1T-phase iridium dioxide catalyst and preparation method thereof

Abstract

The invention discloses a 1T-phase iridium dioxide catalyst and a preparation method thereof. The method comprises the following steps: dissolving an iridium source material in a first liquid to generate a first solution; adding a crystal phase conversion agent into the first solution to generate a second solution; performing ultrasonic treatment and / or stirring on the second solution for a certain time to generate a third solution; adding a pro-oxidant into the third solution to generate a fourth solution, and drying the fourth solution to obtain 1T-phase iridium dioxide precursor powder; performing high-temperature oxidation on the 1T-phase iridium dioxide precursor powder to obtain an initial catalyst; and treating the initial catalyst to obtain the 1T-phase iridium dioxide catalyst. The 1T-phase two-dimensional iridium dioxide catalyst provided by the invention is different from traditional rutile-phase iridium dioxide in crystal structure and atom arrangement, and has a higher specific surface area; and in addition, excellent oxygen evolution activity and stability are achieved, and a brand new synthesis direction is provided for preparation of a novel high-activity and high-stability PEM OER electrocatalyst.

Description

Technical Field

[0001] The invention relates to the technical field of catalyst materials, and in particular to a 1T phase iridium dioxide catalyst and a preparation method thereof. Background Art

[0002] Hydrogen is an efficient clean energy carrier and a renewable energy source that can be stored in chemical form. Currently, water electrolysis is an environmentally friendly and efficient method for producing hydrogen. However, the oxygen evolution reaction (OER) on the anode side of the proton exchange membrane electrolyzer has slow kinetics and high overpotential, resulting in slow reaction rate and poor stability in the PEM electrolyzer. Therefore, it is of great significance to develop highly active and stable oxygen evolution electrocatalysts.

[0003] At present, IrO2 (iridium dioxide) is considered to be the most promising commercial catalyst. However, due to the high price and scarcity of iridium metal, it is very necessary to improve the catalytic performance of the oxygen evolution reaction and reduce the catalyst load. At present, commercial iridium dioxide catalysts usually exist in the form of rutile phase nanoparticles. The traditional rutile phase and irregular particle structure limit the oxygen evolution performance of iridium dioxide. Compared with the traditional rutile phase iridium dioxide, 1T phase iridium dioxide changes the crystal properties and atomic arrangement of the catalyst to make iridium dioxide have higher electrochemical performance. Therefore, the development of new crystal phase engineering to prepare a new crystal phase of iridium dioxide with excellent electrocatalytic activity and stability is urgently needed in the field of PEM hydrogen production technology. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a 1T phase iridium dioxide catalyst and a preparation method thereof.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A method for preparing a 1T phase iridium dioxide catalyst comprises the following steps: dissolving an iridium source material in a first liquid to generate a first solution; adding a crystal phase conversion agent to the first solution to generate a second solution; subjecting the second solution to ultrasonic and / or stirring reaction for a certain period of time to generate a third solution; adding a co-oxidant to the third solution to generate a fourth solution, and drying the fourth solution for a certain period of time to obtain a 1T phase iridium dioxide precursor powder; performing high temperature oxidation on the 1T phase iridium dioxide precursor powder to obtain an initial catalyst; The initial catalyst is filtered, washed, and dried to obtain a 1T phase iridium dioxide catalyst.

[0006] Furthermore, the iridium source material includes any one of K2IrCl6, H2IrCl6, IrCl3, IrCl4, IrO2, K3IrCl6, IrCl3, or a mixture of at least two of the materials.

[0007] Furthermore, the crystal phase conversion agent includes nitrogen-containing compounds and heterocyclic compounds.

[0008] Furthermore, the co-oxidant comprises metal nitrate.

[0009] Furthermore, the metal nitrate is a single metal nitrate or a mixture of at least two metal nitrates, and the metal includes K, Na, Li, and Cu.

[0010] Furthermore, the first liquid includes deionized water and / or pure water; the second liquid includes deionized water and / or pure water.

[0011] Furthermore, the molar ratio of the iridium source material, the crystal phase conversion agent, and the co-oxidant is 1: (1-300): (80-120).

[0012] Furthermore, the step of subjecting the 1T phase iridium dioxide precursor powder to high temperature oxidation to obtain the initial catalyst includes: placing the 1T phase iridium dioxide precursor powder in a high temperature reactor, heating it to 300 to 800 degrees Celsius at a rate of 1 to 10 degrees Celsius per minute, and keeping it in air for 0.5 to 5 hours to obtain the initial catalyst.

[0013] Furthermore, the initial catalyst is filtered, washed, and dried to obtain the 1T phase iridium dioxide catalyst, comprising: filtering, washing, and drying the initial catalyst with a second liquid to obtain the 1T phase iridium dioxide catalyst.

[0014] The present invention also relates to a 1T phase iridium dioxide catalyst, which is prepared by the above-mentioned preparation method.

[0015] The beneficial effects of the present invention are: 1. The crystal phase engineering developed in the present invention prepares 1T crystal phase iridium dioxide through the formation, breaking and arrangement of Ir-O bonds inside traditional rutile phase iridium dioxide, which improves the intrinsic activity and stability of the oxygen evolution reaction, makes it have good electrocatalytic performance and low overpotential, better meets the requirements of industrial PEM water electrolysis anode catalyst, and provides a new synthetic strategy for the preparation of new high-activity and high-stability OER electrocatalysts in the future.

[0016] 2. The process of preparing 1T phase iridium dioxide catalyst by the method of the present invention is convenient and efficient, and has good stability and reliability.

[0017] 3. The 1T phase iridium dioxide catalyst of the present invention has higher catalytic activity than traditional rutile phase iridium dioxide, which reduces energy consumption while increasing the reaction rate. Its durability and stability enable it to maintain high-activity catalysis for a long time, reducing the cost of maintenance and replacement.

[0018] 4. The preparation method of the 1T phase iridium dioxide catalyst of the present invention is suitable for industrial batch synthesis and has a wide range of applications.

[0019] 5. The preparation method of the 1T phase iridium dioxide catalyst of the present invention can provide a good opportunity for the domestic substitution of traditional rutile phase iridium dioxide catalyst.

[0020] 6. The preparation method of the 1T phase iridium dioxide catalyst of the present invention does not require strong alkalinity and high temperature mechanical thermal method, and has better environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The figure is a schematic diagram of the flow structure of a specific embodiment of the method for preparing the 1T phase iridium dioxide catalyst of the present invention; Figure 2 A transmission electron microscope photograph of a specific embodiment of a 1T phase iridium dioxide catalyst prepared by the preparation method of the 1T phase iridium dioxide catalyst of the present invention; Figure 3 A comparison chart of the X-ray diffraction intensities of the 1T phase iridium dioxide catalyst prepared by the preparation method of the 1T phase iridium dioxide catalyst of the present invention and the rutile phase iridium dioxide; Figure 4 This is a comparison diagram of linear polarization (LSV) curves of the 1T phase iridium dioxide catalyst prepared by the preparation method of the 1T phase iridium dioxide catalyst of the present invention, rutile phase iridium dioxide, and two commercial catalysts. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a method for preparing a 1T phase iridium dioxide catalyst comprises the following steps: (1) Dissolving an iridium source material in a first liquid to generate a first solution. The mass of the iridium source material can be set according to actual needs.

[0025] (2) Adding a phase conversion agent to the first solution to generate a second solution. The addition of the phase conversion agent plays an important role in the formation of the 1T crystal phase, so that the generated 1T phase iridium dioxide catalyst has a two-dimensional structure and a unique crystal phase, and has high activity and high stability.

[0026] (3) Ultrasonication and / or stirring the second solution for a certain period of time to generate a third solution. Ultrasonication and / or stirring can fully mix the reactants in the second solution, thereby improving the mixing uniformity of the third solution.

[0027] (4) Adding a co-oxidant to the third solution to generate a fourth solution, and drying the fourth solution for a certain period of time to obtain a 1T phase iridium dioxide precursor powder. Adding a co-oxidant and drying the fourth solution for a certain period of time is conducive to obtaining a 1T phase iridium dioxide precursor powder.

[0028] (5) High-temperature oxidation of the 1T-phase iridium dioxide precursor powder to obtain an initial catalyst. The 1T-phase iridium dioxide precursor powder can be oxidized by high-temperature oxidation to generate a final 1T-phase iridium dioxide catalyst.

[0029] (6) Filtering and washing the initial catalyst, and drying it to obtain a 1T phase iridium dioxide catalyst. By filtering and washing the initial catalyst, the residues or impurities in the initial catalyst can be removed, and by drying it, a high-quality 1T phase iridium dioxide catalyst can be obtained.

[0030] Among them, by adding a crystal phase converter during the synthesis process, the internal atomic bond arrangement of the 1T phase iridium dioxide catalyst can be changed to achieve a crystal form transformation. At the same time, the crystal phase converter can make the 1T phase iridium dioxide crystal grow along a two-dimensional structure, with large utilization rate and specific surface area of ​​iridium atoms and good oxygen evolution performance. The crystal phase converter induces iridium dioxide to exhibit lower charge transfer resistance, lower overpotential and higher durability of oxygen evolution reaction in acidic media.

[0031] In a specific embodiment, the iridium source material includes any one of K2IrCl6, H2IrCl6, IrCl3, IrCl4, IrO2, K3IrCl6, and IrCl3, or a mixture of multiple materials. The iridium source material has good water solubility and does not contain impurities harmful to the catalyst, and is suitable for being a precursor of the 1T phase iridium dioxide catalyst.

[0032] In a specific embodiment, the crystal phase conversion agent is a nitrogen-containing compound and a heterocyclic compound such as pyrrole and cysteamine. Wherein, unlike the traditional Adams combustion method, nitrogen-containing compounds and heterocyclic compounds such as pyrrole and cysteamine are added during the synthesis process to replace the chloride ions of the iridium source material in the complex. The results show that the addition of nitrogen-containing compounds and heterocyclic compounds such as pyrrole and cysteamine plays an important role in the formation process of the 1T crystalline phase, and the crystal structure and atomic bonds of the generated 1T phase iridium dioxide sample are different from the traditional rutile phase. In addition, the addition of nitrogen-containing compounds and heterocyclic compounds such as pyrrole and cysteamine induces the growth of a two-dimensional structure.

[0033] In a particular embodiment, the co-oxidant comprises a metal nitrate.

[0034] In a specific embodiment, the metal nitrate includes: any one nitrate of metal K, Na, Li, Cu or a mixture of multiple nitrates.

[0035] In a specific embodiment, the first liquid includes deionized water and / or pure water with high purity.

[0036] In a specific embodiment, the molar ratio of the iridium source material, the crystal phase conversion agent, and the co-oxidant is 1: (1-300): (80-120), which can facilitate the acquisition of a high-performance 1T-phase iridium dioxide catalyst.

[0037] In a specific embodiment, the step of ultrasonically treating and / or stirring the second solution for a certain period of time to generate a third solution includes: ultrasonically treating and / or stirring the second solution for a certain period of time to generate the third solution, which can make the reactants of the second solution fully mixed, thereby better improving the mixing uniformity of the third solution.

[0038] In a specific embodiment, the step of drying the fourth solution for a certain time to obtain a 1T phase iridium dioxide precursor powder includes: drying the fourth solution at a certain temperature for a certain time to obtain a 1T phase iridium dioxide precursor powder.

[0039] In a specific embodiment, the step of high-temperature oxidation of 1T-phase iridium dioxide precursor powder to obtain an initial catalyst includes: placing the 1T-phase iridium dioxide precursor powder in a heating container, heating it to 300-800 degrees Celsius at a rate of 1-10 degrees Celsius per minute, and maintaining it in air or an oxygen-containing atmosphere for 0.5-5 hours to obtain the initial catalyst, which can enable the 1T-phase iridium dioxide precursor powder to be fully oxidized at high temperature to better obtain the initial catalyst.

[0040] In a specific embodiment, the initial catalyst is filtered, washed, and dried to obtain a 1T-phase iridium dioxide catalyst, including the steps of filtering, washing, and drying the initial catalyst with a second liquid to obtain a 1T-phase iridium dioxide catalyst. Filtering and washing the initial catalyst with the second liquid can better remove residues or impurities in the initial catalyst, and a higher quality 1T-phase iridium dioxide catalyst can be obtained through drying.

[0041] In a specific embodiment, the second liquid includes deionized water and / or pure water with high purity.

[0042] When the preparation method of the 1T phase iridium dioxide catalyst of the present invention is used, iridium dioxide with a 1T crystal structure can be prepared simply and efficiently. At the same time, the 1T phase iridium dioxide has the characteristics of high specific surface area and / or two-dimensional structure, good oxygen evolution performance, and the 1T crystal structure exhibits lower overpotential, lower charge transfer resistance and higher OER electrocatalytic stability in acidic media.

[0043] Based on the above embodiments, Figure 2 As shown, the present invention also proposes a 1T phase iridium dioxide catalyst, which is prepared by the 1T phase iridium dioxide catalyst preparation method, is convenient, efficient, and safe.

[0044] In a specific embodiment, Figure 2 As shown in Figure 1, the 1T phase iridium dioxide catalyst is a two-dimensional structure iridium dioxide catalyst with excellent oxygen evolution performance. Figure 3 As shown in FIG. 1 , the X-ray diffraction intensity comparison diagram of the 1T phase iridium dioxide catalyst and the rutile phase catalyst shows that the 1T phase iridium dioxide catalyst synthesized in the present invention is completely different from the XRD diffraction spectrum of the traditional rutile phase iridium dioxide catalyst and is a new crystal structure of iridium dioxide. Figure 4 As shown, the 1T phase structure and the two-dimensional structure make the electrochemical performance of the 1T phase iridium dioxide catalyst far superior to that of the traditional rutile phase iridium dioxide catalyst, the commercial Alpha catalyst and the commercial Umicore catalyst.

[0045] In a specific embodiment, Figure 2As shown, 1T phase iridium dioxide exists in a two-dimensional structure with uniform morphology.

[0046] In a specific embodiment, Figure 2 As shown, the thickness of the two-dimensional structure is 1-500 nm.

[0047] The 1T phase iridium dioxide catalyst of the present invention has a two-dimensional structure with a high specific surface area, good oxygen evolution performance, and exhibits low overpotential, low charge transfer resistance and excellent OER electrocatalytic stability in an acidic medium.

[0048] Some specific embodiments are listed below: Example 1 Dissolve 1 mmol of K2IrCl6·xH2O in 80 ml of deionized water to generate a first solution. Add the required amount of C4H5N (pyrrole) with n (K2IrCl6·xH2O):n (C4H5N) = 1:10 to the first solution to generate a second solution. The second solution is subjected to ultrasonic reaction for 1 hour to generate a third solution. 100 mmol of KNO3 is added to the third solution to generate a fourth solution. The fourth solution is stirred and reacted at 80 degrees Celsius for 1 hour until the water is almost completely evaporated to obtain a 1T phase iridium dioxide precursor powder. The obtained 1T phase iridium dioxide precursor powder is placed in a quartz porcelain boat, heated to 450 degrees Celsius at a rate of 5 degrees Celsius per minute, and kept in air for 0.5 hours to obtain an initial catalyst. The initial catalyst obtained is filtered and washed with deionized water, and dried in an oven at 60 degrees Celsius to obtain a 1T phase iridium dioxide catalyst.

[0049] Example 2 0.5 mmol K2IrCl6·xH2O and 0.5 mmol H2IrCl6 are dissolved in 80 ml pure water to generate a first solution. The required amount of C4H5N (pyrrole) with n (K2IrCl6·xH2O) : n (C4H5N) = 1:50 is added to the obtained first solution to generate a second solution. The obtained second solution is subjected to ultrasonic reaction for 1.5 hours to generate a third solution. 120 mmol NaNO3 is added to the obtained third solution to generate a fourth solution. The obtained fourth solution is stirred and reacted at 80 degrees Celsius for 1 hour until the water evaporates to obtain a 1T phase iridium dioxide precursor powder. The obtained 1T phase iridium dioxide precursor powder is placed in a quartz porcelain boat, heated to 500 degrees Celsius at a rate of 10 degrees Celsius per minute, and kept in air for 1 hour to obtain an initial catalyst. The obtained initial catalyst is filtered and washed with deionized water, and dried in an oven at 80 degrees Celsius to obtain a 1T phase iridium dioxide catalyst.

[0050] Example 3 Dissolve 1 mmol of IrCl3·xH2O in 80 ml of deionized water to generate a first solution. Add the required amount of C5H5N (pyridine) with n (K2IrCl6·xH2O):n (C5H5N) = 1: 100 to the first solution to generate a second solution. The second solution is subjected to ultrasonic reaction for 3 hours to generate a third solution. Add 50 mmol of NaNO3 and 50 mmol of KNO3 to the third solution to generate a fourth solution. Radiation dry the fourth solution until the water evaporates to obtain a 1T phase iridium dioxide precursor powder. The obtained 1T phase iridium dioxide precursor powder is placed in a crucible, heated to 450 degrees Celsius at a rate of 10 degrees Celsius per minute, and kept in air for 0.5 hours to obtain an initial catalyst. The initial catalyst obtained is filtered and washed with deionized water, and freeze-dried to obtain a 1T phase iridium dioxide catalyst.

[0051] Example 4 Dissolve 1 mmol of H2IrCl6·xH2O in 100 ml of deionized water to generate a first solution. Add the required amount of n(H2IrCl6·xH2O): n(C5H 11 N) = 1:100 C5H 11 N (piperidine) to generate a second solution. The obtained second solution was subjected to ultrasonic reaction for 1.5 hours to generate a third solution. 100 mmol of KNO3 was added to the obtained third solution to generate a fourth solution. The obtained fourth solution was stirred and reacted at 90 degrees Celsius for 1 hour until the water evaporated to obtain a 1T phase iridium dioxide precursor powder. The obtained 1T phase iridium dioxide precursor powder was placed in an alumina porcelain boat, heated to 500 degrees Celsius at a rate of 5 degrees Celsius per minute, and kept in air for 0.5 hours to obtain an initial catalyst. The initial catalyst obtained was filtered and washed with deionized water, and dried in an oven at 60 degrees Celsius to obtain a 1T phase iridium dioxide catalyst.

[0052] Example 5 1 mmol K2IrCl6·xH2O was dissolved in 1000 ml deionized water to generate a first solution. The required amount of C2H7NS (cysteamine) with n (K2IrCl6·xH2O) : n (C2H7NS) = 1:3 was added to the obtained first solution to generate a second solution. The obtained second solution was subjected to ultrasonic reaction for 1.5 hours to generate a third solution. 120 mmol NaNO3 was added to the obtained third solution to generate a fourth solution. The obtained fourth solution was freeze-dried to obtain a 1T phase iridium dioxide precursor powder. The obtained 1T phase iridium dioxide precursor powder was placed in a quartz boat, heated to 450 degrees Celsius at a rate of 5 degrees Celsius per minute, and kept in pure oxygen for 0.5 hours to obtain an initial catalyst. The obtained initial catalyst was filtered and washed with deionized water, and dried in an oven at 60 degrees Celsius to obtain a 1T phase iridium dioxide catalyst.

[0053] Example 6 Dissolve 1 mmol of K2IrCl6·xH2O in 80 ml of deionized water to generate a first solution. Add the required amount of C4H5N (pyrrole) with n (K2IrCl6·xH2O):n (C4H5N) = 1:100 to the first solution to generate a second solution. The second solution is subjected to ultrasonic reaction for 1.5 hours to generate a third solution. Add 100 mmol of KNO3 to the third solution to generate a fourth solution. Stir the fourth solution at 80 degrees Celsius for 1 hour until the water evaporates to obtain a 1T phase iridium dioxide precursor powder. Place the obtained 1T phase iridium dioxide precursor powder in a high-temperature oxidation furnace, heat it to 450 degrees Celsius at a rate of 5 degrees Celsius per minute, and cool it naturally for 1 hour to obtain an initial catalyst. The initial catalyst obtained is filtered and washed with deionized water, and dried at 60 degrees Celsius in a vacuum oven to obtain a 1T phase iridium dioxide catalyst.

[0054] Example 7 In a 0.1 mol HClO4 electrolyte, the electrolyte temperature was stabilized at 25 °C by water bath heating. A typical three-electrode system Pt material was used as the working electrode with an electrode area of ​​0.2 cm 2 (0.2 per square centimeter), that is, the current density is 10 mA cm −2 (milliamperes per square centimeter) corresponds to a current of 0.002 A (ampere) and a current density of 100 mA cm −2 The corresponding current is 0.02 A, Ag / AgCl (silver-silver chloride catalyst) material is used as the reference electrode, and Pt (platinum) mesh is used as the counter electrode). The linear polarization curves of the commercial Alpha catalyst, the commercial Umicore catalyst, the rutile iridium dioxide, and the 1T phase iridium dioxide catalyst prepared by the present invention are tested (such as Figure 4 As shown in the figure), when the current density is 10 mA cm−2 When the potentials of the 1T phase iridium dioxide catalyst, rutile iridium oxide, alpha catalyst, and Umicore catalyst prepared by the present invention are 1.462 V, 1.511 V, 1.570 V, and 1.638 V, respectively, which are converted into overpotentials of 232 mV, 281 mV, 340 mV, and 408 mV, respectively. As shown in Table 1 below, the overpotentials required for different current densities for the 1T phase iridium dioxide catalyst, rutile iridium oxide, alpha catalyst, and Umicore catalyst prepared by the present invention. And when the current density is 10 mA cm −2 When the overpotential of the 1T phase iridium dioxide catalyst prepared by the present invention is lower than that of rutile iridium oxide, alpha catalyst and Umicore catalyst by 49 mV, 108 mV and 176 mV respectively.

[0055] Table 1: Overpotentials of different catalysts at different currents

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for preparing a 1T phase iridium dioxide catalyst, characterized in that: The steps include: dissolving an iridium source material in a first liquid to generate a first solution; adding a crystal phase conversion agent to the first solution to generate a second solution; subjecting the second solution to ultrasonic and / or stirring reaction for a certain period of time to generate a third solution; adding a co-oxidant to the third solution to generate a fourth solution, and drying the fourth solution for a certain period of time to obtain a 1T phase iridium dioxide precursor powder; performing high temperature oxidation on the 1T phase iridium dioxide precursor powder to obtain an initial catalyst; The initial catalyst is filtered, washed, and dried to obtain a 1T phase iridium dioxide catalyst.

2. The method for preparing a 1T phase iridium dioxide catalyst according to claim 1, characterized in that: The iridium source material includes: any one of K2IrCl6, H2IrCl6, IrCl3, IrCl4, IrO2, K3IrCl6, IrCl3, or a mixture of at least two of the materials.

3. The method for preparing a 1T phase iridium dioxide catalyst according to claim 2, characterized in that: The crystal phase conversion agent includes nitrogen-containing compounds and heterocyclic compounds.

4. The method for preparing a 1T phase iridium dioxide catalyst according to claim 3, characterized in that: The co-oxidant includes a metal nitrate.

5. The method for preparing a 1T phase iridium dioxide catalyst according to claim 4, characterized in that: The metal nitrate is a single metal nitrate or a mixture of at least two metal nitrates, and the metal contained in the metal nitrate is one of K, Na, Li, and Cu.

6. The method for preparing a 1T phase iridium dioxide catalyst according to claim 1, characterized in that: The first liquid includes deionized water and / or pure water; the second liquid includes deionized water and / or pure water.

7. The method for preparing a 1T phase iridium dioxide catalyst according to claim 1, characterized in that: The molar ratio of the iridium source material, the crystal phase conversion agent and the co-oxidant is 1:(1-300):(80-120).

8. The method for preparing a 1T phase iridium dioxide catalyst according to claim 1, characterized in that: The step of high-temperature oxidation of the 1T-phase iridium dioxide precursor powder to obtain the initial catalyst includes: placing the 1T-phase iridium dioxide precursor powder in a high-temperature reactor, heating it to 300-800 degrees Celsius at a rate of 1-10 degrees Celsius per minute, and keeping it in air for 0.5-5 hours to obtain the initial catalyst.

9. The method for preparing a 1T phase iridium dioxide catalyst according to claim 1, characterized in that: The step of filtering, washing and drying the initial catalyst to obtain the 1T phase iridium dioxide catalyst includes: filtering, washing and drying the initial catalyst with a second liquid to obtain the 1T phase iridium dioxide catalyst.

10. A 1T phase iridium dioxide catalyst, characterized in that The method is prepared according to any one of claims 1 to 9.

Images