520 results about "Faraday efficiency" patented technology

The invention relates to the technical field of electrochemical carbon dioxide reduction reaction catalysts, and discloses a preparation method and application of a mixed ionomer modified cuprous oxide catalyst, a hydrophobic ionomer and a proton exchange ionomer are used for performing surface modification on cuprous oxide powder, an effective hydrophobic structure is constructed on a Cu2O active site in a physical coating form, and the cuprous oxide modified cuprous oxide catalyst is prepared. A stable and controllable hydrophobic gas-liquid-solid three-phase reaction micro-interface is formed, so that the problems of low C-2 Faraday efficiency, poor selectivity, serious competitive hydrogen evolution reaction, carbonate deposition and the like in the existing process of preparing a C-2 product by electrocatalytic carbon dioxide reduction are solved, and the industrial current density (gt; and the method has the advantages of simple process flow, low price, high product selectivity and the like.

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 discloses a cobaltosic oxide catalyst doped with lanthanide metal, a preparation method of the cobaltosic oxide catalyst and application of the cobaltosic oxide catalyst to ammonia production through nitrate reduction. The method comprises the following steps: carrying out hydrothermal reaction on cobalt nitrate hexahydrate and a lanthanide metal salt precursor in a mixed system of isopropanol and glycerol, and then carrying out high-temperature calcination to prepare the lanthanide metal-doped cobaltosic oxide catalyst. The preparation method disclosed by the invention is simple to operate and low in cost, the prepared lanthanide metal-doped cobaltosic oxide catalyst shows excellent Faraday efficiency, ammonia yield and cycling stability in an electro-catalysis nitrate reduction reaction, a traditional path of preparing ammonia from nitrate is broken through, and more efficient performance is realized.

The invention relates to a method for synergistically promoting electroreduction of carbon dioxide on the surface of copper into a C2 product through small molecules and a polymer, in particular to an efficient electrocatalytic carbon dioxide reduction system formed by co-modifying benzotriazole and polyvinylidene fluoride on the surface of copper, and belongs to the technical field of catalytic energy. According to the preparation method, benzotriazole (BTA) and polyvinylidene fluoride (PVDF) are sequentially coated on copper (Cu), so that a Cu-BTA-PVDF catalyst is formed. In a reaction of electrocatalytically reducing carbon dioxide into a C2 product, the small molecules can regulate a surface electronic structure or stabilize a key intermediate, and the polymer can encapsulate the small molecules to prevent the small molecules from falling off and exert an additional effect of the polymer. And the Faraday efficiency is remarkably improved under different overpotentials. After the catalyst is replaced by a copper-silver (CuAg) bimetallic catalyst, BTA and PVDF are sequentially coated, so that the Faraday efficiency of a C2 product is further improved. The smooth implementation of the patent provides a universal, simple, convenient and efficient strategy for regulating and improving the Faraday efficiency (FE) of reducing carbon dioxide into a C2 product through electro-catalysis, solves the problem of unstable structure of the conventional system, and provides greater possibility for industrialization in the field of electro-catalysis carbon dioxide reduction.

The invention belongs to the technical field of nano material preparation, and provides a preparation method and application of a rare earth ytterbium-doped copper oxide nano material. The method comprises the following steps: dissolving rare earth ytterbium salt, copper salt and a surfactant in a solvent, and uniformly stirring; dissolving an organic ligand in a solvent; stirring and mixing the two solutions, transferring into a reaction kettle, and carrying out hydrothermal reaction; and centrifugally washing the obtained product with ethanol, and drying to obtain the rare earth ytterbium doped metal organic precursor nano material. And placing the obtained nano material in a muffle furnace for high-temperature calcination to obtain the rare earth ytterbium doped copper oxide material. The preparation method provided by the invention is simple, green, pollution-free and high in practical degree, and the obtained rare earth ytterbium-doped copper oxide nano material can be used as a catalyst for synthesizing ammonia by electrolytic nitrate reduction, and shows that the rare earth ytterbium-doped copper oxide nano material has relatively high ammonia yield and Faraday efficiency for synthesizing ammonia by nitrate reduction.

The invention discloses a method for reducing nitro compounds through an electrochemical microreactor. According to the method, nitrobenzene or a derivative thereof is subjected to electrochemical catalysis in a multi-channel series electrolytic tank in a constant-current electrolysis mode to be reduced to generate aniline or a corresponding aniline derivative. According to the method disclosed by the invention, the Faraday efficiency is improved from 40% to more than 80% under the condition that the yield of the nitrobenzene is kept unchanged compared with that of the existing electrochemical reduction nitrobenzene, so that the fixed energy consumption is greatly reduced, and rapid, efficient, continuous and large-scale production of the nitrobenzene and the derivatives thereof is realized.

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 relates to a non-noble metal-based paired electro-catalysis method for producing formic acid by coupling cathode dehalogenation with anode formaldehyde oxidation, which realizes efficient dehalogenation removal of pollutants and generation of high-value products. The Co-CuxO nanowire electrode with excellent catalytic performance is synthesized through a simple method and serves as a cathode and an anode at the same time, and the purpose that the cathode removes halogenated pollutants and the anode oxidizes formaldehyde to produce formic acid at the same time is achieved. Co-CuxO promotes generation of H *, the performance of electroreduction dehalogenation is improved, and the removal rate of trichloroacetic acid can reach 92.1% or above. And moreover, the reaction energy barrier is reduced, the selectivity of formic acid generated by oxidizing anode formaldehyde is improved, and the formic acid selectivity and Faraday efficiency can reach 100%. A paired electro-catalysis system shows extremely stable and outstanding electro-catalysis performance in the aspect of converting wastes into value-added products, and the problems of poor anode utilization rate and high energy consumption in the current electro-catalysis dehalogenation reaction are solved.

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 present invention discloses a nano copper-based catalyst, its preparation method, and its application in the electrocatalytic reduction of carbon dioxide and carbon monoxide. Copper chloride (or copper nitrate, copper acetate) is dissolved in ultrapure water, and a sodium borohydride solution is added dropwise. Stir at room temperature for 5-60 min, filter, and dry to obtain a nano copper catalyst. Further, through a displacement reaction, nano copper-palladium and copper-silver catalysts are obtained. The present invention is applied to the electrocatalytic reduction of carbon monoxide. In a membrane electrode assembly (MEA) electrolyzer, the Faraday efficiency of multi-carbon products (C2+) reaches up to 95%, the partial current density reaches up to 3 A cm-2, and the overall electrolyzer energy efficiency reaches up to 39%. It can stably electrolyze for 30 hours at 1 A cm-2. This nano copper catalyst is applied to the electrocatalytic reduction of carbon dioxide. In an MEA electrolyzer, the Faraday efficiency of C2+ reaches up to 66%, and the partial current density reaches up to 331 mA cm-2.

According to the heteroatom-doped carbon nanohorn catalyst and the preparation method and application thereof, doping elements are accurately introduced into a carbon nanohorn framework in the preparation process of the catalyst, a stable heterostructure is formed, two-dimensional adsorption and activation of O2 molecules on the surface of an electrode are effectively enhanced, a two-electron reduction path is remarkably promoted, and the heteroatom-doped carbon nanohorn catalyst is prepared. The four-electron reduction side reaction is inhibited, the H2O2 selectivity and the oxygen reduction reaction (ORR) activity are enhanced, and the H2O2 yield and the Faraday efficiency are remarkably improved. Meanwhile, the heteroatom-doped carbon nanohorn catalyst has high electrochemical stability in a chloride ion-containing system, shows excellent stability and corrosion resistance under a natural seawater condition, and is suitable for long-time continuous operation.

The invention discloses a green formic acid co-production method based on electro-catalysis synergistic conversion of carbon dioxide and carbon-containing small molecules, and belongs to the technical field of new energy conversion and carbon resource utilization. According to the method, a paired electro-catalysis system is constructed; an iron / cobalt bimetal organic framework catalyst is adopted as an anode, so that high-selectivity electro-oxidation of ethylene glycol is realized to generate formic acid; a bismuth-based metal organic framework catalyst is adopted as a cathode, efficient electroreduction of carbon dioxide is achieved, formic acid is also generated, and therefore a high-added-value product is co-produced in a single system in a synergetic mode. Compared with a traditional electrolyzed water system, the method has the advantages that carbon-containing small molecules are used for replacing high-energy-consumption oxygen evolution reaction (OER), the electrolysis energy consumption is remarkably reduced, and meanwhile, the Faraday efficiency and the product selectivity are improved. According to the technical path, capture and resource conversion of CO2 are achieved, high-value utilization of typical carbon-containing organic waste liquid is promoted, and a sustainable, economical and efficient solution is provided for renewable energy-driven green chemical industry, carbon neutralization and clean energy development.

A membrane electrode for the preparation of hydrogen peroxide by means of oxygen reduction, a preparation method therefor, and a membrane electrode reactor. The membrane electrode comprises a cathode oxygen reduction electrode, a cation exchange membrane and an anode oxygen evolution electrode, which are stacked, wherein the cation exchange membrane is located between the cathode oxygen reduction electrode and the anode oxygen evolution electrode, and every two of the cathode oxygen reduction electrode, the cation exchange membrane and the anode oxygen evolution electrode are physically connected; the cathode oxygen reduction electrode comprises a cathode porous substrate layer and a cathode active layer, the cathode active layer comprising a cathode catalyst and a cation regulating and controlling material; and the anode oxygen evolution electrode comprises an anode porous substrate layer and an anode active layer, the anode active layer comprising an anode catalyst. The membrane electrode is suitable for the preparation of hydrogen peroxide by means of oxygen reduction, and has good hydrogen peroxide selectivity and high Faraday efficiency.

The invention discloses a three-dimensional porous sulfur-doped tin-antimony-nickel electrode and a preparation method and application thereof.The specific operation process includes the steps that a carrier is pretreated, the titanium carrier is used as a substrate, a sulfur-containing surfactant and tin-antimony-nickel metal salt are used as precursors, absolute ethyl alcohol and hydrochloric acid are used as solvents, and the three-dimensional porous sulfur-doped tin-antimony-nickel electrode is obtained; loading a sulfur-containing nanoparticle precursor material on the surface of the titanium carrier through a hydrothermal method; and drying the hydrothermal precursor material, and roasting in a muffle furnace to finally obtain the three-dimensional porous sulfur-doped tin-antimony-nickel-titanium substrate electrode. The catalyst disclosed by the invention has a three-dimensional porous spherical structure, the active specific surface area is obviously increased, the path of diffusing reactants to active sites is effectively shortened, the mass transfer resistance is reduced, the transfer of electrons and protons is promoted, and the reaction performance is improved. Sulfur doping not only improves the electrochemical reaction rate, conductivity and stability, but also shows high activity and high Faraday efficiency in electrocatalytic ozone production and chlorine evolution reactions.

The invention discloses a copper-based catalyst for preparing propyl alcohol by electrocatalytic reduction of carbon dioxide and application of the copper-based catalyst. The preparation method of the copper-based catalyst comprises the following steps: adding a sodium hydroxide solution into an aqueous solution of a copper compound to obtain a turbid solution; adding a hydroxylamine hydrochloride aqueous solution into the turbid solution, carrying out a reaction, and carrying out centrifugal drying to obtain Cu (OH) 2 / CuO; cu (OH) 2 / CuO is prepared into a working electrode, and then the working electrode is reduced into the Cu / Cu2O nanosheet through an electrochemical reconstruction method. The Cu / Cu2O electrocatalyst with the bicontinuous nano-domain structure is obtained by using a two-step electrochemical reconstruction method, and the Cu / Cu2O electrocatalyst is used as a cathode for electrocatalytic reduction of carbon dioxide. The hydrogen evolution reaction is inhibited in a KOH or KHCO3 aqueous solution system, so that the activity of propyl alcohol preparation is remarkably improved. Experiments show that the Faraday efficiency of propyl alcohol exceeds 12.1% under the current density of 0.84 A cm <-2 >, and the Faraday efficiency of propyl alcohol is good. According to the analysis, the Cu / Cu2O catalyst obtained through the electrochemical reconstruction method serves as the cathode, and the propyl alcohol can be prepared through the carbon dioxide electrocatalytic reduction reaction.

The invention provides a process for preparing a urea electrocatalyst through spray pyrolysis and synthesizing urea. The CuAg1Ru1 diatomic urea electrocatalyst prepared by a spray pyrolysis process can simultaneously perform C-N coupling and protonation tandem catalytic reaction of * CO2NH2, Ag1-Cu and Ru1-Cu sites synergistically promote UENC through a tandem catalytic mechanism, the Ag1-Cu site triggers C-N coupling and promotes the step from * CO2NH2 to * CO2NH, the Ru1-Cu site promotes the subsequent protonation step from * CO2NH2 to * COOHNH2, and the CuAg1Ru1 diatomic urea electrocatalyst has the advantages of simple preparation process, low cost and high efficiency. Three active sites of Ag, Ru and Cu exist in the whole catalytic process, the hydrogen evolution competitive reaction is effectively reduced in the reaction process, and the Faraday efficiency and the urea yield are effectively improved. The urea synthesis process provided by the invention is simple and environment-friendly, CO2 in air and NO3 <-> in sewage are used as raw materials in the urea synthesis process, and the national double-carbon policy is effectively met.

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 invention discloses a preparation method and application of a catalyst for generating benzonitrile through electrocatalytic oxidation of benzylamine, and belongs to the technical field of nanotechnology and electrocatalytic oxidation. The NiO-NiMoO4 / NF multi-component composite catalyst of a nanorod structure is used as an electrode, NiO and NiMoO4 form a heterogeneous interface synergistic system, rich active sites are achieved, and the catalyst shows remarkable advantages in benzylamine electrocatalytic oxidation. Under the working voltage of 1.55 V vs.RHE, 99% of benzylamine conversion rate and 94% of Faraday efficiency are achieved, the stability is good, and the catalytic effect is not attenuated after multiple times of recycling. The method breaks through the activity limitation of a non-noble metal catalyst in a low-alkalinity medium through a multi-component synergistic effect, has the advantages of low preparation cost and mild reaction, and avoids the problems of harsh reaction conditions, low yield and high toxicity of used reagents in other synthesis methods.

The invention relates to an electroreduction method for synthesizing acetamide by coupling carbon dioxide and nitrate through electrocatalysis. The electroreduction method specifically comprises the steps that cobalt salt, copper salt, a nitrogen source and carbon source carbon black are mixed, heated and calcined, and a carbon nitride loaded copper-cobalt diatomic catalyst is prepared; loading the obtained carbon nitride loaded copper-cobalt diatomic catalyst on the surface of carbon paper to prepare a gas diffusion electrode of a three-chamber flow cell electrolytic tank; the obtained gas diffusion electrode is applied to a three-chamber flow cell electrolytic tank to prepare acetamide through electroreduction. The copper-cobalt double-atom catalyst is used for synthesizing acetamide through electrochemical coupling of carbon dioxide and nitrate, the acetamide Faraday efficiency in a flow cell can reach 18% or above, and the yield is 81.2 mg L <-1 >. H <-1 >. Compared with the prior art, the prepared copper-cobalt diatomic catalyst has high selectivity for generation of acetamide through co-reduction coupling of carbon dioxide and nitrate radicals, and synchronous treatment of greenhouse gas carbon dioxide and nitrate wastewater and value-increasing utilization of carbon and nitrogen resources can be achieved.

The invention provides a Bi-doped SnO catalyst and a preparation method and application thereof, a gas diffusion electrode and a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: mixing divalent metal tin salt, a regulator and bismuth salt in water to obtain a mixed solution; and mixing the mixed solution with a sodium hydroxide solution, and reacting to obtain the Bi-doped SnO catalyst. The preparation method is simple, rapid, low in cost, green and free of organic solvent or high-temperature treatment, and the prepared catalyst is stable in structure and lasting in performance. The Faraday efficiency of a gas diffusion electrode prepared by adopting the Bi-doped SnO catalyst for synthesizing formic acid through electrocatalytic reduction of CO2 at-850 mA / cm < 2 > is as high as 98%, the gas diffusion electrode can stably run for more than 140 h under N2 purging in a solid electrolytic tank, and the concentration of formic acid continuously produced exceeds 5 mol / L.

The invention discloses a method for synthesizing a carbon fiber loaded nitrogen-doped copper-nickel alloy catalyst based on a Joule heat technology and application of the carbon fiber loaded nitrogen-doped copper-nickel alloy catalyst. The carbon fiber-loaded nitrogen-doped copper-nickel alloy catalyst is successfully prepared by taking carbon paper as a substrate through a Joule heat technology, the carbon fiber-loaded nitrogen-doped copper-nickel alloy catalyst as a catalyst shows excellent catalytic performance in a reaction system for synthesizing urea through co-reduction of nitrate and carbon dioxide, and 68% of Faraday efficiency and 544 [mu] g cm <-2 > h <-1 > of urea yield are achieved under-0.5 V v.RHE. The preparation method of the catalyst has the advantages of being simple, rapid, green, environmentally friendly and the like, and a new method and a new idea are provided for the field of 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.

An electrolysis device includes: an electrolysis cell; a cathode supply flow path; an anode supply flow path; a cathode discharge flow path; an anode discharge flow path; a cathode flow rate regulator to adjust a flow rate A of a cathode supply fluid; an anode flow rate regulator to adjust a flow rate B of a anode supply fluid; a first flowmeter to measure a flow rate C of a cathode discharge fluid; a second flowmeter to measure a flow rate D of a anode discharge fluid; and a control device to estimate a Faraday efficiency according to a relational expression for approximating the Faraday efficiency to a function including the C and D, and control the cathode flow rate regulator according to the estimated Faraday efficiency to control the A.

The invention discloses a preparation method of a functionalized carbon nanotube immobilized cobalt molecule complex and research on electrocatalytic CO2 reduction of the functionalized carbon nanotube immobilized cobalt molecule complex. The invention provides a dual combination strategy, specifically, a composite catalyst is prepared through an in-situ mixing process by taking a functionalized multi-walled carbon nanotube (MWCNT) as a conductive carrier and taking a peripheral modified cobalt tetrabipyridine molecular complex (Coqpy) as a catalytic active component. A carbon nanotube functional group is used as a first coordination ball to realize axial coordination bonding with a Co center, so that more electrochemical active cobalt complexes are allowed to be loaded, and interface electron transfer is accelerated. The pi-pi coupling effect of the peripheral conjugated group of Coqpy and MWCNT further strengthens the interaction and stability of electrons in the complex, and the CO Faraday efficiency and conversion frequency are respectively as high as 97.5% and 79s <-1 >. According to the composite electrode designed by the invention, the catalytic activity and stability of the catalyst are greatly improved, the process is simple, the method is novel, and the method is expected to become a universal and convenient method for preparing the heterogeneous molecular electrocatalyst.

The invention provides a catalyst for lithium-mediated ammonia synthesis, a preparation method of the catalyst, a working electrode and an electrolysis device, and belongs to the technical field of solid-electrolyte membranes. The catalyst comprises a matrix layer and a coating layer coating the surface of the matrix layer, wherein the matrix layer is made of ferromanganese oxide; the coating layer is a carbon fluoride layer; the surface of the catalyst has a highly polarized interface. According to the catalyst, the surface of a ferromanganese oxide is coated with a carbon fluoride layer through a direct packaging method, and when the catalyst is used as a working electrode, a semi-ionic C-F bond is generated, the higher polarization degree is shown, the electrochemical activity is good, and formation of lithium fluoride is greatly enhanced, so that components of a solid-electrolyte interface are accurately regulated and controlled, and the electrochemical performance of the catalyst is improved. The method can be used for promoting the transmission of lithium ions in the electrolyte, accurately regulating and controlling the components of lithium fluoride on a solid-electrolyte interface, promoting the lithium-mediated ammonia synthesis performance, effectively improving the ammonia production rate and Faraday efficiency, and realizing efficient ammonia synthesis in an organic system.

The invention discloses a preparation method and application of a beta-functionalized cobalt phthalocyanine axial connection carbon nanotube electrocatalyst, and relates to a preparation method and application of an electrocatalyst. The invention aims to solve the problem of low selectivity of glycolaldehyde synthesis in the prior art, the CoPcX-CNT electrocatalyst is prepared by adopting a method of combining organic synthesis and diazo treatment, and CoPcCN-CNT containing cyano-functionalized cobalt phthalocyanine has optimal H2O2 selectivity. The Faraday efficiency of 95.7% and the H2O2 yield of 20320 mmol.g <-1 >. H <-1 > can be achieved in a flowing electrolytic tank under the industrial current density of 300 mA. Cm <-2 >. And finally, adjusting the permeability of H2O2 by using an ion exchange membrane, and finding that the AEM system with proper permeability of H2O2 has the highest glycolaldehyde selectivity (63.5%). The method is applied to the field of H2O2 in-situ production and efficient utilization.

The invention discloses an oxyhalide atom cluster modified copper catalyst for electrochemical carbon dioxide reduction as well as a preparation method and application of the oxyhalide atom cluster modified copper catalyst, and aims to solve the problems of low activity, poor product selectivity and insufficient stability caused by catalyst reconstruction of a copper-based catalyst. According to the oxyhalide atom cluster modified copper-based catalyst, an oxyhalide atom cluster BiOX or MOCl is deposited on the surface of a metal active center copper-based material, and then negative voltage is applied in a CO2 gas atmosphere for reduction treatment, so that the oxyhalide atom cluster modified copper catalyst is formed. The general chemical formula of the oxyhalide atom cluster modified copper catalyst is BiOX / Cu or MOCl / Cu. The prepared oxyhalide cluster modified copper nano-catalyst has outstanding activity, selectivity and stability, has good multi-carbon Faraday efficiency in the electrochemical carbon dioxide reduction process, and has long-time stability, and FEC < 2 + > is larger than 75%.

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.

To suppress a decline in an electrolytic efficiency.SOLUTION: An electrolytic apparatus comprises: an electrolysis cell; a cathode supply flow path in which a cathode supply fluid including a carbon dioxide gas flows; an anode supply flow path in which an anode supply fluid including water flows; a cathode discharge flow path in which a cathode discharge fluid including a carbon compound and a carbon dioxide flows; an anode discharge flow path in which an anode discharge fluid including oxygen and water flows; a cathode flow rate adjuster for adjusting the flow rate A of the cathode supply fluid; an anode flow rate adjuster for adjusting the flow rate B of the anode supply fluid; a first flow rate meter for measuring the flow rate C of the cathode discharge fluid; a second flow rate meter for measuring the flow rate D of the anode discharge fluid; and a control device. The control device estimates a Faraday efficiency value according to a relational expression that approximates a Faraday efficiency value of the carbon compound as a function including the flow rate C and the flow rate D, and controls the flow rate A by controlling the cathode flow rate adjuster according to the estimated Faraday efficiency value.SELECTED DRAWING: Figure 1