precursor. FIG. 5 is a graph showing the hydrogen reaction activity as a function of the calcination temperature. [Figure 6] shows the results of FT-IR analysis showing the adsorption characteristics depending on the calcination temperature. FIG. 7 is a graph showing hydrogen oxidation activity depending on the Ptc content. [Fig. 8] and [Fig. 9] are graphs showing the hydrogen reaction activity depending on the addition of a promoter. [FIG. 10] and [FIG. 11] are graphs showing the hydrogen reaction activity depending on the content of the promoter added. [FIG. 12], [FIG. 13] and [FIG. 14] are diagrams showing hydrogen reaction activity when different concentrations of carbon monoxide and hydrogen are introduced simultaneously. [FIG. 15], [FIG. 16] and [FIG. 17] are diagrams showing hydrogen reaction activity when nitrogen oxides of different concentrations flow in simultaneously with hydrogen. FIG. 18 is a graph showing the hydrogen reaction activity at different reaction temperatures with the addition of a promoter. [FIG. 19] is a diagram showing the selective reaction activity for hydrogen and carbon monoxide. DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention can be modified in various ways and can have various embodiments, and the following specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to the specific embodiments, and it should be understood that the present invention includes all modifications, equivalents, and alternatives within the spirit and technical scope of the present invention. In describing the present invention, if it is determined that a detailed description of related publicly known technology may obscure the gist of the present invention, the detailed description will be omitted.

[0024] Figure 1 shows the Pt 0 FIG. 1 is a diagram showing the reaction crystal plane of

[0025] Referring to Figure 1, Pt 0As atoms grow in an arranged manner, it has a stepped crystal structure in which three reaction crystal planes are formed. When observing this stepped crystal structure three-dimensionally, the flat planes that appear flat are terrace planes, the corner planes that appear as steps between the terrace planes are step planes, and the apex planes where the step planes are cut or bent are kink planes. In this case, the step and kink planes have a very strong activation level, which makes dissociation and adsorption easy, while the terrace plane has a weak activation level, which makes molecules adsorb directly rather than dissociating and adsorbing. In addition, FT-IR (Fourier transform-infrared) analysis showed that the terrace planes have a wavelength of 2075 to 2100 wavenumbers (cm -1 ), and the step surface is 2050 to 2075 wavenumbers (cm -1 ), and the kink surface is 2000 to 2050 wavenumber (cm -1 ) can be used to define each reactive crystal plane. The three reactive crystal planes have different adsorption properties due to different atomic arrangements, and the activity of the hydrogen oxidation reaction varies depending on the growth level of each reactive crystal plane, which will be explained in detail in the experimental examples below.

[0026] In this specification, "platinum clusters (Pt clusters, Ptc)" refers to Pt that remains after being supported on a catalyst support and calcined. 0 A platinum structure comprising Pt 0 This refers to all platinum structures in which terrace planes are dominant among the reactive crystal planes. In this case, the reactive crystal planes related to the hydrogen oxidation reaction are not the entire Pt, but Pt 0 This makes it clear that this is the reaction crystal surface.

[0027] Also, in this specification, "Pt 0 The dominant presence of terrace surfaces is due to the Pt 0This means that the growth of the terrace planes among the reactive crystal planes is maximized, and the terrace planes are more numerous than the step and kink planes, and the specific gravity of the terrace planes, which serve as reactive crystal planes and adsorb hydrogen during the hydrogen oxidation reaction, is higher than the sum of the specific gravity of the step and kink planes. The present invention provides a hydrogen oxidation catalyst comprising a titania support on which platinum clusters are supported in order to remove low concentrations of hydrogen not only at room temperature but also at cryogenic temperatures, and the platinum clusters are Pt 0 The Pt 0 provides a hydrogen oxidation catalyst having terrace, step, and kink crystal faces, in which the number of terrace crystal faces is greater than the number of step and kink crystal faces.

[0028] In particular, unlike conventional technologies that can only remove hydrogen at room temperature using PtCl4 or Pt(OH)2 as platinum precursors, the present invention uses a hydrogen oxidation catalyst supported on platinum clusters to enable hydrogen removal not only at room temperature (25°C) but also at cryogenic temperatures (-10°C). The hydrogen removal effect at room temperature and cryogenic temperatures using platinum clusters will be explained in detail in the experimental examples below.

[0029] The platinum clusters, which correspond to the active metal, are Pt 0 or Pt 2+ Oxidation appears as a species, and Pt 0 is a major factor in the hydrogen oxidation reaction activity. In one embodiment of the present invention, the oxidation value ratio of the platinum cluster (Pt 0 / Pt total ) can indicate 40-50%.

[0030] Said Pt 0As mentioned above, different reaction crystal planes, such as terraces, steps, and kinks, are formed depending on the atomic arrangement, and the arrangement of atoms varies depending on the crystal plane, resulting in different adsorption properties. In the case of the conventional technology using Pt(OH)2 as the platinum precursor, hydrogen adsorption properties are only observed at room temperature. 0 The crystal planes of the Pt alloy are dominated by step and kink planes, with the step planes being particularly dense. In contrast, the present invention, which uses platinum clusters, exhibits low-concentration hydrogen adsorption properties not only at room temperature but also at extremely low temperatures. 0 The crystal plane of Pt is dominated by the Terrace plane. 0 When there are more Terrace planes than Step and Kink planes, it is possible to control low concentrations of hydrogen not only at room temperature but also at extremely low temperatures.

[0031] The titania support may further support one or more promoters selected from palladium and antimony, which may improve hydrogen oxidation activity at cryogenic temperatures and enhance resistance to poisoning caused by the simultaneous inflow of carbon monoxide and nitrogen oxides. These effects will be described in detail in the experimental examples below.

[0032] The present invention also provides a method for producing a hydrogen oxidation catalyst, comprising the steps of supporting a platinum cluster precursor on a titania support and calcining the titania support on which the platinum cluster precursor is supported.

[0033] The platinum cluster precursor can be any one of Ptc(MA), Ptc(EN), and Ptc(EA), with Ptc(MA) being preferred due to its high specific surface area and active particle size. In Ptc(MA), Ptc(EN), and Ptc(EA), MA stands for methyl alcohol, EN for nitric acid, and EA for ethyl alcohol, and each refers to a platinum cluster precursor prepared by the respective material treatments.

[0034] The platinum cluster precursor is preferably supported in an amount of 0.5 parts by weight or more relative to 100 parts by weight of the titania support, and within this range, it is possible to remove low concentration hydrogen present not only at room temperature but also at cryogenic temperatures.

[0035] In particular, the present invention provides a method for producing platinum cluster precursors by calcining a titania support on which the platinum cluster precursors are supported. 0 When a hydrogen oxidation catalyst is produced using conventional platinum precursors such as PtCl4 and Pt(OH)2, Pt 0 In order to produce an oxidized species of Pt, a reduction step must be performed after the catalyst calcination step. In contrast, the present invention uses a platinum cluster precursor, which can produce Pt only through the calcination step. 0 Since the oxidation valence species can be expressed as follows, the cost and time in the manufacturing process can be reduced.

[0036] The oxidation value ratio of the platinum cluster precursor reduced in the calcination step (Pt 0 / Pt total ) can be 40 to 50%, and within this range, low concentrations of hydrogen can be controlled not only at room temperature but also at extremely low temperatures.

[0037] The firing temperature in the firing step is preferably 200 to 300°C. 0 The oxidation of Pt can be maintained within the above ratio range, and the terrace surface appears dominantly, allowing for low-concentration hydrogen to be controlled at extremely low temperatures. If the ratio is outside the above range, the specific surface area of ​​the catalyst decreases significantly, and Pt 2+ The growth of Pt 0 Not only does the ratio of Pt 0 The growth of the Step and Kink planes reduces the specific gravity of the Terrace plane, resulting in a decrease in the activity of hydrogen oxidation at low temperatures and low concentrations.

[0038] In one embodiment of the present invention, the method may further include a step of supporting a promoter precursor containing at least one of palladium and antimony on the titania support before supporting the platinum cluster precursor on the titania support.

[0039] The promoter precursor can improve hydrogen oxidation activity at cryogenic temperatures and enhance resistance to poisoning caused by simultaneous inflow of carbon monoxide and nitrogen oxides, and is preferably supported in an amount of 0.1 to 2.0 parts by weight per 100 parts by weight of the titania support.

[0040] The present invention will be described in more detail below based on preferred experimental examples. However, the technical concept of the present invention is not limited to these examples and can be modified and implemented in various ways by those skilled in the art.

[0041] Experimental Example 1: Hydrogen Reaction Activity Comparison 2 and 3 are graphs showing the hydrogen oxidation reaction activity depending on the hydrogen concentration and reaction temperature for each Pt precursor, respectively.

[0042] Referring to Figure 2, the catalyst made from Ptc(MA) maintained 100% hydrogen oxidation reaction activity even at low hydrogen concentrations, while the catalysts made from PtCl4 and Pt(OH)2 showed a significant decrease in hydrogen oxidation reaction activity at low hydrogen concentrations.

[0043] 3, the catalyst prepared from Ptc(MA) maintained high hydrogen oxidation reaction activity not only at room temperature (25°C) but also at cryogenic temperatures (-10°C), whereas the catalysts prepared from PtCl4 and Pt(OH)2 showed almost no hydrogen oxidation reaction activity at cryogenic temperatures. In other words, the hydrogen oxidation catalyst according to the present invention is expected to be capable of controlling low concentrations of hydrogen not only at room temperature but also at cryogenic temperatures.

[0044] Experimental Example 2: Comparison of oxidation state and physical properties of different Pt precursors Table 1 shows the oxidation state and physical properties of each Pt precursor.

[0045] [Table 1]

[0046] Referring to Table 1, the specific surface area of ​​Ptc(MA) is about 4.5 times higher than that of PtCl4 and about 3.6 times higher than that of Pt(OH)2, the size of the reactive particles is 4.85 nm, and the lattice oxygen (O α Therefore, in relation to Experimental Example 1, it is believed that these excellent properties contribute to the high hydrogen oxidation reaction activity of the catalyst carrying platinum clusters according to the present invention.

[0047] Experimental Example 3: Comparison of adsorption characteristics by Pt precursor FIG. 4 shows the results of FT-IR analysis indicating the adsorption characteristics of each Pt precursor, and Table 2 shows the results of FT-IR analysis.

[0048] [Table 2]

[0049] Referring to Figure 4 and Table 2, Ptc(MA) is Pt 0 The terrace surface of Pt(OH)2 grows and adsorption occurs actively on the terrace surface. 0 It was confirmed that the step and kink planes of the catalyst developed and adsorption mainly occurred on the step plane. 0 The terrace surface of the above appears dominantly, and it is believed that hydrogen adsorption occurs actively on such terrace surface, making it possible to control low concentrations of hydrogen not only at room temperature but also at extremely low temperatures.

[0050] Experimental Example 4: Comparison of hydrogen reactivity, physical properties, and oxidation state depending on calcination temperature FIG. 5 and Table 3 show the results of the hydrogen reaction activity, physical properties, and oxidation state according to the calcination temperature of the present invention.

[0051] [Table 3]

[0052] Referring to FIG. 5 and Table 3, when fired at 200°C and 300°C, Pt0 The ratio and specific surface area were high, and the size of the reactive particles was small. However, when calcined at temperatures higher than 300°C, the specific surface area decreased dramatically and the size of the reactive particles increased. Above all, when calcined at 200°C and 300°C, high hydrogen reaction activity was observed not only at room temperature but also at cryogenic temperatures (-10°C). However, when calcined at temperatures higher than 300°C, the hydrogen reaction activity at room temperature gradually decreased, and it was confirmed that almost no hydrogen reaction activity was observed at cryogenic temperatures (-10°C). Therefore, it is concluded that the hydrogen oxidation catalyst carrying platinum clusters of the present invention, when calcined in the range of 200-300°C, has high low-concentration hydrogen control performance not only at room temperature but also at cryogenic temperatures.

[0053] Experimental Example 5: Comparison of adsorption characteristics depending on firing temperature FIG. 6 shows the results of FT-IR analysis showing the adsorption characteristics depending on the calcination temperature of the present invention, and Table 4 shows the results of FT-IR analysis.

[0054] [Table 4]

[0055] Referring to FIG. 6 and Table 4, the present invention 0 The terrace surface of the catalyst was dominant, and when fired at 300°C, the specific gravity of the terrace surface was highest at 85.2%, but when fired at temperatures higher than 300°C, the specific gravity of the terrace surface decreased. Therefore, it is believed that the hydrogen oxidation catalyst loaded with platinum clusters promotes the growth of the terrace surface when fired at 300°C, and has excellent low-concentration hydrogen control performance not only at room temperature but also at cryogenic temperatures.

[0056] Experimental Example 6: Comparison of hydrogen oxidation activity depending on Ptc content Figure 7 shows the hydrogen oxidation activity at different Ptc contents according to the present invention. As shown in Figure 7, the hydrogen oxidation activity at cryogenic temperatures (-10°C) increases with increasing Ptc content, and it was confirmed that the minimum Ptc content required for hydrogen oxidation activity at cryogenic temperatures is 0.1%. In other words, to control low concentrations of hydrogen at cryogenic temperatures, the Ptc content must be 0.1 parts by weight or more per 100 parts by weight of the titania support.

[0057] Experimental Example 7: Comparison of hydrogen reaction activity with the addition of promoters Figures 8 and 9 show the hydrogen reaction activity depending on the promoter addition. Referring to Figure 8, when Pd or Sb was added as a promoter, the hydrogen reaction activity was high at cryogenic temperatures (-10°C), while when no promoter was added, the hydrogen reaction activity was somewhat lower at cryogenic temperatures. Also, referring to Figure 9, it was revealed that when Ptc(MA) and Pt(OH)2, both of which also contained promoters, had a very large difference in hydrogen reaction activity at cryogenic temperatures. This confirmed that adding a promoter of Pd or Sb to the platinum cluster-supported hydrogen oxidation catalyst of the present invention can improve the hydrogen reaction activity at cryogenic temperatures (-10°C) even at low concentrations.

[0058] Experimental Example 8: Comparison of hydrogen reaction activity depending on promoter content Figures 10 and 11 show the hydrogen reactivity at different Pd and Sb contents, respectively. As shown in Figures 10 and 11, the low-concentration hydrogen reactivity at cryogenic temperatures (-10°C) improved as the Pd content increased from 0.1 to 0.5, and the low-concentration hydrogen reactivity at cryogenic temperatures improved as the Sb content increased from 1.0 to 2.0. However, when the Sb content exceeded 2.0, the hydrogen reactivity decreased slightly. This confirms that the low-concentration hydrogen reactivity at cryogenic temperatures can only be achieved when the cocatalyst is added in an amount of 0.1 to 2.0 parts by weight per 100 parts by weight of the titania support.

[0059] Experimental Example 9: Comparison of carbon monoxide poisoning resistance with the addition of promoters 12, 13 and 14 are graphs showing the hydrogen reaction activity when different concentrations of carbon monoxide are introduced simultaneously with hydrogen.

[0060] 12 and 13, when carbon monoxide of 2.5 ppm or 5.0 ppm concentration is simultaneously introduced with hydrogen at a reaction temperature of -10 to 25°C, when Pd or Sb is added as a promoter, the catalyst has high carbon monoxide poisoning resistance and the hydrogen reactivity is higher than when no promoter is added. In particular, when Pd is added as a promoter, the catalyst has high carbon monoxide poisoning resistance and the hydrogen reactivity is maintained at a high level.

[0061] Also, referring to FIG. 14, when 5.0 ppm of carbon monoxide is simultaneously introduced with hydrogen at a reaction temperature of 50°C, when Pd is added as a promoter, the hydrogen reactivity is close to 100%, indicating very high carbon monoxide poisoning resistance, whereas when Pt(OH)2 is used, the hydrogen reactivity is rapidly reduced, indicating very low carbon monoxide poisoning resistance.

[0062] Experimental Example 10: Comparison of nitrogen oxide poisoning resistance with the addition of promoters 15, 16 and 17 are graphs showing the hydrogen reaction activity when nitrogen oxides of different concentrations flow in together with hydrogen.

[0063] 15 and 16, when nitrogen oxides at a concentration of 2.5 ppm or 5.0 ppm are simultaneously introduced with hydrogen at a reaction temperature of -10 to 25°C, the addition of Pd or Sb as a promoter provides resistance to nitrogen oxide poisoning, resulting in higher hydrogen reactivity than when no promoter is added. In particular, the addition of Pd as a promoter provides high resistance to nitrogen oxide poisoning, maintaining high hydrogen reactivity. Furthermore, when compared with Experimental Example 9, it was confirmed that the improvement in poisoning resistance due to the addition of a promoter is greater for nitrogen oxides than for carbon monoxide.

[0064] Also, referring to FIG. 17, when 5.0 ppm of nitrogen oxides are simultaneously introduced with hydrogen at a reaction temperature of 50°C, the addition of Pd as a promoter results in a hydrogen reactivity of nearly 100%, indicating very high resistance to nitrogen oxide poisoning. However, the hydrogen reactivity of Pt(OH)2 is rapidly reduced, indicating very low resistance to nitrogen oxide poisoning.

[0065] Experimental Example 11: Comparison of hydrogen reaction activity at different reaction temperatures with the addition of a promoter Figure 18 shows the hydrogen reaction activity at different reaction temperatures depending on the promoter. Figure 18 shows that Pt(OH)2 without promoter exhibits hydrogen reaction activity only at 50°C, and exhibits almost no hydrogen reaction activity at extremely low temperatures (-10°C). On the other hand, Ptc(MA) with Pd promoter exhibits high hydrogen reaction activity over a wide temperature range from -10 to 50°C.

[0066] Experimental Example 12: Comparison of selective reaction activity between hydrogen and carbon monoxide Figure 19 shows the selective reactivity for hydrogen and carbon monoxide. Referring to Figure 19, Ptc according to the present invention or Ptc with a promoter added exhibits high reactivity for hydrogen even in the presence of both hydrogen and carbon monoxide, making it possible to selectively control hydrogen. However, Pt(OH)2 exhibits only reactivity for carbon monoxide, making it difficult to control hydrogen.

Claims

1. A hydrogen oxidation catalyst comprising a titania support having platinum clusters supported thereon, The platinum clusters are Pt 0 Including, Said Pt 0 includes terrace, step, and kink crystal planes, and among the crystal planes, the specific gravity of the terrace crystal planes is greater than the specific gravity of the step and kink crystal planes; The platinum clusters are present in an amount of 0.5 parts by weight or more relative to 100 parts by weight of the titania support; the content of the platinum clusters in the hydrogen oxidation catalyst is 0.5% by mass or more, The hydrogen oxidation catalyst has hydrogen oxidation reaction activity at temperatures ranging from cryogenic temperatures (-10°C) to room temperature (25°C). A hydrogen oxidation catalyst characterized by:

2. The oxidation value ratio (Pt 0 / Pt total 2. The hydrogen oxidation catalyst according to claim 1, wherein the ratio of the total amount of the catalyst to the total amount of the catalyst is 40 to 50%.

3. 2. The hydrogen oxidation catalyst according to claim 1, wherein the titania support further supports one or more promoters selected from the group consisting of palladium and antimony.

4. 4. The hydrogen oxidation catalyst according to claim 3, wherein the hydrogen oxidation catalyst has a hydrogen oxidation activity of 95% or more even under conditions where 5.0 ppm of nitrogen oxides are injected simultaneously with hydrogen at a reaction temperature of 50°C.

5. 4. The hydrogen oxidation catalyst according to claim 3, wherein the hydrogen oxidation catalyst has a hydrogen oxidation activity of 80% or more even under conditions where 5.0 ppm of carbon monoxide is injected simultaneously with hydrogen at a reaction temperature of 50°C.

6. The method includes the steps of supporting a platinum cluster precursor on a titania support, and calcining the supported platinum cluster precursor / titania at a calcination temperature in the range of 200 to 300°C to produce platinum clusters; The platinum cluster precursor is present in an amount of 0.5 parts by weight or more relative to 100 parts by weight of the titania support, The platinum clusters are Pt 0 Including, Said Pt 0 The crystal planes include terrace, step, and kink crystal planes, and the specific gravity of the terrace crystal planes among the crystal planes is higher than the specific gravity of the step and kink crystal planes within the firing temperature range. A method for producing a hydrogen oxidation catalyst.

7. 7. The method for producing a hydrogen oxidation catalyst according to claim 6, wherein the platinum cluster precursor is any one of Ptc(MA), Ptc(EN) and Ptc(EA).

8. In the calcination step, the calcination temperature of the reduced platinum cluster is 200 to 300°C, and the oxidation value ratio (Pt 0 / Pt total 7. The method for producing a hydrogen oxidation catalyst according to claim 6, wherein the ratio of the total amount of the catalyst to the total amount of the hydrogen oxidation catalyst is 40 to 50%.

9. 7. The method for producing a hydrogen oxidation catalyst according to claim 6, further comprising the step of supporting a promoter precursor containing at least one of palladium and antimony on the titania support before supporting the platinum cluster precursor on the titania support.

10. 10. The method for producing a hydrogen oxidation catalyst according to claim 9, wherein the promoter precursor is used in an amount of 0.1 to 2.0 parts by weight per 100 parts by weight of the titania support.

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