337 results about "Faraday efficiency" patented technology

The invention provides an industrial electrode for synthesizing urea through electro-catalysis C-N coupling and a preparation method and application of the industrial electrode, and belongs to the field of urea synthesizing.The industrial electrode for synthesizing urea through electro-catalysis C-N coupling comprises a conductive substrate and an electro-catalysis material coating the surface of the conductive substrate; the electrocatalytic material comprises a magnesium oxide modified copper oxide catalyst, and MgO nanoparticles and CuO nanoparticles in the magnesium oxide modified copper oxide catalyst are in contact with each other to form a heterostructure. The magnesium oxide modified copper oxide catalyst is used as an electro-catalysis material, MgO nano-particles and CuO nano-particles in the catalyst material are in contact with each other to form a heterostructure, after MgO is introduced, the CO2 adsorption and activation capacity is improved, CO and NHx coupling is promoted, and the urea Faraday efficiency is improved. The industrial electrode shows excellent selectivity and stability in the process of electro-catalytic synthesis of urea.

The invention relates to a Ni monatomic doped zinc oxide electrocatalyst and application thereof in electrocatalytic synthesis of urea. Ni in the catalyst is anchored to ZnO crystal lattices in a monatomic form to form a Ni-O-Zn atomic-scale interface, Ni-Ni coordination does not exist, and the catalyst is prepared by adopting a hydrothermal method. The catalyst is loaded on a conductive substrate, CO2 and NO3 <-> are synergistically reduced in a CO2 saturated KHCO3 / KNO3 mixed electrolyte to generate urea, the urea yield is 41.38 mmol h <-1 > gcat <-1 > at-0.8 V (vs RHE), and the Faraday efficiency is 31.47%. Compared with Ni nano-particle loaded ZnO and non-doped ZnO, the catalyst has the advantages that the yield and selectivity of urea are remarkably improved, and the catalyst is suitable for efficiently synthesizing urea under mild conditions.

The invention discloses a normal-temperature and normal-pressure optical fiber chemical synthesis method and device. The core is a sandwich type optical fiber chemical membrane electrode (anode / ion exchange membrane / cathode + diffusion layer); the parallel scattering type optical fiber realizes near-uniform illumination and local enhancement on an interface. The anode uses 90-112 nm VUV to promote H dissociation, and the cathode uses 80-100 nm VUV to activate and reduce N; the direct current / pulse of the power supply is programmable. The membrane is PEM / AEM / CEM (5-200m), and an ion channel is functionally optimized through nanofiller, crosslinking and functionalization; and the catalytic surface is loaded with 1-100nm of transition metal compound and anchored. Arranging an inert / reduced-pressure sealed light path to improve VUV coupling; raw material gas H: N = 1: 1-5 (preferably 1: 3), and inert carrier gas can be added. The system is connected to online characterization and AI closed loop, ammonia is continuously produced at 0-40 DEG C and 0.8-1.2 atm, and selectivity and Faraday efficiency are improved.

The invention relates to a preparation method of a novel series heterojunction electrocatalyst for urea synthesis, and belongs to the technical field of production of high value-added chemicals and catalysts. The novel bimetallic oxide series electrocatalyst (CuO / Co3O4) is prepared by taking ZIF-67 as a precursor and combining an ion exchange method with a low-temperature pyrolysis method, and green and energy-saving urea electrosynthesis can be realized through co-reduction of electrocatalytic CO2 and NO3 <->. The CuO / Co3O4 series electrocatalyst is prepared into a cathode, and under the action of specific additional bias voltage, the yield of urea electrocatalytically synthesized by the catalyst within 30 min reaches 14 mmol gcat <-1 > h <-1 >, and the highest Faraday efficiency reaches 61.1%; the stable urea yield, Faraday efficiency and current response can still be kept after six times of cyclic utilization, and a green synthesis route and a sustainable technology are provided for urea electrosynthesis. The method has the characteristics of simplicity, high efficiency and low cost, and can be applied to electro-catalytic synthesis of urea.

The application discloses a preparation method of a molybdenum-nickel hydroxyl oxide catalyst and application thereof, and the preparation method comprises the following steps: firstly, a precursor MoNi LDH material is obtained through a hydrothermal reaction; and then, the MoNi LDH material is electrochemically oxidized to obtain the molybdenum-nickel hydroxyl oxide material; and the electrochemical oxidation time is 10-60 minutes. The molybdenum-nickel hydroxyl oxide material has excellent urea catalytic activity and stability. When the molybdenum-nickel hydroxyl oxide material is applied as an anode catalyst, urea removal and hydrogen peroxide preparation can be realized, the problem of activity reduction caused by the lack of OH- in a traditional electrocatalytic process is solved, the urea removal rate in water can reach 100%, 28 g / L of hydrogen peroxide is obtained at the same time, the Faraday efficiency of H2O2 generation is maintained at 80%-90%, the device can maintain stable urea removal and H2O2 generation performance in a long running time, the activity of the generated H2O2 is high, and the H2O2 can be used for Fenton treatment of sulfamethoxazole pollutants in water, and the removal rate of sulfamethoxazole is more than 90%.

The invention relates to an enzyme-mimic CeO2-based multi-active-site catalyst, a preparation method and application thereof, an electrolytic tank and a battery. CeO2 nanorods are synthesized through hydrothermal and high-temperature pyrolysis methods, and then metal ions are anchored to the surfaces of the CeO2 nanorods through strong interaction of carriers; metal nanoclusters and nanoparticles with specific sizes are synthesized, and then chemical vapor deposition reaction is performed through sodium hypophosphite, so that the bionic nano-enzyme electrocatalyst with multiple active sites is obtained. The multi-active-site catalytic material provided by the invention has high selectivity of ammonia production from nitrate radicals, ammonia production efficiency and Faraday efficiency when being used as a cathode. When the RuO2 is used as an anode, in an alkaline water electrolysis reaction, when the current density is 50 mA / cm < 2 >, the overpotential is 288 mV, which is far better than that of commercial RuO2. Based on excellent oxidation and reduction performance, the zinc nitrate battery has high power density, high ammonia yield and good charge-discharge cycle stability, and nitrate removal, ammonia production and power supply can be achieved at the same time.

The invention discloses a method for synthesizing N, N-dimethylformamide through electrochemical catalytic conversion of dimethylamine. The synthesis method provided by the invention comprises the following steps: by taking dimethylamine as a single substrate, carrying out in-situ electrochemical oxidation reaction to obtain N, N-dimethylformamide; a working electrode used in the in-situ electrochemical oxidation reaction is a composite electrode loaded with a co-oxide Cr2WO6 crystal. According to the synthesis method provided by the invention, only dimethylamine is used as a substrate, and the substrate is few in variety and low in concentration, so that the raw material cost is greatly reduced, and the damage of the high-concentration substrate to a catalyst and reaction equipment is reduced; in addition, the method is high in Faraday efficiency, has important practical application value for efficient resource utilization of dimethylamine, and has far-reaching significance in the aspect of carbon neutralization at present.

The invention relates to the technical field of waste plastic resource utilization, and particularly provides a method for preparing glycollic acid through high-selectivity photoelectrocatalytic oxidation of polyethylene glycol terephthalate (PET) plastic. The core of the method is that a carbon nitride film loaded and modified by heteroatom doping (sulfur / phosphorus and the like) and an oxidation co-catalyst (Ni (OH) 2, NiFeOOH and the like) is used as a photo-anode, and under the conditions of certain bias voltage, electrolyte pH and composition and light source wavelength, PET oxidation is guided to generate glycolic acid with high selectivity. According to the method, efficient conversion from the PET waste plastics to high-value chemicals is achieved, the Faraday efficiency of glycollic acid in the product can reach 75% or above, and an innovative technical path is provided for plastic pollution abatement and waste turning into wealth.

This invention relates to an integrated electrocapture and conversion catalyst, its preparation method, and its application in the electroreduction of flue gas to produce carbon monoxide. The catalyst consists of gold nanoparticles modified with thiadiazole-based organic ligands, including 2-amino-5-mercapto-1,3,4-thiadiazole, 2-mercapto-5-methyl-1,3,4-thiadiazole, or 2,5-mercapto-1,3,4-thiadiazole. This invention provides a method for preparing the aforementioned integrated electrocapture and conversion catalyst. This method features mild preparation conditions, a simple and clear process, and good reproducibility. The thiadiazole-based organic molecular layer captures carbon dioxide in a reduced state, achieving local enrichment of carbon dioxide. The enriched carbon dioxide is further reduced to carbon monoxide by the gold nanoparticles. In flue gas with a 15% carbon dioxide concentration, a carbon monoxide Faraday efficiency of up to 80.4% can be obtained.

The application discloses a kind of molecular sieve supported silver monatomic catalyst and its preparation method and application.The catalyst is with molecular sieve as carrier, by silver precursor salt aqueous solution is impregnated to molecular sieve, after drying and with carbon powder mixing, again be placed in joule heat in-situ heating device, at 600 DEG C~1200 DEG C high temperature pyrolysis 5~8 seconds preparation;Wherein silver element mass content is 0.2 wt%~3 wt%.The catalyst prepared by the application realizes that silver monatomic atom is highly dispersed on molecular sieve, and metal utilization rate reaches 100%.The catalyst is applied to oxalic acid dimethyl ester electrocatalytic reduction coupling preparation tartaric acid dimethyl ester reaction, and excellent catalytic performance is shown: at optimum potential, target product tartaric acid dimethyl ester selectivity is as high as 95.3%, faraday efficiency reaches 82.9%, conversion frequency reaches 1880 h ‑1 , and has excellent long-term electrochemical stability.

The invention discloses a titanium dioxide nanorod / dissimilar metal MOFs heterojunction material and a preparation method and application thereof, and belongs to the technical field of photoelectrochemistry seawater hydrogen production. Soluble nickel salt, soluble cadmium salt or soluble cobalt salt and ammonium molybdate are adopted as metal sources, spherical dissimilar metal MOFs grow on the surface of a TiO2 nanorod in situ, and the TiO2 nanorod / dissimilar metal MOFs heterojunction material is prepared. According to the present invention, the oxygen deficiency-regulated dissimilar metal MOFs material (i.e., the titanium dioxide nanorod / dissimilar metal MOFs heterojunction material) is obtained through subsequent acid etching and annealing treatment, the material is subjected to in-situ reconstruction during the OER process to spontaneously form the active hydroxide (NiOOH) of anion protection (MoO4 < 2->), and the excellent stability is represented; only small Faraday efficiency loss (1.2-2.3%) occurs in a high chloride ion environment (3.5 wt%-7wt% of NaCl), and an extensible path is provided for industrial-scale solar hydrogen production by using seawater.

The invention relates to integrated preparation and synthetic ammonia application of a cobalt-ferroferric oxide / ferrous oxide loaded foam iron self-supporting electrode. The invention relates to a preparation method and application of a cobalt-ferroferric oxide / ferrous oxide loaded foam iron (Co-Fe3O4 / FeO (at) IF) self-supporting electrode with high ammonia yield and Faraday efficiency in the field of nano materials. The invention aims to solve the problems of low electrochemical nitrate reduction synthesis ammonia yield and low Faraday efficiency. The preparation method comprises the following steps: taking cobalt nitrate hexahydrate and 2, 5-dihydroxy terephthalic acid (H4DOBDC) as raw materials, preparing Co-MOF-74 through a one-step hydrothermal reaction, then preparing a Co / Fe-MOF-74 (at) IF precursor material from foam iron (IF), the Co-MOF-74 and the H4DOBDC, and finally, successfully preparing the cobalt-doped self-supporting electrode Co-Fe3O4 / FeO (at) IF with high ammonia yield and Faraday efficiency through tube furnace calcination. The electrode can be directly used as a working electrode for electrocatalytic nitrate reduction synthesis of ammonia.

This invention discloses a barium titanate composite cuprous oxide catalyst, its preparation method, and its application, belonging to the field of catalyst preparation technology. The preparation method of the barium titanate composite cuprous oxide catalyst includes: mixing BaTiO3 and Cu2O cubes at a mass ratio of 1:(0.1~0.4), adding them to an ethanol-water solution for composite formation, followed by filtration, washing, and vacuum drying. The composite catalyst is a heterostructure formed by BaTiO3 nanoparticles attached to the surface of Cu2O cubes. During the electrocatalytic reaction, simultaneous application of ultrasound results in a synergistic effect between the piezoelectric potential generated by BaTiO3 and the catalytic activity of Cu2O, which can efficiently promote nitrate adsorption activation and ammonia generation. Compared with existing technologies, this invention is the first to apply the piezoelectric-electrocatalytic synergistic mechanism to the field of electrocatalytic reduction of nitrogen-containing compounds, achieving an ammonia yield as high as 3370.38 μg·h⁻¹. ‑1 ·mg ‑1 With its excellent performance of 70.54% Faraday efficiency and simple, controllable, and low-cost preparation process, it provides a new route for the green synthesis of ammonia and has important industrial application prospects.

The invention provides a plasmon copper-based nano material, a preparation method thereof and application of the plasmon copper-based nano material in a carbon dioxide capture-conversion system.The preparation method comprises the steps that a copper nanowire modified by polytetrafluoroethylene is adopted as a plasmon catalyst, carbon dioxide is efficiently adsorbed and captured through organic amine, and under excitation of polarized light with the specific wavelength, the carbon dioxide is converted into the plasmon copper-based nano material. And efficient carbon dioxide electroreduction is realized. Compared with the prior art, carbon dioxide capture and photoelectrocatalysis carbon dioxide conversion of the plasmon copper-based nano material are combined, rapid capture and release of carbon dioxide are achieved, and the Faraday efficiency of reducing carbon dioxide into methane reaches up to 90% or above. The invention constructs a carbon dioxide capture-conversion system with industrial application potential, and provides a new path for realizing energy conservation and emission reduction.

The invention discloses a high-load cobalt monatomic catalyst with a three-dimensional confinement structure as well as a preparation method and application of the high-load cobalt monatomic catalyst. A three-dimensional cyclodextrin-based covalent organic framework 3D-CD-COF, which is constructed by seven-(6-amino-6-deoxy)-beta-cyclodextrin (7ACD) and aromatic dicarboxaldehyde (terephthalaldehyde or 4, 4 '-biphenyl dicarboxaldehyde), is used as a carrier, multiple coordination sites are constructed through salicylaldehyde grafting, and high-loading anchoring of cobalt single atoms is realized; cobalt single atoms are uniformly dispersed in a three-dimensional intercommunicated pore channel in a CoN1O3 coordination form, the loading capacity reaches 13.0-14.0%, and a three-dimensional confinement structure can inhibit four-electron oxygen evolution side reaction. The catalyst has high hydrogen peroxide Faraday efficiency and high yield, compared with Co-CD without a three-dimensional confinement structure, the activity and selectivity are remarkably improved, and an efficient technical scheme is provided for electrochemical preparation of hydrogen peroxide.

The application discloses a kind of foam nickel supported copper-cobalt bimetallic composite catalyst and preparation method and application, belong to electrocatalytic material technical field.CuSO4·5H2O, CoSO4·7H2O and C6H5Na3O7 are mixed and using constant voltage deposition method is loaded on foam nickel substrate, and CuCo / NF precursor is obtained, and copper-cobalt bimetallic composite catalyst Cu x O-Co3O4 / NF with excellent catalytic activity and stability is successfully prepared by temperature programmed calcination.The application significantly enhances the adsorption capacity of nitrate molecules on the catalyst surface by utilizing the synergistic effect of Cu and Co, reducing the incidence of side reactions, thereby improving the catalytic efficiency of nitrate reduction reaction.Compared with traditional single catalyst, it shows higher ammonia yield, Faraday efficiency (FE) and better stability, and has broad application prospect.

The application discloses a preparation method of a high-selectivity hydrogen peroxide production catalytic electrode, and the method comprises the following steps: (1) dissolving a soluble copper salt and a soluble zinc salt in water to prepare a mixed precursor solution containing Cu2+ and Zn2+ with different proportions; (2) adding a precipitant solution to the mixed precursor solution obtained in the step (1) under stirring, controlling the pH range of the reaction system, regulating the local coordination environment, the local electronic structure, especially the microenvironment of the lattice hydroxyl of the basic copper carbonate, and making the system generate a zinc-modified basic copper carbonate precipitate through aging crystallization, and then performing solid-liquid separation, washing and drying treatment to obtain a zinc-modified basic copper carbonate material; and (3) dispersing the zinc-modified basic copper carbonate material obtained in the step (2) into a solvent to form a catalyst slurry, and loading the catalyst slurry on the surface of a conductive substrate, and then performing drying to obtain a supported zinc-modified basic copper carbonate catalytic electrode. The reasonable lattice hydroxyl structure of the obtained material can be used for electrochemical oxidation of water to prepare hydrogen peroxide in a sulfate electrolyte system, and the material has good hydrogen peroxide production capacity and faradic efficiency.

The invention belongs to the technical field of photoelectrocatalysis, and particularly relates to a preparation method of a double-confinement hollow photocathode and application of the double-confinement hollow photocathode in synthesis of ammonia from nitrate wastewater through photoelectric reduction. According to the method, based on an ion exchange and in-situ growth strategy, a FeMnO3 / CuFe2O4 / Ti hollow cube integrated photocathode is constructed, hydroxyl functionalized ionic liquid (OH-ILs) is further introduced through vacuum impregnation, and an ILs (at) FeMnO3 / CuFe2O4 / Ti nanoreactor with a dual confinement effect is formed. Under ultraviolet-visible-near infrared (UV-Vis-NIR) illumination, the photocathode can remarkably promote separation of photo-induced electron-hole pairs, the charge transfer efficiency is improved, and high-selectivity and high-efficiency ammonia synthesis is achieved. Experiments show that the photocathode can almost completely convert nitrate in high-concentration nitrate wastewater (50mM) within 2.5 hours, so that the effluent reaches the drinking water standard of the World Health Organization (WHO). In a flowing electrolytic tank, the ammonia yield reaches 20.51 mg h <-1 > cm <-2 >, the Faraday efficiency reaches up to 97.75%, and excellent catalytic performance is shown.

The invention provides a gas diffusion electrode device for electrochemical lithium-mediated ammonia synthesis and an electrochemical ammonia synthesis method, and belongs to the technical field of electrochemical ammonia synthesis. The gas diffusion electrode device comprises a nitrogen runner, a sealing gasket, a working electrode, a catholyte chamber, a diaphragm, an anolyte chamber, an anode catalyst, a hydrogen runner and an electrolyte, the electrolyte comprises a lithium salt, an organic solvent, a proton shuttling agent and an interface additive. According to the invention, high nitrogen transmission is realized by adopting a circulating type gas diffusion electrode device, and a three-phase interface chemical environment of gas, electrolyte and the gas diffusion electrode is regulated and controlled by an interface additive, so that the ammonia production rate and the Faraday efficiency are remarkably improved, and continuous and efficient nitrogen reduction reaction is realized at normal temperature and normal pressure.

The invention discloses a copper-based catalyst rich in Cu < 2 + > / Cu < + > active sites and a preparation method and application thereof.The preparation method comprises the following steps that a copper ion solution and alkali liquor are mixed for reaction, then a reducing agent is added for reduction reaction, and a Cu2O solid material containing Cu < 2 + > is obtained; and carrying out heat treatment on the Cu2O solid material containing Cu < 2 + > in a nitrogen atmosphere to obtain the copper-based catalyst containing Cu < 2 + > / Cu < + > active sites. In the electrochemical reduction process, Cu < 2 + > in the catalyst is reduced to Cu < + >, Cu < + > is reduced to Cu0, CO2 is activated through Cu0, a CO2RR reaction switch is turned on, CO < * > adsorption is enhanced through Cu < + >, C-C coupling is promoted, and the prepared catalyst has high Faraday efficiency and olefin yield.

The invention relates to a Pt-Pd composite electrode and a preparation method and application thereof. The preparation method comprises the following steps: placing a conductive substrate in an electro-deposition liquid, taking the conductive substrate as a working electrode, sequentially carrying out first electro-deposition and second electro-deposition, and forming a Pt-Pd composite catalyst layer on the surface of the conductive substrate to prepare the Pt-Pd composite electrode, the electro-deposition liquid comprises a platinum source, a palladium source and a supporting electrolyte. The Pt-Pd composite electrode is prepared through cooperation of Pt and Pb, the structural stability of the electrode is remarkably improved, meanwhile, layer-by-layer growth of catalytic particles is achieved in the mode that first electrodeposition and second electrodeposition are combined, it is guaranteed that catalytic active sites are fully exposed, it is also guaranteed that the binding force between a plating layer and a substrate is extremely high, and the service life of the plating layer is prolonged. The electrode is used for electrochemically synthesizing ammonia, has relatively high Faraday efficiency, is particularly suitable for long-term operation under high current density, and has a good industrial application prospect.

The invention discloses a new energy electric hydrogen production system optimization scheduling method and device, equipment and a medium, and relates to the field of hydrogen production system optimization. The method comprises the steps that voltage efficiency and Faraday efficiency are considered, and an electrolytic cell efficiency-power characteristic model is established; considering the working state, the shutdown state and the standby state of the electrolytic cell, and establishing an electrolytic cell state conversion model; constructing a target function by taking the minimum operation cost of the new energy electric hydrogen production system as a target, determining constraint conditions based on an electrolytic bath efficiency-power characteristic model and an electrolytic bath state conversion model, and constructing a system optimization scheduling model; solving the system optimization scheduling model to obtain an optimal scheduling result of the current scheduling period; the optimal scheduling result at least comprises the corresponding electrolytic bath operation power and the electrolytic bath start-stop state when the operation cost is minimum. According to the invention, efficient scheduling of electric energy resources in the new energy electric hydrogen production system is realized.

The invention discloses an electrolytic hydrogen production electrochemical synthesis ammonia electrode catalyst and a preparation method thereof, relates to the technical field of electrochemical catalysts, and belongs to the patent classification number C25B1 / 00. Comprising the following steps: preparing graphene quantum dot powder by using a fused salt cutting method; then coating the graphene quantum dots through dopamine auto-polymerization and loading a molybdenum source, and annealing to obtain Mo-NX-coated GQDs powder; then compounding the modified Mo-NX-coated GQDs and TiCTXMXene colloid, performing vacuum filtration, depositing on carbon paper, and annealing to form a support film; and finally, performing CFplasma treatment to form a hydrophobic layer, and spin-coating perfluorinated sulfonic acid resin on the side of the carbon paper to obtain the electrode catalyst. According to the method, an efficient active center is constructed, electron / ion transmission is optimized, a three-phase interface is regulated and controlled, the ammonia yield and the Faraday efficiency are remarkably improved, and the method is suitable for a normal-temperature and normal-pressure electrochemical ammonia synthesis technology.

A method for preparing a NiCo-MOF anodic oxidation catalyst for matching cathode CO2 reduction is disclosed, belonging to the technical fields of electrocatalysis and fine chemical synthesis. Based on ion etching in a hydrothermal environment, a NiCo-MOF electrocatalyst with a uniform nanoflower-like structure was grown on the surface of substrates such as nickel foam. Benefiting from the modulating effect of cobalt on the electron cloud distribution of the active center nickel, this catalyst exhibits excellent catalytic activity for glycerol oxidation and glucose oxidation, achieving up to 400 mA cm⁻¹ at only 1.398 V. ‑2 The industrial-grade current density has a Tafel slope of only 42.3 mV dec. ‑1 The catalyst exhibited no performance degradation after 100 hours of stable cycling, with a Faradaic efficiency exceeding 90% for the main product, formic acid. This catalyst demonstrates a simple synthesis method, low cost, good catalytic activity and selectivity, and excellent stability, showing promising industrial application prospects in the co-production of formate using small-molecule electro-oxidation coupled with carbon dioxide electroreduction.

The invention discloses a phosphorized cobalt vanadate catalyst for electrosynthesis of urea and a preparation method of the phosphorized cobalt vanadate catalyst, and belongs to the technical field of electrocatalysis. The problems of low Faraday efficiency and yield in the existing electro-catalytic urea synthesis reaction process are solved. The bimetallic catalyst P-CoVO-NF for synthesizing urea through efficient electro-catalysis of co-reduction of nitrate and carbon dioxide is constructed by taking Co and V as bimetallic active sites, and the bimetallic catalyst is of a nanosheet structure, uniform in element distribution, good in stability and excellent in charge transfer capacity. And when nitrate is subjected to electro-catalysis reduction, excellent Faraday efficiency and yield are shown. A test result shows that the urea yield of the P-CoVO-NF catalyst reaches up to 124.9 umol.h <-1 >. Cm <-2 > in a mixed solution of KNO3 and KHCO3 at-0.6 V vs.RHE, and the urea yield is kept stable after 10 cycle periods.

The invention discloses a superfine medium-entropy nanoparticle catalyst for electrochemical oxidation of ethylene glycol and other micromolecules as well as a preparation method and application of the superfine medium-entropy nanoparticle catalyst. The catalyst comprises a superfine medium-entropy nano-particle metal material and a conductive substrate material, the superfine medium-entropy nano-particle metal material comprises copper metal and at least two precious metals, and the catalyst has outstanding catalytic ability. The preparation method of the catalyst is simple and convenient, and only the superfine medium-entropy nanoparticle metal material needs to be synthesized through a solvothermal method and is loaded on the conductive substrate material; the temperature of the whole synthesis process is lower than 200 DEG C, so that the problems of high cost, high energy consumption, poor stability, large potential safety hazard and the like in the traditional synthesis method are solved. The superfine medium-entropy nanoparticle catalyst prepared by the invention shows excellent performance in oxidation of micromolecules such as electro-catalysis ethylene glycol and the like. By taking ethylene glycol electrooxidation as an example, the Pb-CuPtPd MEANs-C can efficiently and stably convert ethylene glycol into glycollic acid, the mass activity of the Pb-CuPtPd MEANs-C under 0.9 V vs.RHE reaches up to 14 A mg <-1 > PtPd, and the Faraday efficiency (FEGA) of glycollic acid production is 82.3%.

The invention relates to a pyridine compound modified CuAu bimetallic nano hollow structure catalyst, and preparation and application thereof, and belongs to the technical field of electro-catalysis. The preparation method comprises the following steps: dropwise adding a chloroauric acid solution into hollow Cu2O nano-particles to obtain a core-shell structure with gold nano-particles loaded on the surfaces of the hollow Cu2O nano-particles, then carrying out solvothermal reaction to obtain hollow CuAu nano-particles, and then adding a pyridine organic modifier to obtain the hollow CuAu nano-particles. The catalyst prepared by the invention has a Cu < + > / Cu0 at Au functionalized catalytic interface, realizes differential adsorption of * CO intermediates and subsequent hydrogenation reaction process, and promotes asymmetric * CO-* CHO coupling, so that the activity and selectivity of ethanol products are remarkably improved, and the Faraday efficiency can reach 76%.

A system and method are disclosed for increasing the production yield of CO2 conversion products in an electrochemical reactor assisted by an osmotically driven dewatering system. The system comprises an electrochemical cell including a cathode chamber, an anode chamber, and a central desalination chamber. The cathode chamber includes a cathode active material, and the anode chamber includes an anode active material. The central desalination chamber comprises a plurality of desalination cells, each featuring alternating anion exchange membranes (AEMs) and cation exchange membranes (CEMs). A forward osmosis membrane (FOM) is integrated at the interface between the cathode chamber and the adjacent desalination cell, replacing the conventional terminal CEM. This configuration establishes an osmotic gradient that drives water flux from the cathode chamber into the desalination chamber, thereby concentrating the CO2 conversion product (e.g., formate) in situ and enhancing Faradaic efficiency without requiring post-treatment.

The application discloses a kind of Fe-N-C loaded gamma-Fe2O3 hollow ball material catalyst and its preparation method and application, the chemical formula of the catalyst is Fe (phen) 3Cl2, wherein, phen in structural formula is 1,10-ortho-phenanthroline ligand;The catalyst structural formula is as follows: the preparation method includes the following steps, and is prepared by pyrolysis of iron-based complex crystal and metal organic framework material ZIF-8, and the iron-based complex crystal is Fe (phen) 3Cl2 complex crystal.The catalyst can be used for the preparation of CO2 at normal temperature and pressure electrocatalytic reduction CO, the catalyst shows excellent CO selectivity in-0.5V~‑1.1V wide potential window, and after 2h continuous electrolysis at-0.6V, current density and CO Faraday efficiency are basically unchanged, and show excellent stability.