74 results about "Cathode reaction" patented technology

The invention belongs to the technical field of hydrogen sulfide stress corrosion resistance detection of oil well pipes, and particularly relates to a method for testing the influence of anodic dissolution in saturated hydrogen sulfide on stress corrosion fracture of an oil well pipe, which comprises the following steps: respectively carrying out slow strain rate tensile tests in a saturated hydrogen sulfide environment and a nitrogen environment to obtain a stress-strain curve of an oil well pipe sample; measuring a hydrogen permeation curve of the oil well pipe sample in the saturated hydrogen sulfide environment; carrying out fast and slow sweep potential polarization curve test and hydrogen permeation curve test on the oil well pipe, and carrying out hydrogen charging-slow stretching test on the oil well pipe under the cathode hydrogen charging potential corresponding to the steady-state hydrogen permeation current density; and according to the damage degree of the saturated hydrogen sulfide environment to the mechanical properties of the oil well pipe, the minimum influence degree of hydrogen in the saturated hydrogen sulfide environment to the stress corrosion fracture of the oil well pipe is determined by combining the damage degree of hydrogen separated out from the cathode reaction to the mechanical properties of the oil well pipe. The device has the advantages of simplicity in operation and accurate measurement result.

This invention belongs to the field of organic electrochemical synthesis and microchemical technology, and relates to a method for preparing 2-chlorobenzoic acid by electrochemical reduction debromination in a continuous flow microreactor. The method includes: dissolving 3-bromo-2-chlorobenzoic acid, a supporting electrolyte, and a proton source in a polar aprotic solvent to prepare a cathode reaction solution; continuously feeding this solution into the cathode channel of a microchannel electrochemical reactor using a metering pump, while simultaneously pumping the anolyte into the anode channel; connecting a DC power supply and conducting a selective electrochemical debromination reaction under set current density, reaction temperature, and material residence time conditions; and obtaining high-purity 2-chlorobenzoic acid from the outlet material through gas-liquid separation, neutralization, extraction, and recrystallization. This invention combines a continuous flow microreactor with electrochemical debromination technology, significantly enhancing mass and heat transfer, resulting in a shorter reaction time, higher conversion and yield, and the addition of a reducing agent, ease of scale-up, and intrinsic safety, demonstrating promising industrial application prospects.

The present application relates to a kind of water treatment systems and applications for removing PFOA in soil washing wastewater by electrooxidation coupling hydrogen peroxide reduction, by preparing CF / FeCo-N-C with high H2O2RR activity as cathode, replacing traditional HER cathode reaction, improving cathode potential, reducing cathode polarization, reducing the input voltage and energy consumption of system.In addition, the water treatment system is also used for electrooxidation degradation of actual PFOA-containing soil washing wastewater, compared with prior art, the theoretical value of cathode potential can be increased from 0V vs.RHE of HER to 1.78V vs.RHE, realizing 1.02V of ultra-low thermodynamic equilibrium potential, realizing the significant reduction of energy consumption for deep treatment of PFOA-containing soil washing wastewater, providing new theoretical insights and practical significance for sustainable treatment of PFOA-containing soil washing wastewater, and providing a new technical mode for post-processing stage in soil remediation.

The application discloses a kind of based on the deconvolution technology's automobile dissimilar metal galvanic compatibility evaluation method, comprising the following steps: for dissimilar metal A material, through basic electrochemical parameters, including solution pH value, oxygen content, metal ion initial content etc. Information, the equilibrium potential of cathode reaction and anode reaction is calculated;Step defines the Tafel slope of oxygen and H+ reduction reaction, exchange current density and limiting diffusion current density parameter, and the cathode polarization curve of oxygen and H+ reduction is fitted.The application is suitable for corrosion protection technical field, relates to the galvanic corrosion compatibility evaluation method of dissimilar metal connecting structure in automobile, and the deconvolution technology is integrated into dissimilar metal galvanic compatibility evaluation, can significantly shorten experimental period, realizes the evaluation fast of dissimilar metal galvanic compatibility in automobile.

This invention discloses a nickel oxide-doped manganese dioxide catalyst, its preparation method, and its application. The catalyst is prepared by in-situ growth of nickel oxide-doped manganese dioxide on a carbon felt substrate using a solvothermal method. In the application, the catalyst electrode is used as the anode, and an aromatic compound is dissolved in an acidic solution as the anolyte. A counter electrode is used in the cathode chamber, and an acidic solution is used as the cathode reaction solution. After the reaction, an aromatic aldehyde or aromatic ketone can be obtained through a post-treatment process. The catalyst of this invention has a high surface area and porous structure, which increases the specific surface area of ​​the electrode, providing a large number of reaction sites and active sites for the oxidation of the substrate. In addition, the doping of nickel oxide provides more active sites for manganese dioxide, promoting the formation of intermediates and also promoting the desorption of the aromatic aldehyde product, preventing the formation of aromatic acids due to over-oxidation. Furthermore, the nanorod-like three-dimensional structure of the catalyst is beneficial for mass transfer.

The invention belongs to the technical field of electrocatalytic materials, and particularly relates to an electrocatalyst with a saturated coordination zinc diatom structure, a preparation method and application. Based on the principle that the boiling point of zinc chloride is lower than that of cadmium chloride and the boiling point of elemental cadmium is lower than that of elemental zinc, ZIF-8 serves as a precursor and is heated together with cadmium chloride, Zn in ZIF-8 can be volatilized at high temperature, Zn in ZIF-8 is replaced by cadmium chloride in the high-temperature process, cadmium (II) is reduced into elemental cadmium (Cd) steam by carbon generated by pyrolysis, and the elemental cadmium (Cd) steam leaves a reaction system; and finally, the catalyst (Zn DACs / N-C) with an excellent ORR performance and a zinc diatom structure is synthesized, and is expected to become a catalyst in fuel cell cathode reaction, automobile exhaust removal and organic reaction.

The invention belongs to the technical field of fuel cells, and particularly relates to a high-power closed cathode air-cooled fuel cell metal bipolar plate, an electric pile, a system and a design method.The metal bipolar plate specifically comprises an anode plate, a cooling plate and a cathode plate which are arranged in an upper-layer structure, a middle-layer structure and a lower-layer structure; a plurality of anode runners for anode fuel gas to flow are arranged in the anode plate; a plurality of cathode runners for cathode reaction air to flow are arranged in the cathode plate; a plurality of cooling straight flow channels for cooling gas to flow are formed in the cooling plate; the effects of high power density and low cathode voltage of the fuel cell are achieved by a regionalized metal bipolar plate configuration, and the problems of high parasitic power consumption and the like of an air compressor caused by low power density and large cathode voltage drop of the fuel cell under a high-power working condition in the prior art are effectively solved.

This invention proposes a three-dimensional electrode electrochemical device with descaling function. It is divided into a softening chamber and an oxidation chamber by a partition. The softening chamber contains multiple cylindrical electrode groups. Under the action of an external electric field, the cathode reaction generates a strongly alkaline environment to precipitate scale-forming ions in the water. A gas flushing mechanism and an external programmable DC regulated power supply effectively achieve automatic descaling. The three-dimensional electrode group in the oxidation chamber consists of several anode plates and cathode plates arranged alternately at equal intervals. Insulating baskets filled with particle packing are placed between adjacent electrode plates. Ultrasonic vibrating plates are integrated around the three-dimensional electrode group. A porous sieve plate and aeration pipeline are installed at the bottom of the three-dimensional electrode group. A spray mechanism with rotating nozzles is installed at the top of the oxidation chamber. The combination of the three-dimensional electrode group, ultrasonic assistance, and circulating spray enhances the oxidation efficiency. This invention removes multiple pollutants from water simultaneously and efficiently in a single reactor without the need for external reagents, through a series of electrochemical reactions. It has the advantages of high treatment efficiency, high automation, and small footprint.

The invention belongs to the technical field of seawater pretreatment, and discloses a seawater pretreatment device and a method for pretreating seawater by using the seawater pretreatment device, the device comprises an electrochemical reaction device, the electrochemical reaction device comprises a cathode reaction tank, an anode reaction tank and a barrier for separating the cathode reaction tank from the anode reaction tank; a cathode is arranged in the cathode reaction tank, and an anode is arranged in the anode reaction tank; the cathode has a surface structure and / or surface characteristics that are easy for bubble detachment. The electrochemical reaction device of the seawater pretreatment device effectively inhibits electrode scaling through the design of a cathode structure and regulation and control of reaction parameters, so that long-acting and stable operation of an electrochemical and air flotation coupling process is ensured, the seawater pretreatment device not only undertakes an agent-free seawater softening function, but also shares part of algae removal load, and the seawater pretreatment effect is improved. And the air floatation effect can be enhanced through suspended calcium and magnesium particles and bubbles generated by electrochemical reaction, so that algae and hardness in seawater can be efficiently and synergistically removed.

Disclosed methods relate to producing an aluminum-scandium (Al—Sc) alloy. A method can include providing an electrolyte bath comprising a first portion of at least one of ScF3 or AlF3 and a first portion of at least one of LiF, NaF, or KF; providing a cathode in electrical contact with the electrolyte bath; providing an anode in electrical contact with the electrolyte bath; adding a first portion of Sc2O3 into the electrolyte bath; reacting an aluminum ion with the cathode; applying an electric current to the cathode, thereby reacting a scandium ion with the cathode to produce the Al—Sc alloy.

The invention belongs to the technical field of fuel cell cathode reaction oxygen reduction electrocatalysts, and particularly relates to a preparation method and application of an Agx / Co3-xO4 compound. Cobalt salt and silver salt are used as metal sources, citric acid is used as a complexing agent, a rheological phase reaction is adopted, a precursor complex is prepared through the steps of drying, foaming and the like, and then the electrocatalyst is prepared through muffle furnace heat treatment. A rheological phase method is used for promoting complexing of metal salt and citric acid. A small amount of reducing carbon generated during high-temperature pyrolysis of citric acid enables Ag < + > which should be doped in Co position in Co3O4 to be synchronously reduced into elemental Ag instead of being doped in crystal lattices, so that the Agx / Co3-xO4 compound with a special structure is obtained. Compared with a uniform mixture of common elementary substance Ag and Co3O4, the Agx / Co3-xO4 compound similar to in-situ growth prepared by the method has better ORR catalytic activity, and is expected to provide a new thought for preparing other metal element compounds, so that the requirement of energy equipment on a high-performance ORR electrocatalyst is met.

This invention relates to the fields of environmental engineering and pollution remediation technology, and in particular to a bioelectrochemical system for the remediation and fixation of heavy metal pollution in groundwater and its application. The bioelectrochemical system employs an integrated columnar layered structure simulating vertical seepage of groundwater, comprising, from bottom to top: a groundwater inlet zone, a first transition support layer, an anodic reaction zone, an intermediate isolation layer, and a cathodic reaction zone. Electroactive microorganisms in the anodic zone oxidize organic matter, releasing electrons. These electrons are transferred to the cathode via an external circuit, driving the reduction of heavy metal ions (such as Cr(VI)) to a lower valence state, while pyrite releases Fe. 2+ Biochar promotes precipitation by enhancing fixation through adsorption and electron shuttle. This bioelectrochemical system enables continuous in-situ remediation of groundwater, achieving a Cr(VI) removal rate of up to 92.7%, while simultaneously removing organic matter and nitrogen and phosphorus pollutants. It exhibits stable long-term operation with a low risk of heavy metal re-release, requires no large amounts of chemical reagents or external power supply, and has low operating costs.

This invention relates to an electrolysis system for electrolyzing carbon dioxide, comprising an electrolyzer, a water circuit unit, a gas circuit unit, and an electrical control unit. Its key technical features are: the reaction temperature is below 100°C; the water circuit unit provides water to the electrolyzer as the anode reactant, and separates, collects, or discharges the product oxygen, recycling excess reactant water; the gas circuit unit provides carbon dioxide to the electrolyzer as the cathode reactant, monitors the composition of the product carbon monoxide, separates and collects the product carbon monoxide, and recycles excess reactant carbon dioxide. This invention can efficiently and stably electrolyze carbon dioxide to carbon monoxide, separating water vapor and simultaneously separating and recycling unreacted carbon dioxide. It is easily integrated with downstream Fischer-Tropsch synthesis processes, solving the problems of rapid efficiency decay, unstable system operation, complex product handling, and low coupling with downstream processes in existing carbon dioxide electrolysis to carbon monoxide technology.

The invention discloses a system for repairing underground water by utilizing a microalgae microbial fuel cell, the system comprises an anode module, a cathode module and a pumping module, the anode module comprises an anode reactor, a first electrode and a velvet net, the cathode module comprises a cathode reactor and a second electrode, and the pumping module is connected with the first electrode and the second electrode. The pumping module comprises a first peristaltic pump, a second peristaltic pump and a third peristaltic pump, a first electrode is arranged in the anode reactor, the surface of the first electrode is wrapped with a velvet net, a second electrode is arranged in the cathode reactor, and the first electrode and the second electrode are connected through a metal wire. According to the invention, the microalgae microbial fuel cell is directly placed in the to-be-repaired underground water in situ, so that the remediation efficiency of the underground water is improved by utilizing microalgae microorganisms, and meanwhile, the traditional aeration oxygen supply is replaced by microalgae photosynthesis, so that the power generation performance of the microbial fuel cell is improved, and the energy consumption is reduced; and the process cost of the microbial fuel cell is reduced based on the biochemical characteristics of the microalgae.

The present invention provides a modular microbial electricity-producing coupled photo / electrocatalytic energy-saving wastewater treatment system with an adjustable water level and an aeration-free cathode. The system inlet is industrial wastewater, which flows into the reactor from the bottom water inlet via a peristaltic pump, passes through the microbial anode chamber, a sand insulation layer, and an upper cathode chamber, and then flows out. Carbon rods are used as conductive media between the cathode and the anode. Filter cloths are used to isolate the various parts. When the wastewater flows out of the cathode area, it flows out in a tidal manner. When the cathode is located above the water layer, an air cathode is formed, which reduces the need for aeration, can meet the oxygen required for the cathode reaction, and save the electricity required for additional aeration. This reactor setting can not only reduce the footprint, but also utilize the ability of microorganisms to transform pollutants and generate electricity, coupled with the photoelectric response and catalytic ability of the cathode nanocatalyst, to improve the coupling system's ability to remove COD, TN, TOC, etc. in industrial wastewater.

An integrated device for electrocatalytic reduction of carbon dioxide / carbon monoxide relates to the technical field of energy catalysis and comprises a reactor module, a gas-liquid passage module, an electrolyte passage module, a temperature control liquid passage module, a reaction circuit module and a control module. The reactor module comprises a cathode temperature control plate, a cathode plate, a membrane electrode, an anode plate and an anode temperature control plate; the gas-liquid passage module is used for providing raw material gas with adjustable temperature and humidity for a cathode reaction runner of the reactor module and outputting a reaction product; the electrolyte path module enables electrolyte to circulate in the anode reaction flow channel; the temperature control liquid passage module is used for controlling the temperature of the reactor module and the electrolyte storage tank; the reaction circuit module provides electric energy for the reactor module; and the control module is used for integrally controlling each module, monitoring the state of the device and recording operation data. The utility model has the advantages of larger scale, integrated control, more convenience in use, more controllable parameters, higher safety and the like.

The invention discloses a method for correcting a potentiodynamic scanning curve and quantifying the deviation degree based on an attachment layer recessive ohmic resistance influence, and belongs to the technical field of conductive component nondestructive testing. Obtaining an experimental potential-current curve of the to-be-tested component through potentiodynamic scanning; constructing a potentiodynamic scanning equation for comprehensively representing the implicit ohmic resistance influence introduced by a cathode reaction, an anode reaction and a component surface attachment layer; fitting the equation with an experimental curve, and optimizing model parameters to enable the equation to be matched with the experimental curve, so as to extract numerical values of all parameters in the electrokinetic potential scanning equation from a fitting result; substituting the parameters back to a potentiodynamic scanning equation and removing the influence of an attachment layer to obtain a corrected curve and accurately calculating the polarization resistance of the component; and comparing the curves before and after correction so as to peel off the influence of the invisible ohmic resistance brought by the attachment layer on the dynamic potential scanning result. According to the invention, the corrosion condition of the conductive material can be rapidly, accurately and nondestructively evaluated.

This invention discloses a microbial fuel cell reactor device resembling an anaerobic / aerobic membrane bioreactor. The device includes an influent system, an effluent system, a main body of the microbial fuel cell reactor, and an energy data acquisition system. The main body of the microbial fuel cell reactor internally comprises an anaerobic anode reaction chamber, an intermediate baffle zone, and an aerobic cathode reaction chamber. The anaerobic anode reaction chamber operates in a plug-flow mode and contains anaerobic sludge and carbon brushes. The intermediate baffle zone isolates the anaerobic anode reaction chamber from the aerobic cathode reaction chamber via left and right plates, respectively, and uses pebbles at the bottom to replace the function of the semi-permeable membrane in traditional microbial fuel cells. The aerobic cathode reaction chamber employs a suspended-rotating biocathode and incorporates a hollow fiber membrane module, operating in a completely mixed mode. This invention has the advantages of low cost, simple and easily scalable structure, strong long-term operational stability, high power generation efficiency, and strong wastewater treatment capacity.

The invention provides a closed air-cooled metal bipolar plate, which belongs to the field of fuel cells and comprises a metal cathode plate, a metal anode plate, a support gasket and an air cooling plate. The supporting gaskets and the air cooling plates are welded between the metal cathode plates and the metal anode plates to form three independent cavities of the bipolar plate. The three independent cavities comprise an anode reaction gas cavity, a cooling cavity and a cathode reaction gas cavity; and each chamber is provided with a special flow channel structure, so that reactants and cooling media are uniformly distributed in the respective chambers, and the reaction requirements of the respective chambers are met. Air is adopted as a cooling medium, the special sealing structure is beneficial to keeping the three cavities of the air-cooled bipolar plate mutually independent, the design form of the gas flow channel on the bipolar plate simplifies the complex structure of the traditional closed air-cooled fuel cell bipolar plate, the flow resistance is reduced, the sealing reliability is improved, and meanwhile, the bipolar plate is lighter.

The invention discloses a cathode structure for a circulating water electrochemical treatment device and the circulating water electrochemical treatment device, the cathode structure comprises a bottom-layer connecting rod, a plurality of surface-layer cathodes, a plurality of bottom-layer cathodes and a scraper assembly, the plurality of surface-layer cathodes form a second cathode layer, and the second cathode layer and a first cathode layer formed by the plurality of bottom-layer cathodes are arranged in a front-back staggered manner; the scraper assembly covers the second cathode layer. By changing the structure of the cathode, under the condition that the reaction area of the cathode is not changed, the distance of a bubble rising section is shortened to reduce bubble aggregation and change a bubble separation path, the bubbles are separated from the cathode more easily, the actual contact area of ions in a solution and the cathode is increased, the negative influence caused by bubble aggregation is effectively weakened, and the stability of the cathode is improved. The capacity of the solution flowing to the surfaces of the cathodes is enhanced, the electrochemical water softening efficiency is improved, the electric energy consumption of electrolyzed water is reduced, and the descaling work of the front cathode and the rear cathode can be completed through the unique structural design.

The invention belongs to the technical field of electro-catalysis, and discloses a method and device for preparing ethylene oxide through cathode and anode coupling electro-catalysis, and the method comprises the following steps: obtaining an electrolyte containing hydrogen peroxide in a cathode electrolytic cell; feeding the electrolyte containing hydrogen peroxide into a cathode reaction tank; electrolyte containing potassium hypobromite is obtained in an anode electrolytic cell; feeding the electrolyte containing potassium hypobromite into an anode reaction tank; in a cathode reaction tank, obtaining a reaction solution containing ethylene oxide; feeding the reaction liquid containing ethylene oxide into a reaction liquid flow mixing tank; in an anode reaction tank, obtaining a reaction solution containing a bromoalcohol intermediate; feeding the reaction liquid containing the bromoalcohol intermediate into a reaction liquid flow mixing tank; carrying out saponification reaction on the bromo-alcohol intermediate in the mixed flow tank; and after the saponification reaction is finished, carrying out reduced pressure distillation on the mixed solution to separate out ethylene oxide gas, and respectively feeding the liquid into an external catholyte tank and an external anolyte tank. The method improves the energy utilization rate.

The application discloses a method for electrochemically separating organic acid and alkali, wherein an organic acid salt solution to be separated is introduced into a central chamber of an assembled porous solid electrolyte reactor, a cathode reactant is introduced into a cathode chamber, an anode reactant is introduced into an anode chamber, and electrolysis is performed, so that finally the organic acid is obtained in the central chamber, and the alkali is recovered in the cathode, and the separation of the organic acid and the alkali is completed. The application has universality for obtaining organic acids by separating various organic acid salts, is green in production process, low in reaction energy consumption, and simple in separation steps.

The application discloses a method for electrocatalytic preparation of arsine by taking grey arsenic as an arsenic source, and the method comprises the following steps: taking a PdFe bimetallic alloy nanoparticle electrode loaded on a nickel foil as a working cathode, setting an anode as a counter electrode, taking grey arsenic as an arsenic source, catalytically reducing the grey arsenic in an alkaline electrolyte by a constant current electrolysis method, and obtaining arsine. In a wide current density range, the method can realize efficient synthesis of arsine, and the method takes common and easily obtained grey arsenic as the arsenic source, takes a PdFe / NF electrode prepared by electrodepositing in a simple manner as a catalytic working cathode, and has mild reaction conditions, and the method does not need high temperature and high pressure and a chemical reducing agent, and the electrocatalyst can be repeatedly used, so that the method provides a green, safe and efficient method for synthesis of arsine.

The invention discloses a method for preparing glycollic acid by electrocatalytic reduction of oxalic acid, which comprises the following steps: preparing an acid aqueous solution with the concentration of 0.05-0.5 mol / L as an electrolyte, dividing the acid aqueous solution into two parts, adding oxalic acid into the first part of electrolyte, and preparing a solution with the final oxalic acid concentration of 0.05-0.2 mol / L as a cathode reaction solution; the electrolyte of the second part is an anode reaction solution; dividing the H-type electrolytic tank into a cathode chamber and an anode chamber by using a proton exchange membrane, and respectively adding a cathode reaction solution and an anode reaction solution into the cathode chamber and the anode chamber; the cathode and anode reaction solutions are equal in volume; the carbon cloth electrode loaded with the metal Bi serves as a cathode electrode, a platinum sheet electrode serves as an anode electrode, after the electrolytic tank is assembled, constant-current electrolysis is conducted, and glycollic acid is obtained.The carbon cloth electrode loaded with the metal Bi serves as a catalyst to conduct electrocatalytic reduction on oxalic acid, reaction conditions are mild, the operation process is convenient and simple, side reactions are few, and the method is environmentally friendly; the selectivity and the additional value are high.

An amide-containing aromatic diamine has the following structural formula: where Ar is a group with an aromatic ring structure. The preparation method includes the following steps: (1) mixing and reacting components including aromatic diamine, p-nitrobenzoic acid, alkyl phosphoric anhydride and polar aprotic organic solvent; (2) adding carboxylic acid and halogen-free quaternary ammonium salt to the product obtained in step (1) to obtain a mixed solution, which is placed in the cathode cell of an H-type electrolytic cell; the anode cell and the cathode cell are separated by a Nafion membrane; adding the same polar aprotic organic solvent and halogen-free organic electrolyte as the cathode cell to the anode cell of the H-type electrolytic cell, and adding a metal ion-free reducing agent; and conducting the reaction by electrolysis; (3) purifying the cathode reaction solution obtained in step (2) by post-treatment to obtain the amide-containing aromatic diamine. The yield, purity and whiteness of the amide-containing aromatic diamine are higher.

The utility model discloses an electrochemical water treatment device for coupling porous titanium black oxidation with cathode oxygen reduction. Comprising a box body, a water inlet, a water inlet storage tank, a porous water distribution plate, a sintered porous titanium black anode, a porous cathode, an overflow water outlet tank, a water outlet, a return pipe, a gas-liquid mixing pump, a gas-liquid mixing main conveying pipe, a gas-liquid mixing conveying branch pipe and a microbubble generator. By adopting the mode, the electrochemical water treatment device for coupling porous titanium black oxidation with cathode oxygen reduction has the advantages that in the electrochemical water treatment process, the oxygen content in wastewater is increased by utilizing microbubble aeration, and the cathode reaction potential can be greatly reduced by utilizing a cathode oxygen reduction reaction to replace a water decomposition hydrogen production reaction; wastewater penetrates through the porous electrode to compress the mass transfer distance of pollutants diffused to the surface of the electrode, so that the overall pollutant degradation capacity of the device is improved, and the water treatment energy consumption of the system is reduced.

The invention discloses a method for electrosynthesizing hydrogen peroxide by coupling anode aldehyde oxidation hydrogen production with cathode oxygen reduction, which comprises the following steps: in an electrosynthesis device provided with an anode reaction chamber and a cathode reaction chamber, adding an alkaline electrolyte containing an aldehyde group substance into an electrolytic tank, and carrying out electrocatalytic oxidation reaction at lower voltage. And electrolyte is introduced into the cathode reaction chamber, oxygen is introduced at the same time, and the reaction of oxygen reduction electrosynthesis of hydrogen peroxide is carried out. The anode reaction chamber and the cathode reaction chamber are separated by a polymer ion exchange membrane, and a fuel cell system capable of outputting electric energy is formed by anode low-potential oxidation and cathode oxygen reduction reaction. According to the invention, a reaction substrate containing an aldehyde group is subjected to high-selectivity and high-yield electrocatalytic oxidation at a low voltage into a carboxylic acid compound with a high additional value and generates hydrogen, the cathode synthesizes hydrogen peroxide through an oxygen reduction reaction, and chemicals with high additional values are generated at both the cathode and the anode of the electrocatalytic device; meanwhile, electric energy can be generated.

The invention relates to a low-impedance electrolysis cell and an electrolysis cell device of a double-layer gas-liquid decoupling runner, the electrolysis cell comprises a cathode reaction electrode, an anode reaction electrode and a diaphragm arranged between the cathode reaction electrode and the anode reaction electrode, and a cathode side porous bipolar plate and an anode side porous bipolar plate are respectively arranged on two sides of the reaction electrodes. One side, deviating from the reaction electrode, of each porous bipolar plate is provided with a sunken concave area through machining, the sides, deviating from the reaction electrode, of the cathode side porous bipolar plate and the anode side porous bipolar plate are further provided with outer side main gas chambers, and pores are formed in the cathode side porous bipolar plate and the anode side porous bipolar plate in a penetrating manner. The bubble discharging efficiency is remarkably improved, the ohmic resistance of an electrolytic reaction area is reduced, and therefore the comprehensive performance of the electrolytic bath is greatly improved, and the service life of the electrolytic bath is greatly prolonged.

A device for preparing tetravalent uranium through electrolysis comprises an electrolytic bath, the electrolytic bath comprises a small electrolysis chamber and a platinum-plated titanium mesh, the small electrolysis chamber is made of a titanium plate and serves as a cathode, and the platinum-plated titanium mesh serves as an anode; a feed liquid inlet and a feed liquid outlet are formed in the small electrolysis chamber. A plurality of small electrolysis chambers are connected in series in the electrolytic bath, and a platinum-plated titanium mesh is mounted in each small electrolysis chamber. According to the invention, the electron generation rate is increased by increasing the reaction area of the cathode on the premise that the current density is not changed, so that the preparation amount of each electrolytic cell is increased, the rear-end requirement can be met by only adopting one electrolytic cell, and the cost of preparing a tetravalent uranium product by the electrolytic cell is reduced.

The invention discloses a waste heat circulation type hydrogen fuel cell power generation system, and belongs to the technical field of fuel cells. According to the power generation system, a stacked electric pile structure is adopted, and waste heat generated by an electric pile is recycled through an air cooling or liquid cooling heat dissipation module; according to the air cooling scheme, air is blown into an air cooling air outlet gas collecting pipeline through an electric pile heat dissipation hole by a fan, and the heated air serves as cathode reaction gas to be input into the electric pile again through a waste heat recycling pipeline; according to the liquid cooling scheme, heat of cooling liquid is converted into hot air to be supplied to a cathode through a heat exchange radiator, the system is provided with an automatic control valve capable of being controlled in a partitioned mode, and independent temperature control over different areas of the galvanic pile is achieved. In addition, thermal expansion and cold contraction stress is relieved through the design of the elastically-installed second pressing plate. According to the invention, the temperature difference between cathode and anode gases is obviously reduced by waste heat circulation, the output power and carbon monoxide tolerance of the galvanic pile are improved, the configuration of an additional preheating device is avoided, and the device has the advantages of good temperature uniformity, high energy utilization rate, reliable structure and the like.