175 results about "Active phase" patented technology

The invention discloses an impregnation liquid for preparing hydrogenated bisphenol A through bisphenol A hydrogenation. The impregnation liquid comprises a Ru complex, a water-soluble nonionic surfactant and water, wherein the molecular size of the Ru complex is greater than 1nm. According to the preparation method disclosed by the invention, by adopting the impregnation liquid containing the Ru complex of which the molecular size is greater than 1nm and the water-soluble nonionic surfactant, more Ru complex of which the molecular size is greater than 1nm can exist in mesoporous channels of an activated carbon carrier in an impregnation process, so that the contact probability of an active phase and a reactant bisphenol A molecule is increased; the purposes of improving the active metal utilization rate and improving the catalyst activity are achieved.

The invention discloses a preparation method of a Sn-Bi-Ni-Cu quaternary liquid alloy methane cracking catalyst, production raw materials comprise composite melt metal and composite transition metal, and the mass ratio of the composite melt metal to the composite transition metal is 1: (0.3-1.2); the composite melt metal is composed of Sn and Bi according to the mass ratio of 1: (1.3-1.7); the composite transition metal is composed of Ni and Cu according to the mass ratio of 1: 0.15-1.2. The quaternary liquid alloy catalyst has the advantages that: 1) compared with the existing catalyst for hydrogen production by methane cracking, the quaternary liquid alloy catalyst provided by the invention can stably operate for more than 1000 hours in a range of normal pressure to 3MPa and air speed of 100-100mL. G <-1 >. H <-1 >, the active phase retention rate is more than 95%, and the quaternary liquid alloy catalyst is especially suitable for alkane pyrolysis hydrogen production, CO2 hydrogenation and easy carbon deposition reaction systems, and has a wide application prospect; a new material design thought and an engineering implementation scheme are provided for the field of liquid metal high-temperature catalysis; and 2) experiments show that the quaternary liquid alloy catalyst prepared by the method provided by the invention can significantly improve the carbon sequestration rate and the hydrogen yield.

The invention provides a loess-based hydrogen sulfide adsorbent, a preparation method thereof and application of the loess-based hydrogen sulfide adsorbent in removal of hydrogen sulfide in natural gas. Loess with a specific substance content is taken as a raw material, the material is prepared through pretreatment, modification activation and extrusion molding, and modification activation comprises alkali activation, graphene oxide crosslinking and copper and zinc loading. According to the invention, specific loess is combined with a targeted modification and activation process, so that the porosity and the specific surface area are effectively improved, and a new active phase is formed and endowed with adsorption and catalytic oxidation effects. The prepared adsorbent has the remarkable advantages of low cost, high sulfur capacity, long penetration time, excellent regeneration performance and the like. In a medium-low-temperature dry desulfurization scene, HS (the concentration is reduced to 0.1 ppm or below) in natural gas can be efficiently removed, and the device is particularly suitable for small and medium-sized natural gas purification devices in various process scenes such as a fixed bed and a moving bed, and can also be expanded to various fields such as coal chemical industry, petrochemical industry, biogas purification, environmental protection and the like.

The invention relates to the technical field of zinc-air batteries, in particular to a preparation method of a NH4Cl auxiliary modified flexible carbon nanotube film loaded nano FeNi particle catalyst, which comprises the following steps: introducing FeNi nanoparticles on an SWCNT film, nitriding by ammonia gas, and decomposing NH4Cl in high-temperature vacuum to generate NH3 and HCl to realize particle in-situ refinement and heterostructure construction. And the FeNi3N / FeNiN active phase with high density and small size is formed. The obtained integrated flexible catalyst has excellent ORR / OER bifunctional activity, the ORR half-wave potential in 0.1 M KOH reaches 0.82 V, the OER overpotential is only 190 mV, and the integrated flexible catalyst has excellent mechanical flexibility and cycling stability and can be directly used as a self-supporting electrode for a high-performance flexible zinc-air battery to promote development of wearable energy devices.

The present disclosure relates to a nanostructured coating for controlled biocidal and self-cleaning functions. It is disclosed a nanostructured coating for controlled biocidal and self-cleaning functions, comprising: an adhesion layer deposited on a substrate; a transition layer deposited on the adhesion layer; and a top layer comprising a passive matrix phase and a biocidal active phase; wherein the transition layer promotes mechanical compatibility between the adhesion layer and the top layer bounding the layers; wherein the coating is configured to electrochemically release biocidal species in response to an applied electrical potential, while maintaining corrosion resistance and mechanical hardness; and wherein the coating is electrochemically reversible, such that the biocidal release is controllable and stoppable by adjusting or reversing an electrical potential.

The present invention relates to a catalyst comprising a ruthenium oxocarbonate, its preparation method, and its use for the hydrogenation of CO2 to form methane at temperatures below 200°C.

This invention discloses a deep defluorination agent and its application method, specifically relating to the field of defluorination agents (GMS-FS series products). It includes a valence-state switching active phase, a reaction interface building component, a dynamic electronic regulation component, and a structure adjustment and protection component. The valence-state switching active phase provides a reversible valence-state transition reaction center, achieving specific capture of fluoride ions through an electron trapping effect when interacting with them. The reaction interface building component forms a polar gradient interface layer on the surface of the defluorination agent, guiding fluoride ions to migrate towards the active center and locally enrich them, thereby improving defluorination efficiency. By constructing a rare metal valence-state switching active phase with La2O3 and UO2 as its core, combined with a polar gradient interface guiding layer and a dynamic electronic regulation mechanism, preferential migration and specific capture of fluoride ions are induced in a multi-ion coexistence environment, achieving stable deep defluorination under high salinity and highly competitive ion conditions.

The invention discloses an electrode material which is simple in preparation method, high in performance and capable of stably producing hydrogen by electrolyzing water, and also discloses a preparation method of a photocatalyst for purifying wastewater by using a derivative of the electrode material. The preparation method of the electrocatalyst mainly comprises the following steps: etching a nickel metal substrate by using diluted hydrochloric acid; the preparation method comprises the following steps: preparing a first-stage product, dissolving the first-stage product with a bismuth source and molybdate in a reaction kettle, carrying out hydrothermal synthesis to obtain a hydrothermal product, carrying out high-temperature calcination on the obtained material to obtain a sample precursor and a part of byproducts, finally repeating the reaction once to obtain a high-activity electrode and related byproduct derivatives, mixing the two byproducts, carrying out high-temperature calcination, and grinding to obtain a second-stage product. According to the prepared catalyst, a bismuth source is introduced to serve as an additive, a NiMoO4 / Fe2 (MoO4) 3 composite film layer active phase is constructed on an NF substrate through a one-step hydrothermal-corrosion-growth method, the active phase and an NF framework are induced through a confinement effect to form strong interface bonding, the electron transfer rate is increased, and the electrode performance is remarkably improved by reducing the valence band position of the active phase. The preparation process is simple to operate, the morphology of the catalyst is controllable, and derived by-products generate higher economic benefits.

This application discloses a method and its application for in-situ construction of hierarchical porous photocatalytic foam ceramics based on the pyrolysis of carbonates and / or oxalates. This method introduces a full spectrum of carbonate and / or oxalate precursors, including alkaline earth metals, transition metals, rare earth elements, and bismuth-based precursors, into an organic foam impregnation system. Combined with a gradient heat treatment process, during sintering, the following are simultaneously achieved: in-situ pyrolysis of the precursors to generate a highly dispersed metal oxide photocatalytic active phase; synergistic construction of micro- and macro-hierarchical channels through gas release and template decomposition; and in-situ construction of photocatalytic heterostructures based on a combination of metal cations. The resulting material possesses a three-dimensional interconnected pore structure, excellent mechanical stability, and broad-spectrum photocatalytic activity, enabling efficient degradation of recalcitrant emerging pollutants in water, such as antibiotics, perfluorinated compounds, and bisphenol A. This provides a structure-function integrated material solution for the engineering application of photocatalysis technology in environmental remediation.

The present application relates to the field of catalyst preparation, and discloses a vanadium phosphorus oxygen catalyst, a preparation method and application thereof, wherein the content of pyrophosphoric vanadyl oxide phase in the crystal phase structure of the vanadium phosphorus oxygen catalyst is 80-99.9wt%. The vanadium phosphorus oxygen catalyst provided by the present application has high active phase content, large specific surface area and large average pore size, and has good catalytic performance in the reaction of preparing maleic anhydride from n-butane oxidation, and can significantly improve the conversion rate of n-butane and the yield of maleic anhydride.

This invention discloses a highly active oil-soluble molybdenum-based catalyst, its preparation method, and its application in the catalytic hydrocracking and upgrading of heavy and inferior oils, belonging to the field of chemical catalyst technology. The highly active oil-soluble molybdenum-based catalyst is prepared by the following method: a long-chain fatty acid ester is mixed with a polyol amine, then an alkaline ionic liquid is added, and the reaction is stirred under a nitrogen atmosphere; after the reaction is complete, the mixture is allowed to stand and separate into layers, and the upper layer of reaction product is taken to obtain a polyol amine ester; the polyol amine ester is mixed with a molybdenum source, and the reaction is stirred under a nitrogen atmosphere to obtain the highly active oil-soluble molybdenum-based catalyst. The oil-soluble molybdenum-based catalyst has good oil solubility, can dissolve and disperse in feedstock oil, and has high activity, capable of decomposing at low temperatures to generate an active phase. It exhibits excellent hydrogenation catalytic activity in the slurry-bed hydrogenation process of heavy and inferior oils, thus demonstrating good application prospects and value in the field of chemical catalysis technology.

This invention discloses a method for preparing a biomass gasification adsorption-enhanced reforming hydrogen production catalyst, belonging to the fields of catalyst preparation and biomass thermal conversion technology. The catalyst of this invention uses CeO2 as a high-content support and Ni and Fe as active components. The method employs a co-impregnation method to simultaneously load a nickel active phase precursor and an iron co-catalytic precursor onto the support surface; after drying, the precursor powder is placed under an inert atmosphere and processed according to the following relationship... T ×0.01+ t By calcining at a temperature T of 10°C with a time t in a complementary correlation, a composite catalytic system with strong interactions is constructed. This invention also provides the application of the above catalyst in combination with a calcium-based adsorbent in biomass adsorption-enhanced reforming for hydrogen production. This invention enhances the catalyst's resistance to carbon deposition by regulating the bimetallic electronic structure and the oxygen storage and release capacity of the support. Simultaneously, by combining a segmented temperature control process, it achieves kinetic synergy between in-situ CO2 capture and catalytic reforming, significantly increasing the green hydrogen content in the syngas.

This invention relates to the field of catalyst preparation technology, specifically disclosing a microwave-absorbing carbon-coated Fe2N catalyst, its preparation method, and its application in Fischer-Tropsch synthesis. The catalyst provided by this invention uses Fe2N particles with microwave-absorbing properties as the core, coated with an outer carbon shell, forming an Fe2N@C core-shell composite structure. The carbon coating layer can, to a certain extent, inhibit the agglomeration and sintering of Fe2N particles, improve the structural stability of the catalyst, and regulate its surface properties and active phase evolution behavior. Furthermore, the Fe2N@C composite material can absorb electromagnetic waves and convert them into heat energy, providing a material basis for heating and energy utilization in microwave-assisted Fischer-Tropsch synthesis. The preparation method of this invention is simple, and the resulting catalyst possesses both electromagnetic wave absorption and Fischer-Tropsch synthesis catalytic functions, providing a new material system for the functional design of iron-based catalysts and their application in microwave-enhanced Fischer-Tropsch synthesis.

The invention discloses a hierarchical confinement catalytic material and a preparation method and application thereof.The catalytic material comprises a spatial confinement unit and a crystal face confinement unit located in the spatial confinement unit, the spatial confinement unit is a shell or a three-dimensional framework composed of silicon dioxide (SiO2), one or more containing cavities used for confining reactants are formed in the spatial confinement unit, and the crystal face confinement unit is located in the shell or the three-dimensional framework. And the crystal face constraint unit is a metal oxide active phase. Regulating and controlling the reaction temperature, time and pH value and a surfactant to synthesize metal oxide active phase crystal grains through a hydrothermal method or a solvothermal method; a metal oxide active phase crystal grain is used as a core, a Stber method, a sol-gel method or a microemulsion method is adopted, a silicon dioxide layer is formed on the surface of the metal oxide active phase crystal grain by controlling the concentration and hydrolysis time of a silicon source, and a stable confinement structure with a nano cavity is formed through drying. The material can efficiently remove chloralkane organic pollutants in a water phase, realizes regeneration through simple solvent cleaning or light calcination, is easy to recover and can be repeatedly used.

This invention belongs to the field of catalytic chemical technology, disclosing an HZSM-5 molecular sieve-based hydrocracking catalyst, its preparation method, and its applications. The catalyst prepared by this invention uses HZSM-5 molecular sieve as the support and non-noble metal Ni as the active phase. Different carbon sources are doped to prepare Ni / HZSM-5 catalysts with varying carbon doping, among which the CA-Ni / HZSM-5 catalyst prepared using citric acid as the carbon source exhibits the best performance. The catalyst prepared by this invention has low loading, high dispersion, and small Ni particle size. The catalyst maintains stable activity after five cycles. The catalyst described in this invention exhibits high catalytic activity in the LDPE hydrocracking reaction to produce C3 gas.

The invention discloses a hydrogenation catalyst and a preparation method thereof, the hydrogenation catalyst comprises a carrier and an active component, the active component is loaded on the carrier, and the active component comprises oxides of VIB group and / or VIII group metals; the carrier comprises aluminum oxide; wherein after the hydrogenation catalyst is vulcanized, the active component at the pore channel inlet of the hydrogenation catalyst mainly exists in a multi-layer active phase crystal form, and the active component in the pore channel mainly exists in a single-layer active phase crystal form. The high-activity multi-layer active phase crystal near the inlet of the catalyst pore channel is used for pretreating impurity compounds difficult to crack, so that the impurity compounds are broken into small molecules and enter the pore channel to be in contact with the single-layer active phase crystal with mild activity, and impurities are further removed, so that too fast generation of carbon deposition is avoided, the pore channel smoothness is improved, and the catalytic activity of the catalyst is improved. And the desulfurization and carbon residue removal activity and activity stability of the catalyst are improved.

The invention provides an arsenic adsorbent as well as a preparation method and application thereof, the arsenic adsorbent takes nano gamma-Al2O3 as a carrier, and an iron-copper sulfide active phase with an Fe-Cu-S electron-rich interface is loaded on the surface of the carrier. The preparation method of the arsenic adsorbent comprises the following steps: dispersing an iron source, a copper source and nano gamma-Al2O3 in a solvent, and then sequentially carrying out ultrasonic treatment and drying treatment to obtain a precursor; and mixing the precursor with a sulfur source, and calcining to obtain the arsenic adsorbent. The adsorbent has high adsorption capacity and wide temperature range adaptability to trivalent arsenic and pentavalent arsenic in flue gas, has stable and even promoted performance in an SO2-containing atmosphere, and can convert gaseous arsenic into a stable crystal phase for fixation.

The invention belongs to the technical field of electro-catalysis and functional materials, and relates to a high-temperature stable non-iridium nickel-based catalyst and a preparation method thereof. According to the catalyst, a nickel-cobalt layered double hydroxide compound which is subjected to in-situ ionic liquid template induced self-confinement reconstruction modification is used as a main active phase, 2, 4-dihydroxy-N-trifluoromethyl phenylacetamide is introduced as an organic synergistic small molecule, and a conductive skeleton is jointly constructed by matching a carbon carrier, a reducing agent and a stabilizing aid. The ionic liquid forms a dynamic template in the reaction, and self-confinement reconstruction and electron distribution regulation of a lattice structure are realized, so that the composite material with the hierarchical pore structure and the N-doped carbon coating layer is obtained. The catalyst has excellent high-temperature structural stability and electron conduction performance, and shows low oxygen evolution overpotential, high specific surface area and good electrochemical cycle stability in an alkaline medium. According to the invention, synergistic improvement of structural stability, conductivity and catalytic activity is realized through an in-situ reconstruction mechanism induced by an ionic liquid template.

The application discloses a high-activity alkaline hydrogen evolution electrocatalyst with boride as a medium and a preparation method and application thereof. The electrocatalyst is composed of a metal active phase, a metal oxide active phase, a boron oxide base phase and a carrier, the metal active phase is dispersedly distributed on the surfaces of the metal oxide active phase and the boron oxide base phase, the metal oxide active phase and the boron oxide base phase are mixedly distributed, and both are loaded on the carrier. In the high-temperature heat treatment process, the metal generated by the reduction reaction is combined with the original metal oxide to construct a synergistic catalytic active site; more high-conductivity metals are generated in situ after the heat treatment, thereby ensuring the high conductivity of the catalyst; the construction of the three-dimensional nano structure and a large number of nanopores caused by dehydration of boric acid in the heat treatment process provide more active sites and further improve the mass transfer performance of the catalyst. The catalytic performance of the electrocatalyst is superior to that of a noble metal Pt catalyst, and the electrocatalyst has excellent stability.

This invention provides a method for extracting lithium and rubidium from lithium using a composite salt at low temperature and its application, belonging to the field of valuable metal extraction technology. The method uses spodumene as raw material, adding a composite salt system composed of K₂CO₃, KOH, and Ca(OH)₂, and calcining it at low temperature. This disrupts the spodumene crystal structure, transforming it into an easily leached active phase. The calcined product is then subjected to water leaching, achieving synergistic and efficient leaching of lithium and rubidium. Compared with existing technologies, this invention features a lower calcination temperature and higher lithium and rubidium leaching rates (>90%). Furthermore, the water leaching method is less corrosive and introduces fewer impurities compared to acid leaching systems, facilitating selective leaching of lithium and rubidium and simplifying subsequent separation and purification processes, demonstrating promising industrial application prospects.

Catalyst comprising an active phase comprising copper and a Group IIIA element and an alumina support, the copper content being between 0.5 and 25 wt%, based on copper element, relative to the total weight of the catalyst, the atomic ratio of copper to Group IIIA element being between 1 and 50 mol / mol, characterized in that the support is provided in the form of beads or extrudate having a specific surface area between 10 and 250 m2 / g.

The application discloses a phosphide nanometer array catalyst for seawater hydrogen evolution and a preparation method and application thereof. The catalyst takes foamed nickel as a carrier to provide support and conductive effect for the catalyst; the catalyst is composed of a composite material of nickel, molybdenum, phosphorus and cobalt, and a nanorod array structure of the catalyst main body is formed on the base. The cobalt-doped nickel molybdenum phosphide nanorod array catalyst provides high active sites, the phosphide layer is in-situ oxidized into an active phase of Ni(OH)2 to accelerate reaction kinetics, and granular phosphide (P-Metal bond) on the surface of the nanorod blocks Cl ‑ erosion, and a three-dimensional porous structure promotes bubble detachment to resist seawater corrosion; the catalyst can simultaneously serve as a cathode (HER) and an anode (OER) to realize dual-function integration, realizes full-hydrolysis voltage ≤1.60 V (10 mA cm ‑2 ) in 1 M KOH solution, and stably operates for ≥88 h (current density attenuation rate ≤10%) under a cell voltage of 1.90 V.

This invention belongs to the field of catalytic chemical technology and discloses a method for preparing a Ni2P / SAPO-11 catalyst and its application. Ni(NO3)2·6H2O and (NH4)2HPO4 are dissolved in deionized water to obtain a mixed solution A. Citric acid is dissolved in mixed solution A and ultrasonically treated until completely dissolved to obtain an impregnation solution B. Impregnation solution B is added dropwise to a SAPO-11 support, and after aging, drying, and calcination, a catalyst precursor is obtained. The precursor is reduced under a hydrogen atmosphere to prepare the active phase, thus obtaining a CA-modified CA(x)-Ni2P / SAPO-11 catalyst, where x is the CA / Ni molar ratio. This invention, by regulating the metal-acid active center balance with citric acid, promotes the synergistic effect of bifunctional active centers, significantly improving the catalyst's ability to simultaneously perform hydrodesulfurization and hydroxyl skeletal isomerization. This invention provides a new method for preparing bifunctional catalysts with deep desulfurization and olefin skeletal isomerization activities.

This invention belongs to the field of biomedicine and biomaterials technology, specifically a spatiotemporally controlled release microsphere of human knee joint stem cell exosomes and its preparation method. The microsphere comprises a responsive functional shell, a bioactive anchoring core, and loaded exosomes. The shell is made of a smart polymer with mechanical relaxation properties. Non-covalent bonds are formed between the functional groups and the exosomes to constrain them. The preparation process includes exosome stabilization, core phase construction, shell composite emulsification and solidification. In application, it is based on a stress-off-resting-on mechanism. During the active phase, a barrier is built to prevent burst release, and during the resting phase, a mesh opening is used to achieve long-term uniform delivery. This application solves the problem of scale escape and repair rhythm mismatch, and significantly improves the utilization rate of bioactive factors.

The application discloses a fluorine-doped and heterojunction synergistically modified hydrogen evolution electrocatalyst, which is composed of a fluorine-doped double transition metal phosphide heterojunction active phase and a carrier, the fluorine-doped double transition metal phosphide heterojunction active phase is in a relatively rough nanowire structure, and the nanowire is attached to the carrier; the double transition metal phosphide in the double transition metal phosphide heterojunction is Ni2P and CoP, and the two phases constitute the heterojunction. The fluorine-doped and heterojunction synergistically modified hydrogen evolution electrocatalyst has high intrinsic activity, good conductivity and excellent stability, can stably and efficiently catalyze the water electrolysis hydrogen evolution reaction under a full pH condition, has excellent stability and durability, and the comprehensive catalytic performance is close to that of a noble metal Pt / C catalyst.

A solid catalyst for heterogeneous catalysis, said catalyst being non-supported or supported and, in the latter, comprising an active phase dispersed on the surface of a catalyst support, said solid catalyst being characterized in that it comprises a thin graphitic carbon structure, preferably forming a layer, the thin graphitic carbon structure includes from about 1 to about 300 graphene layers, preferably from about 1 to about 150 graphene layers.

The application provides a method for synthesizing ethanol and liquid hydrocarbon by CO2 hydrogenation and an iron-based catalyst thereof, and the method comprises the following steps: taking carbon dioxide and hydrogen as raw materials, and under the conditions of 250-330 DEG C, 3-5 MPa and the presence of a catalyst, ethanol and liquid hydrocarbon are generated by reaction; the catalyst is a supported iron-based catalyst, the active phase composition of the catalyst comprises Fe, Fe3O4, Fe7C3 and Fe5C2, the liquid hydrocarbon is a hydrocarbon with carbon number greater than or equal to 5, and the volume ratio of the carbon dioxide to the hydrogen is 1:2-1:5. Based on the single system iron-based catalyst, the carbon dioxide can be converted into high value-added ethanol and liquid hydrocarbon products by one-step hydrogenation, the CO2 conversion rate is greater than 40%, the total selectivity of ethanol+liquid hydrocarbon is greater than 50%, and the selectivity of CO by-product is less than 10%.

The invention discloses a perovskite precursor solution, a perovskite active layer prepared from the perovskite precursor solution and application of the perovskite active layer. The perovskite precursor solution contains a mixture of formamidine thiocyanate (FASCN) and rubidium thiocyanate (RbSCN). According to the invention, the mixed additives formamidine thiocyanate FASCN and rubidium thiocyanate RbSCN are added into the precursor solution to effectively promote phase transformation from an inactive phase delta to an active phase alpha, so that the efficiency and the stability of the methylamine-free perovskite battery are remarkably improved, and the methylamine-free perovskite battery has a relatively good commercial application prospect.

This utility model relates to the field of missile aerodynamics and structural technology, and in particular to a missile wing deployment device. It includes a wing housing, with adapter shafts rotatably connected to both sides of the wing housing. Each adapter shaft has a wing deployment rocker arm, and each wing deployment rocker arm has a folding wing on the side closest to the wing housing. A servo motor is located under the adapter shaft. It is mainly used for the rapid deployment of missile wings, folding them when the missile is in a negative phase of flight and deploying them when it is in an active phase, fully utilizing the advantages of the wings. In the deployed state, the missile's aerodynamic shape changes significantly, and its flight trajectory deviates considerably, making it harder for air defense systems to predict and intercept during penetration.

The application discloses a Ni-based catalyst, a preparation method and application of the Ni-based catalyst in methanol electrochemical oxidation reaction, and particularly provides a preparation method of Ni5(II)O(OH)8, realizes artificial synthesis of Ni5(II)O(OH)8 for the first time, and the Ni5(II)O(OH)8 is used as a main active phase of methanol electrochemical oxidation; the unique crystal structure of the Ni5(II)O(OH)8 makes the Ni5(II)O(OH)8 have significantly enhanced intrinsic oxidation resistance after being coupled with FeOOH, and effectively inhibits irreversible conversion of Ni(II) to high-valence Ni species such as NiOOH at an oxidation potential. The application further provides a Ni5(II)O(OH)8 / FeOOH catalyst with a core-shell heterostructure, and an interface structure with a crystal lattice matching relationship is formed between the Ni5(II)O(OH)8 and the FeOOH. When the Ni5(II)O(OH)8 and the Ni5(II)O(OH)8 / FeOOH are applied to methanol electrochemical oxidation reaction for preparing formate, compared with a traditional nickel-based catalyst, the Ni5(II)O(OH)8 and the Ni5(II)O(OH)8 / FeOOH have a lower current response starting potential and a higher current density at the same potential. The application provides a new type of high-stability electrocatalyst for methanol electrochemical oxidation for preparing formate.