135 results about "Pt nanoparticles" patented technology

The invention discloses design and application of a colorimetric-catalytic signal enhancement combined graphene oxide nano-enzyme rapid pesticide residue detection platform, and belongs to the technical field of immunochromatography detection. Graphene (GO) is used as a substrate, 30 nm Pt nanoparticles are adsorbed on the surface of the substrate to provide a colorimetric signal, and gaps of Pt NPs are filled with 5 nm AuIr nanoparticles to enhance the catalytic performance of the substrate, so that the colorimetric / catalytic dual-signal enhanced nano-enzyme is prepared. The GO (at) Pt30-AuIr nano-enzyme is synergistically assembled with Pt NPs and AuIr NPs by utilizing the large specific surface area, excellent stability and dispersibility of GO, so that the catalytic performance of the system is remarkably improved. The method has the beneficial effects that a GO-Pt30-AuIr-LFA-based detection system can realize high-sensitivity dual detection on heavy metal cadmium ions (Cd < 2 + >) and pesticide residue imidacloprid (IMI) within 20 minutes, and the detection limit reaches the level of pg / mL. The detection method provided by the research shows significant application potential in the aspect of rapid screening of small molecules in a complex matrix, and a new technical approach is provided for food safety monitoring.

The invention discloses a catalyst for a high-temperature proton exchange membrane fuel cell as well as a preparation method and application of the catalyst. The catalyst of the high-temperature proton exchange membrane fuel cell comprises a carbon carrier and Pt nano-particles loaded on the carbon carrier, and at least part of the surface of the Pt nano-particles is coated with manganese dioxide. According to the catalyst of the high-temperature proton exchange membrane fuel cell, the Pt nano-particles are coated with the manganese dioxide, catalytic active sites of the catalyst can be protected after coating, the poisoning effect of phosphoric acid on the catalyst at high temperature is relieved, and the performance of the high-temperature proton fuel cell is improved. In addition, manganese dioxide not only can be used as a protective layer, but also can form a new proton conductor with phosphoric acid, so that a proton transmission channel of the membrane electrode under a high-temperature working condition is improved, and the performance of the high-temperature proton fuel cell is improved.

The invention relates to the field of catalyst material synthesis, and discloses a metal packaged micro-mesoporous hierarchical pore molecular sieve catalyst, a preparation method and application thereof, and a method for synthesizing 1, 3-propylene glycol, the catalyst comprises a molecular sieve seed crystal inner core, an interlayer containing active components, and a molecular sieve shell; wherein the interlayer containing the active component comprises W oxide and Pt nano particles. The catalyst has a stable metal encapsulated micro-mesoporous hierarchical pore structure, has relatively high hydrothermal stability, can maintain the catalytic activity of active components under long-period operation, and is suitable for industrial application.

The invention discloses a Pt-based composite nanoparticle catalyst as well as a preparation method and application thereof, the catalyst comprises a V5O12 carrier and Pt nanoparticles loaded on the carrier, and the V5O12 is of a multi-stage layered nanoflower structure; the catalyst is obtained by in-situ generation of Pt nanoparticles on a V5O12 carrier. According to the catalyst disclosed by the invention, the superfine Pt nano-particles are loaded on the metal oxide V5O12, so that the activity and the stability of the catalyst are improved; in addition, the preparation method is simple to operate and low in cost, and large-scale production can be realized.

The invention belongs to the technical field of nano material heterojunctions, and particularly relates to a Co3O4 / ZnIn2S4 / Pt heterojunction array, a preparation method thereof and a gas sensor. The Co3O4 / ZnIn2S4 / Pt heterojunction solar cell comprises a substrate and a Co3O4 / ZnIn2S4 / Pt heterojunction array which grows on the surface of the substrate in situ, and the Co3O4 / ZnIn2S4 / Pt heterojunction array is composed of a Co3O4 nanowire, a ZnIn2S4 nanosheet and Pt nanoparticles. The Co3O4 / ZnIn2S4 / Pt heterojunction array is formed by a Co3O4 nanowire, a ZnIn2S4 nanosheet and Pt nanoparticles. The Co3O4 / ZnIn2S4 / Pt heterojunction array disclosed by the invention has good heterogeneous interface contact, and an efficient multi-interface charge transfer characteristic is realized. Due to abundant S vacancy active sites on the surface of ZnIn2S4 and the chemical sensitization effect of Pt nanoparticles, the adsorption activity of the heterojunction array to molecules is enhanced. The Co3O4 / ZnIn2S4 / Pt heterojunction array can be applied to gas sensing, and high-selectivity detection of triethylamine at the temperature of 200 DEG C is realized.

The invention discloses a method for synthesizing a platinum-based nitrogen-doped graphdiyne catalyst based on an atomic layer deposition technology and application of the platinum-based nitrogen-doped graphdiyne catalyst. Firstly, hexabromobenzene and calcium carbide are subjected to vacuum ball milling, calcination and purification to obtain a graphdiyne carrier, then the graphdiyne carrier and melamine are mixed and calcined to achieve nitrogen doping of the carrier, and then loading of platinum nanoparticles is accurately controlled through an atomic layer deposition technology. According to the method, the characteristics of an atomic layer deposition technology are utilized, deposition parameters and the number of cycles are controlled, uniform distribution and size control of Pt nano-particles on porous graphdiyne are achieved, and a nitrogen-doped graphdiyne carrier and the platinum nano-particles have a synergistic effect. The platinum-based nitrogen-doped graphdiyne catalyst prepared by the invention has the specific surface area of 734.8 m < 2 > g < 1 > and the average pore size of 8.68 nm, and shows excellent electrocatalytic activity and dynamic performance in reaction.

The invention provides a bismuth-based heterogeneous material for promoting healing of diabetic wounds and a preparation method and application thereof. The bismuth-based heterogeneous material comprises a bismuth-based porphyrin metal organic framework, and the surface of the bismuth-based porphyrin metal organic framework is modified with Au-Pt nanoparticles. According to the bismuth-based heterogeneous material disclosed by the invention, microenvironments of bacterial infection, high glucose, active oxygen damage, inflammatory disorder, pH rise and oxygen deficit of diabetic wounds are improved through multiple antibacterial effects and enzyme catalysis effects, so that the healing of the diabetic wounds is promoted.

The invention relates to the field of inorganic functional materials, and particularly discloses a corrosion-resistant layered Pt-C catalyst and a preparation method and application thereof. The nitrogen-doped carbon carrier, the spinel oxide and the Pt nanoparticles are arranged to form a novel corrosion-resistant catalyst, and through the synergistic effect of the spinel oxide AB2O4 and the nitrogen-doped carbon carrier N-Carbon, the electron cloud density on the surface of the carbon carrier is effectively reduced, the carbon corrosion problem of traditional Pt / C under high potential is inhibited, and the carrier stability is remarkably improved; spinel oxide is used as an anchoring point of platinum nanoparticles, the migration energy barrier of the platinum nanoparticles is improved, the platinum utilization rate is improved through an in-situ precipitation process, the comprehensive cost is reduced compared with commercial Pt / C, and due to the fact that the production process is simple and the production period is short, the production cost is reduced. The catalyst shows excellent oxygen reduction reaction catalytic activity and stability in zinc-air cells and fuel cells, the preparation method is simple, special equipment is not needed, and the catalyst has good industrial amplification potential.

The invention relates to the technical field of catalysts, and discloses a catalyst for producing hydrogen by electrolyzing water as well as a preparation method and application of the catalyst. The catalyst contains an active metal element Pt and a carrier WO3 nanorod, the active metal element Pt is dispersed on the carrier WO3 nanorod in the form of nanoparticles; on the basis of the total mass of the catalyst, the content of Pt is 1-10 wt%; the average diameter of Pt nanoparticles in the catalyst is 1-5nm, and the oxygen vacancy content of the catalyst is 12-20%. The catalyst provided by the invention can provide continuous proton transfer and electron transfer channels, the platinum load in a membrane electrode cathode catalyst layer is greatly reduced, the activity of a proton exchange membrane electrolyzed water cathode reaction is remarkably improved under the lower platinum load, the comprehensive efficiency of a proton exchange membrane water electrolyzer is improved, and the efficiency of an electrolyzed water device is improved; the method for preparing the catalyst provided by the invention is simple to operate, environment-friendly, easy to control and large-scale.

The application provides a Pt-based catalyst with (1x2)-(110) surface structure for catalyzing CO oxidation and a preparation method thereof. The preparation method of the catalyst is as follows: an oxide carrier and a platinum source are ground and loaded, and after heat treatment under a specific atmosphere, Pt-carrier powder is obtained; then the Pt-carrier powder is calcined with a mixed gas of CO and O2 at a certain temperature for a certain time, so that a Pt-based catalyst with Pt surface with (1x2) structure for catalyzing CO oxidation is prepared in situ. The Pt-based catalyst has the following characteristics: the (1x2) structure of the (110) surface of Pt nanoparticles changes the gas adsorption behavior, and establishes double active sites respectively beneficial to adsorption of O2 and desorption of CO, so that the problem of 'CO poisoning' in the Pt catalytic reaction can be significantly relieved during catalytic oxidation of CO. Compared with other catalysts with other structures, the Pt-based catalyst with the (1x2) special structure has more excellent CO catalytic oxidation activity, and has more practical application value.

Disclosed herein is a method for producing a platinum (Pt) decorated single-layer transition metal dichalcogenide (TMD) composite. The method includes steps of, (a) mixing single-layer TMD nanosheets with a reducing agent, K2PtCl4, and water to form a mixture, wherein the reducing agent and the K2PtCl4 are present in a molar ratio of 3:2 in the mixture; and (b) irradiating the mixture of step (a) for about 0.1-2 hrs to allow the growth of Pt nanoparticles on the single-layer TMD nanosheets thereby forming the Pt decorated single-layer TMD composite. Also disclosed herein is a method of producing hydrogen from an aqueous solution. The method includes electrolyzing the aqueous solution in an electrochemical cell characterizing in having an electrode made from the present Pt decorated single-layer TMD composite.

This invention relates to the field of ceramic materials and their preparation technology, and particularly to a Pt-doped perovskite ceramic composite material, its preparation method, and its application. The Pt-doped perovskite ceramic composite material provided by this invention uses platinum (Pt) as the dopant phase, and combines a sol-gel assisted doping method with a two-step sintering process using solid-state methods to uniformly distribute Pt in nanoparticle form on Sm... 0.5 Sr 0.5 The ZrO3 ceramic grain boundary region (forming a grain boundary nano-Pt phase) enhances near-infrared reflectivity and reduces thermal radiation absorption while maintaining the stability of the main phase lattice. This invention reduces the thermal conductivity of the ceramic composite material while improving its high-temperature stability through the interfacial regulation effect of the grain boundary nano-Pt phase. This invention also significantly improves the toughness and crack resistance of Pt-doped perovskite ceramic composite materials by constructing Pt nanoparticles to "pinneck" cracks at the ceramic grain boundaries, thus overcoming the intrinsic brittleness of ceramic materials.

The present invention discloses a metal oxide-modified Pt / SiC catalyst, its preparation method, and application. The effects of different metal oxides and their contents on the catalyst activity are explored. By modifying the catalyst with metal oxides, the basic sites on the catalyst are increased, allowing Pt nanoparticles to be stabilized and highly dispersed on the SiC surface. Furthermore, the oxide modification enhances surface hydrogen overflow, increasing the active hydrogen concentration on the carrier surface and enabling selective hydrogenation of cinnamaldehyde at low Pt loading. Using oxide-modified SiC as a carrier allows for highly selective hydrogenation of cinnamaldehyde under mild conditions.

The application relates to a preparation method and application of a supported platinum-rhodium-copper core-shell nanometer alloy electrocatalyst. The preparation method comprises the following steps: mixing raw materials containing a platinum source, a copper source and a rhodium source, a surfactant and an oleylamine solvent to obtain a mixed solution; the mixed solution is heated to 160-280 DEG C and reacts for 0.5-8 h, and then is cooled; the cooled reaction solution is washed with acetic acid and centrifuged at a speed of not less than 8000 r / min; a product, namely platinum-rhodium-copper alloy nanoparticles, which does not contain the surfactant on the surface, is obtained; the amount of the acetic acid is not less than the volume of the reaction solution; the obtained product and the platinum source are put into the oleylamine solvent, mixed, heated, reacted, cooled and centrifuged to obtain PtRhCu@Pt nanoparticles; the PtRhCu@Pt nanoparticles are mixed with a carbon carrier to obtain a PtRhCu@Pt catalyst. The catalyst prepared by the preparation method has high coating degree of the platinum shell layer on the surface and uniform particle size.

The invention provides a molecularly imprinted material PtCo-MIP for kynurenine detection, a preparation method, application and a product, and belongs to the technical field of analytical chemistry. According to the invention, PtCo alloy is combined with a molecular imprinting technology; wherein the PtCo alloy has more excellent oxidase-like activity compared with Pt nanoparticles, and the molecular imprinting technology solves the problem of insufficient specific detection of a target factor by nano-enzyme by forming a cavity complementary with a kynurenine structure on the surface of the PtCo alloy, so that efficient and safe kynurenine specific recognition is realized, and the detection sensitivity is improved. And the blank of low-cost and high-specificity detection technology in objective diagnosis of depression is filled. The kynurenine detection kit has an extremely wide detection range on kynurenine, and the detection range and the sensitivity are far better than those of an existing commercial kit; meanwhile, the anti-interference capability is excellent, accurate detection can be performed even in a complex matrix, the detection performance is excellent, and an accurate biological basis is provided for early diagnosis of depression.

The purpose of this invention is to provide a composite particle that singly blocks both ultraviolet light and infrared light at the same time, has good dispersibility and photothermal effect, and is highly safe. The present invention relates to a long ellipsoid-shaped composite particle comprising a Au nanorod, a Pt nanoparticle coating layer containing Pt nanoparticles provided on the surface of the Au nanorod, and a Au nanooutermost layer provided on the surface of the Pt nanoparticle coating layer.

The invention provides a propane dehydrogenation catalyst and a preparation method thereof, and relates to the technical field of petrochemical engineering catalysts. The raw materials of the propane dehydrogenation catalyst comprise a carrier, an active component and an auxiliary active component, the carrier is a spherical silicon-aluminum composite carrier prepared by taking an SUZ-4-AlPO4-11 composite molecular sieve as a raw material; the active component is Pt; the auxiliary active component comprises Pt nano particles, an auxiliary active component and a surfactant. The specific carrier, the auxiliary active component and the active component Pt interact with each other, and the propylene conversion rate, the propylene selectivity and the propylene yield of the propane dehydrogenation catalyst prepared by the specific preparation method are remarkably improved.

This invention discloses a Pt / O-NCP catalyst and its preparation method. It utilizes self-developed nanoporous carbon (NCP) as a support, which is modified to change the internal pores from a hydrophobic to a hydrophilic state. A special preparation method is then used to obtain the noble metal catalyst Pt / O-NCP. During catalyst loading, most Pt nanoparticles are located within the mesopores of the support, maximizing the direct contact between the polymer and Pt (sulfonic acid poisoning). This solves the problems in existing catalysts where Pt nanoparticles are prone to dissolution and carbon corrosion under voltage fluctuations, leading to Pt growth and aggregation, thus avoiding the reduction in catalytic performance caused by a decrease in the active surface area of ​​the catalyst. Furthermore, this catalyst can also address the significant decrease in overpotential of ordinary carbon support materials under low humidity, resolving the typical performance degradation of PEMFCs under low humidity conditions.

To provide a material exhibiting high blood retention capability, allowing temporal observation, having excretability from the body, and offering high biocompatibility.SOLUTION: A surface-modified metal-containing silica particle is characterized by containing, inside the particle, a plurality of biocompatible molecule-modified metal nanoparticles in which Au nanoparticles or Pt nanoparticles are surface-modified with a biocompatible molecule having a thiol group and an amino group and / or a carboxyl group, and is characterized in that polyethylene glycol chains are present on the particle surface.SELECTED DRAWING: Figure 6

The present invention discloses a molecular sieve catalyst double-modified with a multi-metal oxide and platinum nanoparticles, and a preparation method and application thereof. The molecular sieve catalyst comprises FeCoO x -modified molecular sieve support and noble metal platinum nanoparticles uniformly embedded in the surface defect sites of the molecular sieve support; FeCoO x In the FeCoO x -modified molecular sieve support, Fe and Co are uniformly distributed in the pores of the molecular sieve support in the form of an oxide with an equal atomic ratio, and the Pt nanoparticles are embedded in the surface defect sites of the molecular sieve support and form a Schottky heterojunction structure with FeCoO. The Pt in the catalyst of the present invention has high activity and high selectivity for the hydrogenation of halogenated nitrobenzene to halogenated aniline under the action of Fe and Co promoters. At the same time, the preparation of the catalyst in the present invention innovatively uses a one-step instantaneous in-situ reduction method, which is simple and easy to operate, and provides a new idea for the catalyst design of a class of reactions for the highly selective preparation of corresponding halogenated anilines from halogenated nitrobenzenes.

The application discloses a hollow spherical composite catalyst Pt / MnO2 / MnCo2O4, wherein the MnCo2O4 is a hollow sphere with a spinel structure composed of manganese and cobalt double transition metal oxides, the diameter of the hollow sphere is distributed in 1-2 mu m, and the hollow sphere has a porous structure with many cavities in the inside. MnO2 nanosheet microspheres are uniformly attached to the MnCo2O4, and the diameter of the MnO2 nanosheet microspheres is 95-105 nm. Pt nanoparticles with a particle size of 2-20 nm are uniformly loaded on the MnCo2O4 and the MnO2. The Pt / MnO2 / MnCo2O4 is synthesized by a solvothermal method and calcination in an air bath to synthesize a hollow spherical MnCo2O4 carrier, and then the MnO2 and the Pt nanoparticles are loaded on the surface of the MnCo2O4 by a deposition-precipitation method and an in-situ reduction method. The hollow spherical composite catalyst can catalyze degradation of tetracycline in polluted water at room temperature, and the catalytic efficiency can still be maintained after repeated use.

The present invention relates to the field of photoelectrochemical water splitting for hydrogen production. Disclosed is a silver bismuth sulfide (AgBiS2)-based composite photocathode used for photoelectrochemical water splitting for hydrogen production and a preparation method therefor. The composite photocathode structurally comprises a molybdenum-plated conductive substrate located at the bottom, an AgBiS2 light absorption layer located above the conductive substrate, a CdS buffer layer located above the light absorption layer, a TiO2 protective layer located above the buffer layer, and a Pt hydrogen evolution cocatalyst layer located above the protective layer. The preparation method therefor comprises the following steps: using a spray pyrolysis method to spray on a molybdenum-plated substrate an AgBiS2 layer; then, using a chemical bath deposition method to deposit on the AgBiS2 layer a CdS layer; then, using an atomic layer deposition method to deposit on the CdS layer a TiO2 layer; and finally, using a photo-assisted electrodeposition method to deposit on the TiO2 layer a layer of Pt nanoparticles. The AgBiS2-based photocathode disclosed in the present invention can implement at certain bias voltages efficient and stable photoelectrochemical water splitting for hydrogen production, and the preparation method therefor is simple and low-cost.

This invention discloses a platinum-tungsten carbide-graphene layered cathode hydrogen evolution catalyst, its preparation method, and its application, belonging to the field of proton exchange membrane electrolysis for hydrogen production. The catalyst has a layered structure, formed by graphene, a tungsten carbide layer grown in situ on the graphene surface, and noble metal nanoparticles. The graphene forms a two-dimensional conductive network, the tungsten carbide layer is the intermediate layer, and the noble metal nanoparticles are the active centers; wherein the noble metal nanoparticles are Pt nanoparticles, Ru nanoparticles, or Ir nanoparticles. By utilizing the high-speed electron channel provided by graphene, the tungsten carbide layer as the electronic regulation and physical anchoring layer for the noble metal, and the noble metal nanoparticles as the final active centers, the three work synergistically to achieve high activity, high stability, and low noble metal usage.

The present invention belongs to the field of hydrogen energy technology, and discloses a Pt / C catalyst with ultra-low Pt loading and a preparation method thereof. The method comprises the following steps: adding a Pt precursor solution to an electrolyte solution to obtain a mixed solution, introducing an inert gas into the mixed solution, adding a carbon-based carrier, and treating the mixed solution with a double pulse electrochemical deposition method using a three-electrode system. After the deposition is completed, the carbon-based carrier is taken out, rinsed, and dried to obtain a Pt / C catalyst with ultra-low Pt loading; the carbon carrier is connected to a working electrode, the counter electrode is a Pt sheet, and the reference electrode is Ag / AgCl; the concentration of the Pt precursor in the mixed solution is 1 to 10 mmol / L. The size of the Pt nanoparticles prepared by the present invention is between 1nm-3nm, and is mainly distributed at the edge of the graphite layer and the defect position on the graphite layer. The prepared catalyst has a high active specific surface area, and is a highly active ultra-low Pt loading catalyst.

The invention discloses a method for regulating and controlling hydrogenation selectivity of styrene by double-metal doping, which comprises the following steps: by taking MOF-808 as a model, synthesizing Pt nanoparticles in situ in a pore channel of the MOF-808 as an active center for hydrogenation of phenylacetylene, and replacing a part of Zr clusters of the MOF-808 with two different metals by a two-step microwave method to realize double-metal doping. The activity and the selectivity of phenylacetylene hydrogenation reaction are regulated and controlled under the conditions of normal temperature and normal pressure by adjusting the category and the proportion of bimetal, and finally high-activity conversion of phenylacetylene and high-selectivity product distribution of styrene are realized.

This paper discloses a 3d transition metal M-rare earth metal R bicomponent carbon-supported Pt catalyst, its preparation method, and its application. It relates to the catalyst supported on carbon doped with Pt, its preparation method, and its application. This catalyst aims to address the poor catalytic activity and stability of existing Pt / C catalysts. The catalyst consists of Pt nanoparticles supported on an M-R bicomponent carbon support, where M is Fe, Co, Ni, or Zn, and R is Ce, Nd, or Gd. Preparation method: M and R ions are complexed with a nitrogen source ligand on a carbon surface and then carbonized at high temperature to obtain the M-R bicomponent carbon support. Then, Pt is loaded using a microwave reduction method to obtain the M-R bicomponent carbon-supported Pt catalyst. The mass activities of Pt / Fe-Ce-NC and Pt / Co-Ce-NC are 0.27 and 0.22 A / mg, respectively. Pt It is 2.8 and 2.3 times that of Pt / C, and can be used in the field of proton exchange membrane fuel cells.

The invention belongs to the technical field of biological detection, and discloses a rapid immunochromatography detection kit for gastrointestinal pathogenic bacteria based on a viral nano-enzyme probe. The invention discloses a nano-enzyme probe, the virus-shaped nano-enzyme probe provided by the invention takes Fe3O4 nano-particles as a core, Pt nano-particles and Au (at) Pt nano-particles are coated in sequence, a specific antibody is modified, and the nano-enzyme probe has a magnetic enrichment effect and a multi-catalytic-site characteristic at the same time; rapid capture and high-sensitivity quantitative detection of various gastrointestinal pathogenic bacteria in complex matrixes (river water samples, lake water samples and excrement samples) can be realized, and matrix interference in practical application is eliminated; and the kit has huge potential in the aspects of high-sensitivity field screening and clinical monitoring of infection of gastrointestinal bacteria (such as escherichia coli, salmonella and helicobacter pylori).

The invention relates to a green catalysis method for preparing propyl cyclohexane through hydrodeoxygenation reaction of 4-propyl guaiacol, in particular to a method for preparing propyl cyclohexane through one-pot reduction of sodium lignin sulfonate in a water phase and catalysis of complete hydrodeoxygenation reaction of 4-propyl guaiacol through stable Pt nanoparticles. Belongs to the technical field of catalytic preparation of biomass-based high-value chemicals. According to the method, the derivatization product sodium lignin sulfonate of the byproduct black liquor in the papermaking industry is used as a reducing agent and a stabilizing agent, chloroplatinic acid is subjected to in-situ reduction in a water phase and generated metal Pt nano particles are stabilized under the condition that no other auxiliary reagents are needed, and a clean water-phase catalytic system is obtained; and the catalyst is directly used for the hydrodeoxygenation reaction of 4-propyl guaiacol to prepare the propyl cyclohexane. The method provided by the invention has the characteristics of simple preparation of a catalytic system, high activity, mild reaction conditions and the like, and provides a simple and green new way for preparing the saturated cyclic hydrocarbon by taking the lignin platform compound as a raw material through complete hydrodeoxygenation.

The application belongs to the field of batteries, and particularly relates to a Pt / S-TiO 2‑x @Ti self-supporting electrode and a preparation method thereof, nitrate electroreduction ammonia production application and Zn-NO3 ‑ Battery; the Pt / S-TiO 2‑x @Ti self-supporting electrode comprises a titanium substrate, an oxygen-defect titania array in-situ grown on the surface of the titanium substrate, and Pt nanoparticles and S atoms doped in the oxygen-defect titania array; wherein the oxygen defects and the S atoms construct a blocked Lewis acid-base pair; the Pt nanoparticles mediate the formation of a reverse hydrogen overflow channel. The electrode disclosed by the application can have excellent NO3 ‑ RR activity and selectivity, in addition, the material can effectively adapt to the characteristics of the Zn-NO3 ‑ Battery, and can exhibit excellent electrochemical performance.