40results about How to "Improve Faraday efficiency" patented technology

The invention discloses a self-supporting Co / CoO / Co3O4 catalytic electrode rich in oxygen vacancy as well as preparation and application of the self-supporting Co / CoO / Co3O4 catalytic electrode. The preparation method of the catalytic electrode comprises the following steps: step 1, dissolving Co (NO3) 3.6 H2O and dimethylimidazole in ethanol, uniformly mixing, adding a foamy copper substrate, putting into a drying oven, carrying out solvothermal reaction to generate a Co-ZIF precursor, and drying after the reaction is finished to obtain foamy copper containing the Co-ZIF precursor; and 2, putting the foamy copper containing the Co-ZIF precursor into a tubular furnace, introducing hydrogen-argon mixed gas, and carrying out reduction calcination at 300-500 DEG C to obtain the catalytic electrode. The invention provides application of the catalytic electrode as a cathode in a reaction of synthesizing ammonia through nitrate electroreduction. The process conditions are simple, the prepared catalytic electrode can effectively promote the electroreduction process of nitrate radicals, and high ammonia yield and high Faraday efficiency are achieved.

The invention discloses a method for efficiently co-producing benzoquinone and cyclohexanone based on electrochemical oxidation / reduction of phenol, which adopts an acid-base mixed electrochemical electrolytic tank, the anode electrolyte is alkaline electrolyte, the cathode electrolyte is acidic electrolyte, the anode electrode is nickel foam loaded with nickel sulfide-nickel oxide composite nanosheets, and the cathode electrode is nickel foam loaded with nickel sulfide-nickel oxide composite nanosheets. The cathode electrode is a palladium-nickel-boron nanoparticle alloy with nitrogen-doped porous carbon as a carrier, and the anode electrolyte and the cathode electrolyte are separated by a bipolar membrane; the phenol is added into the anolyte and the catholyte, so that the phenol is electrochemically oxidized by the anode to generate an additional product benzoquinone with high economic value, and meanwhile, the phenol is catalyzed by the cathode to be reduced to generate an additional product cyclohexanone with high economic value. The whole system only needs to consume acid and alkali, the method has the advantages of being good in environmental protection effect and considerable in capacity, and the electrochemical electrolytic tank is good in stability, simple in preparation method, low in cost and easy to achieve large-scale production and has the potential to be applied to large-scale treatment of acid and alkali wastewater containing phenol in industry.

The invention relates to the technical field of electrode material preparation and electro-catalysis application, in particular to preparation of an F-doped CuO-Co3O4 electrode material and application of the F-doped CuO-Co3O4 electrode material to ammonia production through electro-catalytic reduction of nitrate under a low-voltage condition. The transition metal heterojunction electrode material (F-doped CuO-coated Co3O4) is prepared through a two-step method, firstly, transition metal salt is loaded on a substrate electrode through a molten salt method, and then the transition metal heterojunction electrode material is obtained through a hydrothermal method and calcination. And the prepared electrode material has the outstanding advantages of low voltage and high yield in ammonia production through nitrate reduction. Especially, under the neutral condition, the composite material shows excellent electrocatalytic activity, under-0.55 V, the ammonia yield is up to 42.83 mg / h.cm < 2 >, the Faraday efficiency is 99.36%, and the composite material can be recycled for more than 15 times and has good stability. The electrode material is simple in preparation process, low in cost and environmentally friendly, large-scale special equipment is not needed in the whole production process, industrial production is easy to achieve, and the electrode material has wide market application prospects.

The invention relates to a copper-cobalt modified photocathode and preparation thereof and application of the copper-cobalt modified photocathode in photoelectrocatalysis of urea synthesis, and belongs to the technical field of electrode materials, a copper-cobalt double-monatomic coating layer is constructed on the surface of a Cu2O nanorod, the copper-cobalt modified photocathode material Cu2O coated Cu1Co1 / NC is prepared, the corrosion resistance of the Cu2O photocathode is improved, and meanwhile, the photocathode material Cu2O coated Cu1Co1 / NC can be applied to photoelectrocatalysis of urea synthesis. And the double active centers are also utilized to improve the efficiency of preparing urea by catalyzing CO2 / NO3 <-> reduction by the Cu2O photocathode.

The invention discloses a multi-grain-boundary Cu-based catalyst for electrocatalytic reduction of low-concentration CO and a preparation method, and belongs to the field of catalyst preparation, and the preparation method comprises the following steps: (1) dissolving a certain amount of concentrated sulfuric acid, anhydrous cupric sulfate, sodium chloride, gelatin and the like in water at a certain temperature in sequence to prepare an electroplating solution; and (2) placing the electroplating solution in an electrolytic bath, and electrically depositing a certain amount of Cu on the gas diffusion layer under the conditions of certain temperature, voltage and current density by taking the foamy copper as an anode and the gas diffusion layer as a cathode to prepare the catalyst. The gas diffusion layer loaded multi-grain-boundary Cu-based catalyst provided by the invention can be used for efficiently electrocatalytically reducing low-concentration CO (5% CO / N2) under the conditions of normal temperature and normal pressure, reduction products are mainly ethanol, acetic acid and the like, and the total Faraday efficiency of CORR reaches 15.9% when the voltage is-0.83 V (vs.RHE).

The invention belongs to the technical field of electro-catalysis, and particularly relates to a modification method of a copper-based catalyst for electro-catalysis carbon dioxide reduction and a product and application of the copper-based catalyst. The modification method comprises the following steps: (1) respectively preparing a first solution containing copper ions and halogen ions and a second solution containing hydroxyl ions; (2) putting the copper-based material into the first solution, reacting, generating a cuprous halide phase on the surface of the copper-based material, and taking out the copper-based material; and (3) putting the copper-based material taken out in the step (2) into the second solution, and reacting to generate cuprous oxide in situ. According to the method, a copper-based material is subjected to a neutralization reaction to generate cuprous chloride, and then a reconstruction reaction is performed to generate cuprous oxide, so that in-situ preparation of the high-adaptability nano cuprous oxide particles is successfully realized, and the cuprous oxide can be used for efficiently reducing carbon dioxide or carbon monoxide into a multi-carbon product; and high selectivity, good structural stability, long-time operation stability and large-current operation capability are realized.

The invention discloses a macro production method of a cobalt monatomic catalyst for acidic electrosynthesis of hydrogen peroxide, which comprises the following steps: taking cheap transition metal cobalt as a raw material and dicyanodiamine as a carrier precursor, and loading cobalt monatomic on a carbon layer by ball milling and high-temperature calcination to obtain the cobalt monatomic catalyst. The catalyst has high-activity reaction sites and a large-scale preparation process, so that the laboratory scale limitation of monatomic catalyst synthesis can be effectively broken through, and macro synthesis of the catalyst is realized; and under the acidic electrolyte of the H-type electrolytic tank, the cobalt monatomic catalyst improves the Faraday efficiency (FE) of the reaction by enhancing the activity of the cathode oxygen reduction reaction. Under 0.2 V (vs RHE), the hydrogen peroxide yield reaches 390 mmol gcat <-1 > h <-1 >, FE is as high as 97%, meanwhile, the cobalt monatomic catalyst can keep stable performance for more than 12 hours, and the stability is good.

The invention belongs to the technical field of water-splitting-oriented electrocatalytic materials, and relates to a preparation method and application of a coordination polymer-based electrocatalyst, and the preparation method comprises the following steps: taking L as an organic ligand; monometal coordination polymers Co-L, Cu-L and Ag-L, bimetallic coordination polymers Cu / Co-L, Ag / Co-L and Ag / Cu-L and a trimetal coordination polymer Ag / Cu / Co-L are prepared through a hydrothermal method by taking Cu < 2 + >, Co < 2 + > and Ag < + > in transition metal salt TM as nodes. The preparation method is simple, the raw materials are low in price, the obtained trimetal bis (triazolyl) metal organic framework electrocatalyst has excellent electrochemical performance when used as an electrode material in electrocatalytic water decomposition, the requirement of the electrocatalyst for water decomposition is met on the molecular level, and the electrocatalyst has good application prospects. And a way is provided for designing a coordination polymer-based electro-catalytic material based on a structure-activity relationship.

The invention relates to the technical field of electrosynthesis of high-added-value products, in particular to a supported catalyst for producing hydrogen peroxide through electrocatalytic oxygen reduction and a preparation method and application of the supported catalyst. The catalyst is represented by a formula NiTPP (at) CNT-ox, an oxygen-doped carbon nanotube CNT-ox is used as a carrier, and nickel tetraphenylporphyrin NiTPP is used as an active site. According to the preparation method, NiTPP is adsorbed on CNT-ox through a dispersion-adsorption method, and the supported catalyst NiTPP coated CNT-ox is obtained. The NiTPP-CNT-ox prepared by the method has relatively high catalytic activity, selectivity and excellent stability in the process of preparing hydrogen peroxide by electrocatalytic oxygen reduction, and has a potential application prospect.

This invention provides a method for preparing a foamed copper-based composite organic compound layer catalytic material, comprising the following steps: forming 8-hydroxyquinoline molybdenum (Mo(C)) on the surface of a foamed copper matrix. 9 H 6 NO) 4 Organic compound layer; 8-hydroxyquinoline molybdenum (Mo(C)) 9 H 6 NO) 4 The organic compound layer is converted into phthalimide 8-hydroxyquinoline molybdenum (C). 8 H 4 NO 2 ) 2 (C 9 H 6 NO) 2 ; Phthalimide 8-hydroxyquinoline molybdenum Mo(C) 8 H 4 NO 2 ) 2 (C 9 H 6 NO) 2 Conversion to copper phthalimide / 8-hydroxyquinoline molybdenum Cu(C) 8 H 4 NO 2 ) 2 / Mo(C 9 H 6 NO) 2 The foamed copper-based composite organic compound layer catalytic material is finally obtained. The catalytic material prepared by the method of this invention can effectively improve the Faradaic efficiency, ammonia selectivity, production rate, and nitrate removal rate of the electrochemical reduction of nitrate to ammonia technology.

The present invention discloses a portable hydrogen generating device based on water free radical cations, and the technical scheme thereof is as follows: comprising a housing, a power source, a reaction chamber with an air inlet and an air outlet, a benzene generator for generating a benzene gas flow, and a deionized water generator for generating a deionized water gas flow, wherein the benzene generator and the deionized water generator are both connected to the air inlet of the reaction chamber, an anode plate and a cathode plate are respectively provided on both sides of the reaction chamber, a plurality of corona needles arranged toward the cathode plate are provided on the anode plate, and the anode plate and the cathode plate are both connected to the power source. Compared with the prior art, the hydrogen generating device of the present invention is easy to use, the conditions required for the preparation of hydrogen are simple, the hydrogen production concentration is high, the energy consumption is low, dry burning does not occur, and the safety is good.

This invention discloses a Co3O4 / CeO2 composite electrode, its preparation method, and an electrosynthesis method for epoxides. The Co3O4 / CeO2 composite electrode comprises carbon paper and a Co3O4 / CeO2 nanoneedle composite material supported on the carbon paper. This invention uses the Co3O4 / CeO2 nanoneedle composite material as the anodic electrocatalyst to prepare epoxides in a chloride-mediated aqueous solution system with olefins as substrates under low / room temperature and atmospheric pressure via anodic electrooxidation. The electrosynthesis method of this invention uses water as the sole oxygen source, eliminating the need for external peroxides, molecular oxygen, or other hazardous oxidants. The reaction conditions are mild, environmentally friendly, and energy-efficient, exhibiting both high activity and high stability. It is applicable to the electro-epoxidation reactions of various olefin substrates, solving problems such as severe oxygen evolution side reactions, poor catalyst stability, and difficulty in balancing activity and selectivity in existing technologies.

This invention relates to a copper oxide material, its preparation method, and its application. The preparation method includes: mixing an inorganic base, a dispersant stabilizer, and a copper salt in water to form a raw material solution; carrying out a precipitation reaction; washing and drying the precipitated product to obtain the copper oxide material; the pH value of the raw material solution is 13.10-14; the copper salt includes copper acetate. This invention also provides the copper oxide material obtained by the above preparation method and its application in the electrocatalytic reduction of carbon dioxide. The preparation method is simple and controllable, and the prepared copper oxide material exhibits high electrocatalytic carbon dioxide reduction performance.

An electrochemical preparation method and application of a carbon-coupled nickel-iron-based catalyst for electro-reduction of nitrates to synthesize ammonia, wherein nickel nitrate hexahydrate, iron nitrate nonahydrate, ammonium fluoride and urea are dissolved in deionized water to obtain a mixed solution. The mixed solution is added to a pre-assembled electro-deposition cell, and electro-deposition is performed in a constant voltage manner. After the reaction is completed, the cathode plate is carbon-coupled with a nickel-iron-based electrocatalyst. When used, the carbon-coupled nickel-iron-based electrocatalyst is used as a cathode plate, a commercial platinum sheet electrode is used as an anode plate, and a reference electrode is Ag / AgCl. An H-type electrolytic cell of a three-electrode system is assembled, a mixed solution of KNO3 and KOH is loaded into the cathode, and an equal amount of KOH solution is loaded into the anode to assemble into a reaction cell. The gas switch is turned on, high-purity argon is introduced, and electrolysis is continued. The present invention can effectively inhibit the occurrence of hydrogen evolution side reactions, and at the same time, the abundant oxygen vacancies on the surface of the carbon fiber paper are combined with the metal active sites to obtain extremely high Faraday efficiency, and the metal loaded by the electro-deposition method has excellent cycle stability and can react for a long time.

The invention discloses a method for electro-catalytically synthesizing 6-aminocapronitrile by using a coated electrode, which comprises the following steps: taking cyclohexanone and ammonium chloride as electrolyte, adopting a three-electrode system, and carrying out electro-catalytically synthesizing 6-aminocapronitrile in a RHE potential range of-0.6 V vs to-1.1 V vs at room temperature, wherein the catalytic electrode is formed by coating a catalyst on a substrate, the catalyst is CoOx / CuOx, CoOx or a mixture of CoOx and CuOx, and the substrate is foamy copper subjected to acid treatment and roasting; in the catalytic reaction process, cyclohexanone is subjected to hydrogenation reduction through a cathode to generate cyclohexanol and reacts with NH4 < + > to generate imine, and then the imine is further subjected to hydrogenation reduction on the cathode to generate 6-aminohexanol; the generated 6-aminohexanol is oxidized into 6-aminohexanal on the surface of the anode, the 6-aminohexanal reacts with NH4 < + > to generate 6-aminohexanamide, and the 6-aminohexanamide is further dehydrated to generate 6-aminocapronitrile. The preparation process is simple, easy to control and environmentally friendly, the raw materials are cheap and rich in resources, and the problems that traditional 6-aminocapronitrile synthesis is high in energy consumption, low in selectivity and dependent on precious metal catalysts are effectively solved.

A catalyst for the electrolytic reduction of carbon dioxide and / or carbon monoxide, in which copper particles are supported on the surfaces of diamond-like carbon particles, and a part of the surfaces of the diamond-like carbon particles are covered by the copper particles.

The invention discloses an atomic dispersion monatomic catalyst and a preparation method and application thereof.The preparation method comprises the steps that a nanocluster intermediate and water are mixed to be uniform, the pH value is adjusted to be smaller than or equal to 3 through an acid solution, a nanocluster intermediate solution is obtained, under the stirring condition, a metal solution and the nanocluster intermediate solution are mixed, and the atomic dispersion monatomic catalyst is obtained. The metal solution contains metal elements, and the metal elements in the metal solution are one or more of Fe, Mn, Cu, Co and Ni; and calcining the first powder to obtain the atomic dispersion monatomic catalyst. The atom dispersion monatomic catalyst prepared by the invention has higher oxidation-reduction potential, high hydrogen peroxide selectivity and high stability.

The invention relates to the technical field of electrocatalysis, and discloses a hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide and a preparation method thereof.The hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide comprises a base material and a catalyst arranged on the base material, the catalyst comprises a cobalt-chromium-molybdenum alloy and a coating layer coating the outer surface of the cobalt-chromium-molybdenum alloy, and the coating layer comprises a carbon coating layer and tungsten oxide loaded on the carbon coating layer. The molybdenum element, the cobalt element and the chromium element form an alloy, and CO accumulation is reduced. The surface of the cobalt-chromium-molybdenum alloy is coated with the carbon coating layer, the conductivity of the hydroxide anode is improved, CO molecules are prevented from making contact with the surface of the alloy, in the long-term use process, the activity of a catalyst cannot be reduced due to CO poisoning, the hydroxide reaction can be efficiently conducted in the electrolysis process, the Faraday efficiency is improved, and the stability of the electrode is guaranteed. Tungsten oxide is loaded on the surface of the carbon coating layer, so that the activity and the stability are further improved.

The invention discloses an electrocatalyst, preparation and application thereof, and a biomass derived aldehyde fuel cell for co-production of electric energy and hydrogen. The invention particularly relates to preparation of an electrocatalyst for efficiently catalyzing oxidation of aldehyde groups to produce hydrogen and construction of a biomass derived aldehyde fuel cell capable of synchronously producing electric energy and hydrogen. The battery realizes higher output power density (173.5 mW / cm < 2 >), higher Faraday efficiency (close to 100%) and higher hydrogen production rate (1.96 mmol / cm < 2 > / h) at room temperature, and is at a leading level in the existing research. Besides, during power generation, biomass derived aldehyde of the anode is oxidized into corresponding carboxylic acid compounds, the process is carried out at room temperature and normal pressure, the reaction is flexible and controllable, and compared with a traditional aldehyde oxidation technology, the method has higher safety and economical efficiency. The method has a wide application prospect in the fields of power generation, hydrogen production, biomass conversion and the like.

The application relates to a Ni-W bimetallic catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: I. dissolving a soluble nickel salt, a soluble tungsten salt, and urea and ammonium fluoride in water to form a precursor solution; II. taking carbon paper as a carrier, immersing the precursor solution obtained in the step I in water, and performing hydrothermal reaction to grow the catalyst on the carbon paper; III. performing heat treatment on the carbon paper loaded with the catalyst obtained in the step II under a nitrogen atmosphere to prepare the Ni-W bimetallic catalyst. The Ni-W bimetallic catalyst prepared by the application presents a nano flower morphology, exposes more reaction active sites, the surface of the Ni-W bimetallic catalyst co-modified by single-atom tungsten and metal defects can enhance the adsorption of 5-hydroxymethylfurfural, the bulk phase composed of the Ni-W solid solution induces the generation of more active sites, greatly improves the overall catalytic activity, and realizes high HMF conversion rate, high 2,5-furan dicarboxylic acid yield and high faraday efficiency.

The invention provides a self-gating catalyst of a metal oxide semiconductor heterojunction, a preparation method and application, and belongs to the technical field of catalysts. A self-gating catalytic regulation strategy is adopted, a semiconductor is induced to be converted from a p type to an n type by constructing a metal oxide / metal ruthenium heterogeneous interface, and majority carriers are converted from a hole type to a free electron type; the n-type semiconductor heterojunction catalyst has a smaller space charge interval and higher carrier concentration and conductivity; meanwhile, ruthenium sites can provide more excellent catalytic activity sites, and synchronous enhancement of HER and HzOR catalytic activity is achieved. The self-gating catalyst of the metal oxide / metal ruthenium heterojunction is prepared through hydrothermal reaction, air calcination and electrochemical deposition in sequence; the hydrazine hydrate auxiliary hydrogen production system constructed by taking the NiO / Ru catalyst as the cathode and the anode has ultralow electrolytic voltage, high Faraday efficiency, low power consumption and high durability under the current density of 10 mA cm <-2 >.

The invention relates to the technical field of electrochemical reduction of carbon dioxide, and particularly discloses a preparation method of formic acid, which comprises the following steps: performing electrochemical reduction on a material containing carbon dioxide; wherein a cathode electrode used when the electrochemical reduction is carried out comprises a titanium-doped bismuth-based material, and the titanium-doped bismuth-based material has a nanorod shape; the titanium-doped bismuth-based material with the nanorod morphology is used as the electrocatalyst, the hydrogen evolution reaction in the electrochemical reduction reaction is inhibited, the formic acid selectivity is remarkably improved, the long-term stability is achieved in an electrolytic tank, and particularly, carbon dioxide can be efficiently reduced into pure formic acid in a solid electrolytic tank.

The invention discloses a method for halogen-mediated diaphragm-free electrosynthesis of cyclic carbonate and application thereof. The method comprises the following steps: carrying out electrochemical reaction by adopting a diaphragm-free flow reactor, adding halide salt, carbonate and an optionally added inorganic passivator into water and an N, N-dimethylformamide solvent to serve as a supporting electrolyte, and preparing the cyclic carbonate by a one-pot method by taking olefin and carbon dioxide as raw materials under the condition of constant current at room temperature. The method is reported for the first time for one-pot electrochemical preparation of ethylene to ethylene carbonate at present, the Faraday efficiency of ethylene carbonate is high, the productivity is high, the current density is large, the ethylene carbonate can stably run for 350 hours, and the method has industrial application prospects.

According to the synthesis method for preparing the nano-copper catalyst through the ball milling method, the nano-copper catalyst prepared through the ball milling method and the application, halogen copper salt and an organic solvent are mixed and subjected to ball milling, a precursor obtained after ball milling is subjected to ultrasonic centrifugal treatment, supernate is extracted, the supernate and a Nafion solution are mixed and then dropwise coated on the surface of a substrate, and the nano-copper catalyst prepared through the ball milling method is obtained. According to the preparation method, halogen copper salt is taken as a raw material, the nano-copper catalyst containing a nano-Cu elementary substance catalyst is prepared by using a green ball-milling method, due to the high grain boundary density of the unique crystal surface, the spherical nano-copper catalyst shows excellent performance on electrocatalytic CO2 reduction, the reduction reaction current density of the spherical nano-copper catalyst is large, and the spherical nano-copper catalyst can be used as a catalyst for electrocatalytic CO2 reduction. The composite material is high in Faraday efficiency, can be used as an electro-catalysis CO2 reduction catalyst, and has a good application prospect, and the preparation method is simple, mild in condition, environment-friendly and low in cost.

A lithium-mediated electrochemical method for ammonia synthesis, relating to the field of ammonia synthesis technology, solves the technical problems of severe side reactions, limited nitrogen mass transfer, and poor interfacial stability in existing lithium-mediated ammonia synthesis systems. Tetra(4-formylphenyl)porphyrin iron and an amino-containing multifunctional organic ligand are added to a mixed solvent of n-butanol and o-dichlorobenzene. An acid catalyst is added, and after stirring until homogeneous, the mixture is degassed and sealed for reaction. The solid product is collected by centrifugation, washed, and dried to obtain COF powder. This powder is then added to an ethanol-water solution, followed by ultrasonic dispersion with Nafion solution. The powder is then drop-coated / sprayed onto the surface of a carbon paper current collector and dried. This powder is used as the working electrode, with a platinum mesh as the counter electrode, a platinum wire as the quasi-reference electrode, and a LiBF4 tetrahydrofuran solution as the electrolyte. Ethanol is used as the proton donor, and electrolysis is performed under a nitrogen atmosphere using a constant current. This invention can be applied to the field of ammonia synthesis technology.

The invention relates to the technical field of electrochemical catalysis and carbon dioxide conversion, in particular to a silicon carbide loaded Ag30Cu14 nanocluster catalyst and application thereof in electrocatalytic CO2 reduction. The silicon carbide loaded Ag30Cu14 nanocluster catalyst is an Ag30Cu14 bimetallic nanocluster with precise atoms, the chemical formula is Ag30Cu14 (TPP) 4 (SR) 28, the silicon carbide loaded Ag30Cu14 nanocluster catalyst has an irregular structure of an Ag27 core and an Ag3Cu14 shell, and the silicon carbide is loaded with the Ag30Cu14 nanocluster; the silicon carbide-loaded Ag30Cu14 nanocluster catalyst prepared by the preparation method disclosed by the invention is a loaded CO2RR catalyst which is low in cost and accurate in atom structure, and the product selectivity can be regulated and controlled through post-treatment.

The present invention relates to an electrocatalytic method for the co-production of formic acid by coupling PET waste plastics with carbon dioxide; the method comprises: using a hydrothermal and high temperature treatment method to prepare a nickel-cobalt spinel oxide electrode with a nanowire structure as a catalytic anode for highly selectively oxidizing polyethylene terephthalate (PET) hydrolyzate to produce formic acid; using a hydrothermal and high temperature treatment method to prepare a tin dioxide electrode with a mesoporous structure as a catalytic cathode for reducing CO2 to produce formic acid; assembling the above two catalytic electrodes as an anode and a cathode to form a two-electrode catalytic system, respectively, to achieve high selectivity and high efficiency in the simultaneous production of formic acid by the positive and negative electrodes of the electrolytic cell at a relatively low reaction tank pressure. The present invention successfully prepares a cheap and efficient transition metal-based catalytic electrode by a simple hydrothermal and high temperature treatment method, and assembling the two-electrode catalytic system can achieve efficient and stable catalytic conversion of PET waste plastics and CO2 to produce high value-added chemical formic acid.

This invention belongs to the field of materials science, specifically disclosing an electrocatalyst, its preparation method, and its application. The electrocatalyst of this invention comprises a copper layer, a copper nanosheet array, and a quaternary ammonium salt polymer; the copper nanosheet array is disposed on the surface of the copper layer; the copper nanosheet array is composed of arranged copper nanosheets; the quaternary ammonium salt polymer is distributed on the surface of the copper nanosheets and between adjacent copper nanosheets. The electrocatalyst of this invention uses a quaternary ammonium salt polymer supported on the surface of and between the copper nanosheets, enabling the electrocatalyst to possess a robust and efficient gas-liquid-solid three-phase interface in a strongly acidic medium, effectively improving the selectivity, carbon conversion rate, and operational lifespan of the electrocatalyst for CO2 reduction.

The invention provides a copper-indium bimetal organic framework catalyst and a preparation method and application thereof, the copper-indium bimetal organic framework catalyst comprises a foamy copper substrate and a copper-indium bimetal organic framework, the copper-indium bimetal organic framework is a nano column or nano particle, and the copper-indium bimetal organic framework is distributed on the surface of the foamy copper substrate. According to the catalyst, the copper-indium bimetal organic framework grows on the foamy copper substrate, the nanoscale copper-indium bimetal organic framework is used for effectively promoting the reaction to be carried out in the methane generation direction, the problem that an existing copper-based catalyst is poor in product selectivity is solved, and the methane generation rate is effectively increased.

This apparatus 2 for producing an organic hydride is provided with: a cathode chamber 18 which contains a cathode electrode 14 for generating an organic hydride by hydrogenating an object to be hydrogenated in a cathode solution by means of protons; a cathode inlet 30 which is connected to the cathode chamber 18 in order to supply the cathode solution into the cathode chamber 18 from the outside; an upper cathode outlet 32 which is connected to the cathode chamber 18 in order to discharge the cathode solution and a hydrogen gas to the outside from the cathode chamber 18; and a lower cathode outlet 34 which is connected to the cathode chamber 18 at a lower position than the upper cathode outlet 32 in order to discharge the cathode solution and water to the outside from the cathode chamber 18.