631 results about "Faraday efficiency" patented technology

The invention discloses an electricity-hydrogen coupling system risk scheduling method based on robust safety deep reinforcement learning, and the method comprises the following steps: 1), considering the Faraday efficiency loss effect of an electrolytic cell, and constructing an electricity-hydrogen hybrid energy storage dynamic operation model; 2) considering the wind power uncertainty, and establishing an electricity-hydrogen coupling system risk scheduling model considering the dynamic operation of electricity-hydrogen hybrid energy storage; 3) constructing a robust constraint Markov decision architecture; 4) parameterizing the robust constraint Markov decision architecture by using a flexible action device-evaluator baseline algorithm; and 5) solving the risk scheduling model of the electricity-hydrogen coupling system by using the parameterized robust constraint Markov decision process architecture to obtain a risk scheduling scheme of the electricity-hydrogen coupling system. According to the method, the new safety deep reinforcement learning algorithm is provided for the important requirements of energy low-carbon green transformation and energy safety, efficient and strict management and control of the electric hydrogen coupling system risk are achieved, and the reliability and safety of system operation are guaranteed.

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 discloses a Cu-metal phthalocyanine heterojunction catalyst, a preparation method thereof and application of the Cu-metal phthalocyanine heterojunction catalyst in preparation of 2, 5-furandimethanol through electro-catalytic hydrogenation of 5-hydroxymethylfurfural. A CuO nanowire is used as a carrier, metal phthalocyanine nanoparticles are effectively loaded through the coordination effect of 3, 4-dihydroxybenzonitrile by utilizing solvothermal reaction, and then the Cu and metal phthalocyanine heterojunction catalyst is prepared through electroreduction. The preparation method is simple, the raw materials are low in price, no precious metal is used, the production cost is effectively reduced, and the industrial application prospect is good; the catalyst has excellent electro-catalytic hydrogenation performance: at room temperature and normal pressure, the selectivity of 2, 5-furandimethanol can reach 100%, the conversion rate of 5-hydroxymethylfurfural reaches 95%, and the Faraday efficiency reaches 89%.

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 the technical field of electro-catalysis materials, and discloses an iron-doped copper oxide catalyst, a preparation method thereof and application of the iron-doped copper oxide catalyst in electro-catalysis of nitrate to synthesize ammonia. The method comprises the steps that CuCl2 serves as a metal precursor, ascorbic acid serves as a reducing agent, and Cu2O nanoparticles are obtained through a hydrothermal precipitation method; then, Cu2O is added into a solution containing FeSO4, sodium borohydride is added, centrifugal washing and drying are carried out, and the iron-doped copper oxide nitrate electroreduction catalyst which is rich in defects and uniform in metal dispersion is obtained through a programmed heating pyrolysis reduction method. The electro-catalytic material obtained by adopting the method disclosed by the invention has a relatively large catalytic active area and relatively abundant defect sites and oxygen vacancies, the nitrate adsorption and activation effects are improved, the supply of active hydrogen is promoted by constructing stable heterogeneous active sites, the product selectivity and Faraday efficiency in NO3RR are improved, and the electro-catalytic material has good durability.

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 belongs to the field of photoelectrocatalysis ammonia production, and particularly discloses a Ti (at) TiO2 array (at) CuxPt alloy composite electrode, preparation of the Ti (at) TiO2 array (at) CuxPt alloy composite electrode and application of the Ti (at) TiO2 array (at) CuxPt alloy composite electrode to photoelectrocatalysis NO3 <-> reduction ammonia production, and the Ti (at) TiO2 array (at) CuxPt alloy composite electrode comprises a Ti substrate, a TiO2 nanosheet array growing on the surface of the Ti substrate in an in-situ mode and nano CuxPt alloy particles distributed on the TiO2 nanosheet array in a dispersed mode; tiO2 nanosheets in the TiO2 nanosheet array grow in the Z-axis direction of the Ti substrate; and a heterogeneous interface exists between the nano CuxPt alloy particles and the TiO2 nanosheet array. The self-supporting material provided by the invention has excellent NH3 production activity, Faraday efficiency and stability.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a one-pot preparation method of a high-alloying gold-silver alloy aerogel material and application of the high-alloying gold-silver alloy aerogel material in electro-catalytic reduction of CO2. According to the preparation method, chloroauric acid and silver nitrate are selected as precursors for synthesizing the AuAg alloy aerogel, the AuAg alloy aerogel is prepared through a simple one-pot preparation method, and complex processes such as ultrafiltration centrifugal purification and concentration and heat treatment are not needed. Compared with an existing two-step method, the preparation process is complex, time and labor are consumed, and heat treatment is needed. However, according to the one-pot preparation method used in the invention, the high-alloying AuAg alloy aerogel can be obtained only by simply feeding, stirring and standing at room temperature. Moreover, the alloying degree of the obtained AuAg aerogel is higher, higher CO selectivity is shown in CO2RR application, and compared with AuAg alloy aerogel obtained through an existing two-step method, the CO Faraday efficiency of the AuAg aerogel is improved by about 37.1%.

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 relates to a preparation method and application of a CoFe2O4 / FeOOH (at) IF self-supporting electrode for efficient electrocatalytic synthesis of ammonia. The invention relates to a preparation method and application of a CoFe2O4 / FeOOH (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 foam iron (IF), cobalt nitrate hexahydrate, ferric trichloride hexahydrate, urea and ammonium fluoride as raw materials, preparing a CoFeOOH (at) IF precursor material through a one-step hydrothermal reaction, and then successfully preparing the CoFe2O4 / FeOOH (at) IF self-supporting electrode with high ammonia yield and Faraday efficiency through tubular furnace calcination. The CoFe2O4 / FeOOH (at) IF self-supporting electrode can be directly used as a working electrode to electrocatalyze nitrate radicals to reduce and synthesize ammonia.

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 preparation method of a cobalt-based nano-foam hybrid catalyst and application of the cobalt-based nano-foam hybrid catalyst in electrocatalytic synthesis of urea, and the preparation method comprises the following steps: dissolving glucose, urea, cobalt nitrate and other metal salts in deionized water, and stirring to form a uniform solution; heating the solution to form porous foam; and putting the porous foam into a tubular furnace, heating in an air atmosphere, cooling to room temperature, and carrying out heat treatment in argon-hydrogen mixed gas to form the cobalt-based nano-foam hybrid catalyst. According to the preparation method of the cobalt-based nano-foam hybrid catalyst, the material synthesis method is simple and convenient, CoCr < 1% > has the optimal Faraday efficiency and yield under-0.3 V (RHE), 23% of urea Faraday efficiency and 60 mmoL g <-1 > cat h <-1 > urea yield are achieved under the condition that CO2 is saturated in 0.2 M KHCO3 and 20 mM KNO2 electrolyte, the current density reaches 16 mA cm <-2 >, and compared with the same type of catalysts, the cobalt-based nano-foam hybrid catalyst has the advantages that the cobalt-based nano-foam hybrid catalyst has the advantages that the cobalt-based nano-foam hybrid catalyst is low in cost and good in performance. The device has the advantages of potential correction and lower energy consumption.

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.

The invention relates to the technical field of synthesis of electrochemical materials, in particular to an electrocatalyst of magnesium-doped copper oxide nanospheres and a preparation method and application of the electrocatalyst, and the electrocatalyst is prepared through a one-step hydrothermal method and is of a nanosphere structure with a uniform microstructure. According to the catalyst, in a wide voltage range from-1.277 V vs.RHE to-1.677 V vs.RHE, relatively high Faraday efficiency of electrochemical reduction of carbon dioxide into C2 + chemicals is realized. In addition, the technology is green and environment-friendly, the raw materials used in the technology are cheap, the preparation process is simple, the energy consumption is low, a new thought is provided for preparation of the electrocatalyst for generating high-added-value products, and the method has a good application prospect.

The invention relates to a preparation method and application of an iodine-doped cobalt-based electrocatalyst. According to the method, cobalt is successfully anchored on an iodine-doped carbon substrate in a form of coexistence of single atoms and clusters in one step by using a strategy of carrying out doping and synchronous etching by using mild ammonium iodide; the obtained iodine-doped cobalt-based electrocatalyst has series catalytic active sites composed of iodine-coordinated cobalt single atoms and cobalt clusters, and can promote deoxidation and hydrogenation steps in an electrocatalytic nitrate reduction reaction at the same time. The obtained electrocatalytic synthesis ammonia shows the ammonia yield exceeding 17000 microgram h <-1 > mgcat.-1 and the Faraday efficiency larger than 95%, high ammonia yield and high Faraday efficiency are achieved at the same time, and a new thought is provided for green, efficient and sustainable ammonia synthesis.

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 copper-rich phase high-entropy alloy and application thereof in urea synthesis, and belongs to the technical field of electro-catalysis. According to the method, serine and histidine functionalized and boron-doped graphene quantum dots (SHB-GQD) and a copper-rich phase are introduced, so that the urea synthesis electro-catalytic performance of the MnFeCoNiCu2.0 high-entropy alloy (MnFeCoNiCu2.0 HEA / SHB-GQD) is improved; the method disclosed by the invention is green and environment-friendly, simple and easy to implement and relatively low in cost, and shows excellent electrocatalytic activity and high stability. According to the MnFeCoNiCu2. 0HEA / SHB-GQD urea prepared by the preparation method disclosed by the invention, the synthesis rate reaches 59.01 mmol gcatalyst <-1 > h <-1 >; the Faraday efficiency reaches 26.6%; and the influence on the urea synthesis yield and the Faraday efficiency is small after the catalyst is recycled for 8 times.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a perylene-based composite material electrode with Ni loaded on carbon cloth and application of a preparation method of the perylene-based composite material electrode in electro-catalysis nitrate reduction. The preparation method comprises the following steps: dissolving perylene-3, 4, 9, 10-tetracarboxylic dianhydride, imidazole and 2, 4, 6-tri (4-aminophenyl)-1, 3, 5-triazine in DMF (Dimethyl Formamide), continuously refluxing for 48 hours under the condition of stirring at 180 DEG C, repeatedly cleaning with DMF, and drying to obtain a perylene-based material; the preparation method comprises the following steps: dissolving nickel nitrate hexahydrate, thiourea and a perylene-based material in tetrahydrofuran (THF), reacting at 160 DEG C for 24 hours, centrifuging, washing and drying to obtain the perylene-based composite material of Ni, which is stable in structure, convenient to synthesize and good in catalytic performance. The composite material is prepared into printing ink, carbon cloth is coated with the printing ink, a reduction electrode is prepared, the electrode is used for electro-catalysis of nitrate radicals, the Faraday efficiency is 31.49% under-1.2 V v.s.RHE, the ammonia nitrogen yield is up to 357.70 mmol h <-1 > g <-1 >, and the electrode has excellent nitrate radical reduction catalytic activity.

The invention provides a vanadium oxide modified bismuth tin alloy electrocatalyst and a preparation method and application thereof. The electrocatalyst is BiSn (VOx) and has a two-dimensional nanosheet morphology, the BiSn is an alloy, the VOx is modified on the surface of a BiSn nanosheet in a cluster form, and the lattice spacing of the BiSn (VOx) corresponds to the (012) plane of Bi. The BiSn (VOx) electrocatalyst with high selectivity and high activity is directly prepared through a one-step electrodeposition method, the electrocatalytic activity of a bismuth-based material is remarkably improved through vanadium oxide modification and tin alloying, the electrocatalyst can achieve formate Faraday efficiency exceeding 90% in a wide potential window, and the preparation method has the advantages that the preparation method is simple, the cost is low, and the application prospect is wide. And good stability is shown in a cycle test. In addition, the electrocatalyst shows excellent performance in a chargeable and dischargeable Zn-CO2 battery system and a co-electrolysis system.

The invention discloses a multi-stack parallel proton exchange membrane optical hydrogen system power distribution method considering electrolysis device efficiency and hydrogen production amount, and aims to solve the problem of low electrolytic cell efficiency and hydrogen production amount caused by low-power operation of part of electrolytic cells under continuous fluctuation of photovoltaic power in a multi-electrolytic cell parallel optical hydrogen system. In order to improve the efficiency and hydrogen yield of an electrolytic cell of a hydrogen production system under photovoltaic power fluctuation in a light hydrogen system and ensure efficient and stable operation of the system, firstly, a multi-stack parallel proton exchange membrane (PEM) electrolytic cell photovoltaic hydrogen production system model is established through MATLAB / simulink; when the efficiency of the electrolysis device is analyzed, the electrolysis efficiency, the Faraday efficiency, the efficiency of auxiliary equipment of an electrolysis system and the conversion efficiency of a converter are comprehensively considered, and the hydrogen production amount of a multi-stack parallel electrolytic cell system (MPES), the efficiency of the electrolysis device, the operating power state of the electrolytic cell and the like serve as evaluation indexes. The reference power value of each branch is calculated off line through a dung beetle optimization algorithm (DBO), the system output power of each branch proton exchange membrane electrolytic cell (PEMEL) is optimized in real time, the hydrogen production of the MPES is improved, and the constraint power fluctuation rate is considered. And finally, inputting actual photovoltaic fluctuation data in an experimental example, and verifying the effectiveness of the method by comparing with a traditional electrolytic cell power distribution strategy.

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.

The invention relates to the technical field of preparation of ozone through electro-catalysis, and discloses a device and a method for preparing ozone gas through electro-catalysis without an ion exchange membrane. The device comprises a porous anode, a porous cathode, a hydrophilic insulating diaphragm, an anode collector plate with a gas flow channel, a cathode collector plate with a gas flow channel and an electrolyte chamber, and the porous anode and the porous cathode are separated by the hydrophilic insulating diaphragm. The hydrophilic insulating diaphragm guides and restrains electrolyte on the surfaces of the porous anode and the cathode through capillary action, in the electrifying process, electrocatalytic oxidation of water occurs on the surface of the porous anode, ozone is generated, external air is fed into a flow channel of the anode collector plate, and then ozone gas generated by the anode is brought out of the anode. The device can efficiently generate ozone gas under the conditions of room temperature and neutral electrolyte solution, and has the advantages of excellent Faraday efficiency, good safety, wide application field and wide application prospect.

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 relates to the technical field of catalysts, in particular to a porous monodisperse copper-loaded cerium oxide catalyst and a preparation method and application thereof.The microstructure of the catalyst is of a net-shaped structure formed by staggered ordered nanofibers, and the preparation method comprises the following steps that firstly, metal salt containing bivalent copper ions is combined with terephthalic acid; a Cu-BDC precursor is prepared; and uniformly stirring and mixing the Cu-BDC and a metal salt containing trivalent cerium ions, and calcining in a tubular furnace to obtain the Cu-BDC catalyst. According to the catalyst, under the external voltage of-1.18 Vvs.RHE, high Faraday efficiency of reducing carbon dioxide into methane through electro-catalysis is achieved; in addition, the technology is green and environment-friendly, the raw materials used in the method are cheap and easily available, the treatment time is short, the energy consumption is low, and the method has very high application value and very good application prospects.

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.