A high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst, a preparation method and application thereof

Abstract

The application discloses a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst, a preparation method and application thereof, and belongs to the technical field of electrochemical catalysis. The preparation method comprises the following steps: mixing noble metal oxides and transition metal carbonyl compounds, and then performing heat treatment under an inert atmosphere at 100-400 DEG C to obtain the cluster heterostructure oxygen evolution reaction electrocatalyst; wherein the noble metal oxides comprise one of iridium dioxide or ruthenium dioxide, two kinds of materials or a solid solution material of the two. The preparation method is simple, easy to control and easy to scale, and the cluster heterostructure oxygen evolution reaction electrocatalyst prepared by the method has excellent catalytic activity and stability, and is low in cost, and can be applied to the field of electrochemical energy conversion, for example, as an electrocatalyst for hydrogen production by electrolysis of water in a proton exchange membrane.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrochemical catalysis, and particularly relates to a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst, a preparation method and application thereof. BACKGROUND

[0002] The information disclosed in the background of the present application is only intended to increase the understanding of the overall background of the present application and should not necessarily be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art.

[0003] Proton exchange membrane water electrolysis (PEMWE) is a key hydrogen production technology supporting global energy transformation. Compared with traditional alkaline electrolysis cells, PEMWE has achieved a revolutionary breakthrough with the help of perfluorosulfonic acid proton membranes: the current density has been increased to 6 A / cm 2 (15 times that of alkaline technology), the dynamic response is millisecond level, the equipment volume is reduced by 80%, and it perfectly adapts to the fluctuation characteristics of wind and solar power. However, the strong oxidation and strong acid working environment generated by the anode end oxygen evolution reaction brings great challenges to the stability of the electrocatalyst. The commonly used oxygen evolution reaction electrocatalyst mainly focuses on iridium, ruthenium-based noble metal materials. Iridium, ruthenium and other elements have very low content in the earth's crust, resulting in high cost of hydrogen production, and there is an urgent need to reduce the cost of catalyst noble metal. The traditional modification strategy of oxygen evolution catalytic material mainly focuses on the ways of heteroatom doping, alloying, and constructing hetero-loaded interfaces. The above strategies can effectively improve the catalytic activity, but it is difficult to greatly improve the stability, and the catalyst still has the problem of rapid deactivation. Therefore, how to provide an oxygen evolution reaction electrocatalyst with high catalytic activity and high stability and low cost is a problem to be solved. SUMMARY

[0004] Therefore, the present application provides a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst, a preparation method and application thereof. The oxygen evolution reaction electrocatalyst provided by the present application has a large number of hetero-cluster interface regulated metal sites and active oxygen redox characteristics, and the interface multi-site cooperatively catalyzes the multi-step proton-coupled electron transfer (PCET) process, effectively optimizes the water oxidation reaction path, greatly improves the oxygen evolution reaction catalytic activity, and significantly reduces the kinetics of noble metal oxide dissolution at high potential.

[0005] In a first aspect, the present application provides a preparation method of a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst, comprising the following steps:

[0006] The noble metal oxide is mixed with the transition metal carbonyl compound, and then heat treatment is performed under an inert atmosphere at 100-400 DEG C to obtain the product.

[0007] In a second aspect, the application provides a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst prepared by the above method.

[0008] In a third aspect, the application provides an application of the high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst in the field of electrochemical energy conversion.

[0009] Compared with the prior art, the application has the following beneficial effects:

[0010] (1) The preparation method of the application utilizes lower-cost transition metals to form a cluster heterostructure with noble metal oxides, which helps to reduce costs, and the preparation method is simple and easy to control, and easy to scale up.

[0011] (2) The application can obtain a high-density transition metal-noble metal oxide cluster heterostructure, and the high-density hetero-cluster interface can not only maximize the number of active sites, but more importantly, can optimize the adsorption behavior of the catalytic site and the key oxygen evolution reaction intermediate, break the inherent linear adsorption relationship of the oxygen intermediate species, and significantly improve the activity.

[0012] (3) In the oxygen evolution reaction electrocatalyst of the application, the strong coupling of the hetero-cluster interaction effectively regulates the redox properties of the active site, significantly reduces the dissolution kinetics process of the noble metal site, optimizes the reaction path of water oxidation, avoids the participation of lattice oxygen, and maintains the stability of the crystal structure.

[0013] (4) In the oxygen evolution reaction electrocatalyst of the application, the transition metal nanocluster can act as a Lewis acid site, can promote the enrichment of interfacial water molecules on the surface of the catalyst, and can act as a proton acceptor, significantly accelerating the proton-coupled electron transfer process. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of the application form a part thereof, serve to provide further understanding of the application, and together with the exemplary embodiments of the application described herein and the explanations thereof serve to explain the application, and do not constitute an improper limitation of the application. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0015] Figure 1 MoOx X-ray diffraction pattern of IrO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst;

[0016] Figure 2 MoO2dioxide cluster oxygen evolution reaction electrocatalyst of Example 1 of the present invention x High resolution transmission electron microscopy image of IrO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst;

[0017] Figure 3 MoO2dioxide cluster oxygen evolution reaction electrocatalyst of Example 1 of the present invention x Ir 4f X-ray photoelectron spectroscopy comparison chart of IrO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst and IrO2oxygen evolution reaction electrocatalyst of Comparative Example 1;

[0018] Figure 4 MoO2dioxide cluster oxygen evolution reaction electrocatalyst of Example 1 of the present invention x Linear sweep voltammetry comparison curve (a) and Tafel comparison curve (b) of IrO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst and IrO2oxygen evolution reaction electrocatalyst of Comparative Example 1;

[0019] Figure 5 MoO2dioxide cluster oxygen evolution reaction electrocatalyst of Example 1 of the present invention x Multi-step chronoamperometry comparison chart of IrO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst and IrO2oxygen evolution reaction electrocatalyst of Comparative Example 1;

[0020] Figure 6 MoO2dioxide cluster oxygen evolution reaction electrocatalyst of Example 1 of the present invention x Chronoamperometry curve of IrO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst (@10 mA / cm 2 );

[0021] Figure 7 MoO2dioxide cluster oxygen evolution reaction electrocatalyst of Example 1 of the present invention x Chronoamperometry curve of IrO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst (@100 mA / cm 2 );

[0022] Figure 8 MoO2dioxide cluster oxygen evolution reaction electrocatalyst of Example 2 of the present invention x Linear sweep voltammetry comparison curve of RuO2dioxygen-oxidized cluster oxygen evolution reaction electrocatalyst and RuO2oxygen evolution reaction electrocatalyst of Comparative Example 2. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed description is merely exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0024] The application provides a preparation method of a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst.

[0025] The noble metal oxide and the transition metal carbonyl compound are mixed, and then heat treatment is performed under an inert atmosphere at 100-400 DEG C to obtain the product.

[0026] The failure mechanism of noble metal oxides such as ruthenium dioxide and iridium dioxide under acidic oxygen evolution reaction conditions mainly includes the following reasons: ① under a high oxidation potential (>1.8V), the metal is oxidized into soluble high-valence metal ions, which causes a large amount of active atom dissolution and failure; ② electrophilic lattice oxygen participates in the water oxidation process, thereby generating a large amount of oxygen defects, which further causes the collapse of the crystal structure. This situation is particularly obvious in the ruthenium-based catalytic system. The electrocatalyst obtained by the above preparation method has a large number of hetero-cluster interface adjustment metal sites and active oxygen redox characteristics, and the interface multi-site synergistically catalyzes the multi-step proton-electron coupling transfer (PCET) process, effectively optimizes the water oxidation reaction path, greatly improves the oxygen evolution reaction catalytic activity, and significantly reduces the kinetics of the dissolution of the noble metal oxide under a high potential.

[0027] In the above preparation method, the noble metal oxide and the transition metal carbonyl compound are mixed and heat treated, wherein the transition metal carbonyl compound loses CO molecules during pyrolysis and releases metal atoms (such as Mo, W, Cr, etc., similar to chemical vapor deposition), the noble metal oxide serves as a stable substrate, provides nucleation sites, induces the heterogeneous growth of the transition metal oxide on its surface, and inhibits the migration and agglomeration of the transition metal oxide, thereby forming a clear, high-density, and strongly coupled hetero-cluster interface.

[0028] In the application, the transition metal carbonyl compound is selected from one or more of Mo(CO)6, W(CO)6, Cr(CO)6, V(CO)6, Ni(CO)4, Mn2(CO) 10 , Fe3(CO) 12 , Re2(CO) 10 , or Co4(CO) 12 .

[0029] In the application, the molar ratio of the noble metal oxide to the transition metal carbonyl compound is (0.2-5):1, and more preferably (0.5-2):1.

[0030] The present application further comprises a step of grinding the mixture of the noble metal oxide and the transition metal carbonyl compound after the step of mixing the noble metal oxide and the transition metal carbonyl compound, the grinding method including but not limited to manual grinding and mechanical grinding, preferably, manual grinding is used, and the grinding time is 0.5-4h.

[0031] In the present application, the inert atmosphere comprises one or more of argon, helium or nitrogen. In one or more embodiments of the present application, the inert atmosphere is selected from argon.

[0032] In the present application, the heat treatment time is 0.5-5h, more preferably 1-3h. The heat treatment temperature in the present application is more preferably 150-300℃, further preferably 180-250℃.

[0033] In the present application, the noble metal oxide is not limited by the preparation method, and the specific preparation method includes high-temperature pyrolysis, sol-gel method, hydrothermal method or chemical precipitation method, etc., preferably high-temperature pyrolysis. Further, the preparation method of the noble metal oxide is as follows: mixing iridium salt or ruthenium salt with sodium nitrate in a solvent, evaporating the solvent, calcining under air atmosphere, then sequentially performing acid washing and water washing, and obtaining the product. The present application does not specially limit the reaction parameters and solvents in the preparation process, and the reaction parameters and solvents commonly used in the art can be used.

[0034] The present application further provides a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst prepared by the above preparation method; the size of the noble metal oxide cluster is 1-3nm, and the size of the transition metal oxide cluster is 0.5-2nm.

[0035] The electrocatalyst of the present application has a high density of hetero-cluster interfaces, which maximizes the number of interface active sites, and can also optimize the adsorption behavior of the catalytic site and the key oxygen evolution reaction intermediate, break the inherent linear adsorption relationship of the oxygen intermediate species, and significantly improve the activity. The strong coupling of the hetero-cluster interaction effectively regulates the redox properties of the active site, significantly reduces the dissolution kinetics process of the noble metal site, optimizes the reaction path of water oxidation, avoids the participation of lattice oxygen, and maintains the stability of the crystal structure. The transition metal nanocluster can act as a Lewis acid site, can promote the enrichment of water molecules on the surface of the catalyst, and can act as a proton acceptor, significantly accelerating the proton coupling-transfer process.

[0036] The present application further provides an application of the above high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst in the field of electrochemical energy conversion, including but not limited to proton exchange membrane electrolysis of water to produce hydrogen, carbon dioxide reduction, NO x reduction, etc.

[0037] The technical solutions of the present application are further described below in combination with specific examples. The reagents used in the following examples are not particularly limited and commercially available products known to those skilled in the art can be used.

[0038] Example 1

[0039] This example provides a MoO x -IrO2 double oxide cluster electrocatalyst, and the preparation method specifically comprises:

[0040] (1) 20 mg of IrCl3 hydrate and 1 g of NaNO3 are dispersed in a mixed solvent of ethanol and water in a volume ratio of 3:1, and ultrasonic treatment is performed for 1 h, and then the mixed solid is obtained by stirring and drying in a water bath at 60°C.

[0041] (2) The mixed solid obtained in step (1) is heated to 350°C under an air atmosphere, and after being kept for 2 h, it is naturally cooled to room temperature.

[0042] (3) The above product is washed with hydrochloric acid, water and ethanol in sequence to obtain a porous IrO2 nanocluster material with a three-dimensional network structure.

[0043] (4) 20 mg of IrO2 and 20 mg of Mo(CO)6 (molar ratio of 1.18:1) are uniformly mixed, and after being ground for 0.5 h, they are placed in a tube furnace and kept at 200°C under an Ar atmosphere for 2 h, and then naturally cooled to room temperature to obtain the MoO x -IrO2 double oxide cluster oxygen evolution reaction electrocatalyst.

[0044] This example provides XRD characterization of the obtained MoO x -IrO2 double oxide cluster oxygen evolution reaction electrocatalyst, as shown in Figure 1 . The MoO x -IrO2 catalyst only detects the diffraction peaks of IrO2, and there is no diffraction peak related to MoO x . This indicates that MoO x is uniformly dispersed on the porous IrO2 nanoparticles. As shown in Figure 2 , the sizes of the MoO x and IrO2 clusters are about 2 nm, and a high-density hetero-cluster interface is formed. Figure 3 X-ray photoelectron spectroscopy in x indicates that there is strong interface electron transfer between MoO

[0045] Example 2

[0046] This example provides a MoO x -RuO2 double oxide cluster electrocatalyst, and the preparation method specifically comprises:

[0047] (1) 20 mg RuCl3 hydrate and 0.8 g NaNO3 were dispersed in a mixed solvent of ethanol and water with a volume ratio of 3:1, and ultrasonic treatment was performed for 1 h, and then the mixed solid was obtained by stirring at 60°C in a water bath.

[0048] (2) The mixed solid obtained in step (1) was heated to 450°C under an air atmosphere, and after being kept for 2 h, it was naturally cooled to room temperature.

[0049] (3) After the above product was washed with hydrochloric acid, water and ethanol in sequence, a porous RuO2 nanocluster material with a three-dimensional network structure was obtained.

[0050] (4) 20 mg of RuO2 was uniformly mixed with 20 mg of Mo(CO)6 (molar ratio of 1.98:1), and after grinding for 0.5 h, it was placed in a tube furnace and kept at 200°C under an Ar atmosphere for 2 h, and then naturally cooled to room temperature to obtain the MoO x -RuO2 double oxide cluster electrocatalyst for oxygen evolution reaction.

[0051] Example 3

[0052] This example provides a WO x -IrO2 double oxide cluster electrocatalyst, and the preparation method specifically comprises:

[0053] (1) 20 mg of IrCl3 hydrate and 1 g of NaNO3 were dispersed in a mixed solvent of ethanol and water with a volume ratio of 3:1, and ultrasonic treatment was performed for 1 h, and then the mixed solid was obtained by stirring at 60°C in a water bath.

[0054] (2) The mixed solid obtained in step (1) was heated to 350°C under an air atmosphere, and after being kept for 2 h, it was naturally cooled to room temperature.

[0055] (3) After the above product was washed with hydrochloric acid, water and ethanol in sequence, a porous IrO2 nanocluster material with a three-dimensional network structure was obtained.

[0056] (4) 20 mg of IrO2 was uniformly mixed with 30 mg of W(CO)6 (molar ratio of 1.05:1), and after grinding for 1 h, it was placed in a tube furnace and kept at 180°C under an Ar atmosphere for 2 h, and then naturally cooled to room temperature to obtain the WO x -IrO2 double oxide cluster electrocatalyst for oxygen evolution reaction.

[0057] Example 4

[0058] This example provides a CrO x -IrO2 double oxide cluster electrocatalyst, and the preparation method specifically comprises:

[0059] (1) 20 mg IrCl3 hydrate and 1 g NaNO3 were dispersed in a mixed solvent of ethanol and water with a volume ratio of 3:1, and ultrasonic treatment was performed for 1 h, and then the mixture was stirred and dried in a water bath at 60°C to obtain a mixed solid.

[0060] (2) The mixed solid obtained in step (1) was heated to 350°C under an air atmosphere, and then naturally cooled to room temperature after being kept for 2 h.

[0061] (3) The product was washed with hydrochloric acid, water and ethanol in sequence to obtain a porous IrO2 nanocluster material with a three-dimensional network structure.

[0062] (4) 20 mg of IrO2 was uniformly mixed with 15 mg of Cr(CO)6 (molar ratio of 1.3:1), and then ground for 1 h, and then placed in a tube furnace and kept at 250°C under an Ar atmosphere for 2 h, and then naturally cooled to room temperature to obtain the CrO x -IrO2 double oxide cluster oxygen evolution reaction electrocatalyst.

[0063] Example 5

[0064] This example provides a MoO x -RuIrO x double oxide cluster electrocatalyst, and the preparation method specifically comprises:

[0065] (1) 10 mg of RuCl3, 10 mg of IrCl3 hydrate and 1 g of NaNO3 were dispersed in a mixed solvent of ethanol and water with a volume ratio of 3:1, and ultrasonic treatment was performed for 1 h, and then the mixture was stirred and dried in a water bath at 60°C to obtain a mixed solid.

[0066] (2) The mixed solid obtained in step (1) was heated to 350°C under an air atmosphere, and then naturally cooled to room temperature after being kept for 4 h.

[0067] (3) The product was washed with hydrochloric acid, water and ethanol in sequence to obtain a porous RuIrO x nanocluster material with a three-dimensional network structure.

[0068] (4) 20 mg of RuIrO x was uniformly mixed with 15 mg of Mo(CO)6 (molar ratio of 1.6:1), and then ground for 1 h, and then placed in a tube furnace and kept at 200°C under an Ar atmosphere for 2 h, and then naturally cooled to room temperature to obtain the MoO x -RuIrO x double oxide cluster oxygen evolution reaction electrocatalyst.

[0069] Comparative Example 1

[0070] The comparative example uses the porous IrO2 nanocluster material with a three-dimensional network structure in step (3) of Example 1 as an electrocatalyst for oxygen evolution reaction.

[0071] Comparative Example 2

[0072] The comparative example uses the porous IrO2 nanocluster material with a three-dimensional network structure in step (3) of Example 2 as an electrocatalyst for oxygen evolution reaction.

[0073] Comparative Example 3

[0074] The comparative example differs from Example 1 in that the Mo(CO)6 precursor is replaced by Na2MoO4·2H2O in step (4) to obtain a supported MoO x / IrO2 electrocatalyst with large size, low interface density and weak interaction.

[0075] Comparative Example 4

[0076] The comparative example differs from Example 1 in that the heat treatment temperature in step (4) is 800°C to obtain a Mo-IrO2 electrocatalyst for oxygen evolution reaction without hetero-interface structure.

[0077] Test Example

[0078] The electrocatalysts for oxygen evolution reaction in Examples 1-2 and Comparative Examples 1-4 are subjected to electrochemical oxygen evolution reaction test.

[0079] The specific steps are as follows:

[0080] Before the electrochemical oxygen evolution reaction test, the glassy carbon electrode is polished with 50 nm alumina powder, and then cleaned with ethanol and water to obtain a clean surface. 5 mg of the electrocatalyst for oxygen evolution reaction prepared in the above examples and comparative examples is added to a mixed solution of 490 mL of isopropanol and 10 μL of 5 wt% Nafion, and ultrasonically dispersed for 1 h to obtain a uniform slurry. 10 μL of the slurry is dropped onto the surface of a glassy carbon electrode with a diameter of 5 mm. After the slurry is dried, a working electrode with a loading of 0.5 mg / cm 2 is obtained. A platinum sheet electrode is selected as the counter electrode, a Hg / Hg2SO4 electrode is selected as the reference electrode, and a 0.5 mol / L sulfuric acid solution is used as the electrolyte. A rotating disk motor is used, the working electrode rotates at 1600 rpm, and the linear polarization curve of the oxygen evolution reaction is obtained at a scan rate of 5 mV / s.

[0081] The overpotential of the MoO x -IrO2 double oxide cluster electrocatalyst in Example 1 at a working current density of 10 mA / cm 2 is 207 mV, and the Tafel slope is 64 mV / dec, as shown in Figure 4As shown. The operating current density in the three-electrode electrolytic cell was recorded using an electrochemical workstation at 10, 50, 100, 200, and 500 mA / cm². 2 When working continuously for 100 seconds, the change in working potential is as follows: Figure 5 As shown. MoO x The IrO2 catalyst exhibited excellent catalytic stability at various current densities. The long-term stability of the catalyst was further evaluated using chronopotentialography (CP). Figure 6 and Figure 7 The display shows that MoO x -IrO2 catalyst at 10 mA / cm 2 and 100mA / cm 2 It can operate stably for 600h and 500h at current densities, respectively, with decay rates of only 0.07mV / h and 0.21mV / h.

[0082] The electrocatalyst for the oxygen evolution reaction of IrO2 in Comparative Example 1 at 10 mA / cm 2 The overpotential at the operating current density is 271 mV, and the Tafel slope is 72 mV / dec, which is significantly higher than that of MoO in Example 1. x -IrO2. Stability tests show that its catalytic performance decreases significantly when the potential exceeds 1.7V, such as... Figure 5 As shown.

[0083] MoO in Example 2 x -RuO2 dioxide cluster oxygen evolution reaction electrocatalyst at 10 mA / cm 2 The overpotential at the operating current density is 197mV, such as Figure 8 As shown. The RuO2 oxygen evolution reaction electrocatalyst of Comparative Example 2 at 10 mA / cm 2 The overpotential at the operating current density is 221mV, which is higher than that of MoO. x -RuO2.

[0084] Comparative Example 3: Supported MoO x / IrO2 oxygen evolution reaction electrocatalyst at 10mA / cm 2 The overpotential at the operating current density is 317 mV, and the Tafel slope is 83 mV / dec, which is significantly higher than that of MoO in Example 1. x -IrO2.

[0085] Comparative Example 4: Mo-IrO2 electrocatalyst for oxygen evolution reaction without heterogeneous interface structure at 10 mA / cm 2 The overpotential at the operating current density is 355mV, and the Tafel slope is 96mV / dec, which is significantly higher than that of MoO in Example 1. x -IrO2.

[0086] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing a high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst, characterized in that, The method comprises the following steps: The noble metal oxide is mixed with the transition metal carbonyl compound, and then heat treatment is performed under an inert atmosphere at 100-400 DEG C to obtain the noble metal- transition metal oxide cluster heterostructure; wherein the noble metal oxide comprises one of iridium dioxide or ruthenium dioxide, or a solid solution material of the two; The noble metal oxide is prepared by mixing iridium salt or ruthenium salt with sodium nitrate in a solvent, evaporating the solvent, calcining under air atmosphere, and then sequentially performing acid washing and water washing; The transition metal carbonyl compound is selected from any one of Mo(CO)6, W(CO)6 or Cr(CO)6.

2. The production method according to claim 1, wherein The molar ratio of the noble metal oxide to the transition metal carbonyl compound is (0.2-5) :

1.

3. The production method according to claim 1, wherein The inert atmosphere comprises one or more of argon, helium or nitrogen.

4. The production method according to claim 1, wherein The heat treatment is performed for 0.5-5 h.

5. The high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst prepared by the method according to any one of claims 1-4, wherein the transition metal is selected from the group consisting of Fe, Co, Ni, Mn, Cr, V, Ti, Mo, W, and mixtures thereof. The size of the noble metal oxide cluster is 1-3 nm, and the size of the transition metal oxide cluster is 0.5-2 nm.

6. The use of the high-performance transition metal-noble metal oxide cluster heterostructure oxygen evolution reaction electrocatalyst of claim 5 in the field of electrochemical energy conversion.

Images