547results about "Electrode shape/forms" patented technology

The invention relates to a composite electrode material of an A-C core-shell structure, and belongs to the technical field of electrode materials. In the core-shell structure composite electrode material, A is any one element, two elements, three elements, four elements or five elements selected from Mn, Ni, Co, Fe, Cu, Zn, Ru, Pd and Rh; c is RE < x > Ce < 1-x > O < 2 >, and RE is any one element or two elements selected from La, Pr, Nd, Sm and Gd; x is the mole fraction of RE. By improving the interaction between the oxide and the core multi-component alloy and the synergistic effect between the elements, the structural stability and the carbon deposition resistance of the electrode material under the high-temperature condition are remarkably enhanced.

The invention discloses a method for preparing a high-performance AEM water-electrolyzed hydrogen production membrane electrode, which comprises the following steps: respectively preparing an AEM water-electrolyzed hydrogen production anode and an AEM water-electrolyzed hydrogen production membrane cathode, then placing the AEM water-electrolyzed hydrogen production anode and the AEM water-electrolyzed hydrogen production cathode on two sides of an anion exchange membrane, and sealing edges to prepare the AEM water-electrolyzed hydrogen production membrane electrode, the preparation method comprises the following steps: mixing catalyst powder with a solvent to prepare catalyst prefabricated slurry, adding an anion exchange resin solution in batches, adding a hydrophobic binder to prepare catalyst slurry, coating the surface of a hydrophobic modified diffusion layer with the slurry, and finally coating the surface of the diffusion layer with the anion exchange resin solution to prepare the hydrophobic modified diffusion layer. And soaking in an organic solvent, and washing. According to the prepared AEM water electrolysis hydrogen production membrane electrode, on the basis that oxygen bubble retention can be reduced, the stability is improved, and meanwhile the activity of the membrane electrode is improved.

The invention belongs to the field of PET (polyethylene glycol terephthalate) plastic waste treatment, and particularly relates to preparation of a copper oxide-nickel hydroxide core-shell structure catalytic material and application of the copper oxide-nickel hydroxide core-shell structure catalytic material to preparation of high-added-value formic acid by upgrading electro-catalysis PET plastics, and the preparation method comprises the following steps: (1) placing a copper conductive substrate in an alkali etching mixed solution for alkali etching treatment, obtaining a conductive substrate on which a Cu (OH) 2 precursor grows; (2) placing the conductive substrate on which the Cu (OH) 2 precursor grows in a muffle furnace for heat treatment to obtain a conductive substrate on which CuO nanowires grow; and (3) placing the conductive substrate on which the CuO nanowire grows in a hydrothermal kettle, and obtaining the CuO-coated Ni (OH) 2-x core-shell structure catalyst through a hydrothermal method.

To provide a fuel cell that can be constructed thinly while ensuring sufficient thickness of the gas diffusion layer. [Solution] A fuel cell cell that generates electricity by the reaction of a reaction gas comprises a membrane electrode assembly having an electrolyte membrane and a catalyst layer, a gas diffusion layer laminated on the membrane electrode assembly and made of a porous metal, and a separator laminated on the gas diffusion layer and parallel to the plane direction of the membrane electrode assembly, wherein the gas diffusion layer has grooves through which the reaction gas flows on the separator side.

The invention discloses an anion exchange membrane electrode and a preparation method and application thereof, and belongs to the technical field of new energy material and catalytic electrode preparation, the method comprises the following steps: S1, preparing an anode catalyst slurry comprising a hydrophobic covalent organic framework material, an anode catalyst, an anion exchange ionomer and a solvent; s2, preparing a cathode catalyst slurry of which the components comprise a cathode catalyst, an anion exchange ionomer and a solvent; and S3, respectively spraying or coating the anode catalyst slurry and the cathode catalyst slurry on two side surfaces of an anion exchange membrane or a gas diffusion layer, and carrying out heat treatment to obtain the anion exchange membrane electrode. The method provided by the invention can solve the problems of large gas-liquid-ion three-phase mass transfer resistance, easy shielding of active catalytic sites by ionomers and unbalanced water management in the membrane electrode assembly in the existing AEMWE device.

The present invention relates to an electrode for electrolysis, a laminate, a wound body, an electrolyzer, a method for producing an electrolyzer, a method for renewing an electrode, a method for renewing a laminate, and a method for producing a wound body. An electrode for electrolysis according to one aspect of the present invention has a mass per unit area of 48 mg / cm2 or less and a force applied per unit mass-unit area of 0.08 N / mg·cm2 or more.

The invention relates to an oxygen evolution catalyst for hydrogen production through electrolysis of proton exchange membrane water, a membrane electrode and a preparation method of the membrane electrode, and the oxygen evolution catalyst is iridium oxide in a nanoparticle form and contains 2-2.5% of crystal water; the preparation method of the catalyst comprises the following steps: carrying out ultrasonic treatment on an iridium salt solution, mixing the iridium salt solution with magnesium sulfate and water, carrying out ultrasonic treatment, volatilizing a solvent, drying, carrying out ball milling to obtain powder, carrying out high-temperature calcination, dissolving with dilute acid, carrying out suction filtration with water and ethanol until the conductivity is less than 10 [mu] s / cm, carrying out vacuum drying to remove moisture, and grinding to obtain the catalyst. The membrane electrode comprises the catalyst powder prepared by the method and an anode catalyst layer formed by perfluorinated sulfonic acid resin; and the cathode catalyst layer is formed by Pt / C and perfluorosulfonic acid resin. The oxygen evolution catalyst provided by the invention has high activity and high stability, magnesium sulfate is adopted in the preparation method, and the oxygen evolution catalyst has the advantages of simple operation, low cost and the like.

The invention belongs to the technical field of chemical equipment, and discloses an electrolytic water membrane electrode and a preparation method thereof.The preparation method comprises the steps that a catalyst is electrically deposited on the surface of a substrate material, and a self-supporting electrode is obtained; preparing a first anionic membrane solution and a second anionic membrane solution by utilizing the functionalized polyaryl piperidine polymer and a polar solvent; and spraying the first anionic membrane solution on the surface of the self-supporting electrode, drying for the first time, smearing the second anionic membrane solution again by adopting the coating method, and drying for the second time to obtain the cathode side or anode side electrolytic water membrane electrode. Through an in-situ coating technology, the surface of the self-supporting electrode is directly covered with the anionic membrane solution, the surface microstructure of the self-supporting electrode is uneven, the anionic membrane solution can permeate into the pores, the anionic membrane and the electrode are tightly combined, ion transmission at the electrode / membrane interface is remarkably improved, and the self-supporting electrode is more stable in performance. Therefore, the electrolytic bath performance of the membrane electrode assembly under the condition that pure water serves as electrolyte is improved.

The invention relates to the technical field of hydrogen production by electrolyzing water, and provides a preparation method of anode catalyst slurry of PEM electrolyzed water, slurry and a catalytic layer.The preparation method comprises the steps that S1, an anode catalyst, a first ionomer and a first solvent are mixed and dispersed, and first catalyst slurry is obtained; s2, mixing and dispersing a dehydrogenation catalyst, a second ionomer and a second solvent to obtain second catalyst slurry; the dehydrogenation catalyst is a carbon-supported noble metal catalyst; and S3, mixing the first catalyst slurry and the second catalyst slurry, and carrying out homogenization treatment to obtain the anode catalyst slurry. The method has the advantages that the effects of improving uniformity, improving mass transfer and reducing hydrogen in oxygen are achieved at the same time through the cooperative arrangement of the adding of the hydrogen elimination additive, the slurry preparation process steps and the like, and the performance and the safety of the membrane electrode are improved.

The invention relates to an electrochemical cell (1), in particular an electrochemical cell (1) for binding carbon dioxide (CO2), having a layered structure with a first electrode (2) and a second electrode (3), wherein the first electrode (2) forms a cathode and has a surface (4) that can be brought into contact with a gas or gas mixture, and wherein the second electrode (3) forms an anode for releasing electrons. According to the invention, at least the first electrode (2) has, for the formation of a varying height profile, selectively introduced depressions (6) and / or selectively shaped protrusions (5) in the region of at least one surface, preferably in the region of the surface (4) that can be brought into contact with the gas or gas mixture. Furthermore, the invention relates to a method for producing an electrode (2, 3) for an electrochemical cell (1).

To provide an electrolytic device with excellent electrolysis efficiency. [Solution] According to the embodiment, an electrolytic device is provided comprising: a cathode for reducing a target to reduce and producing a reduction product; an anode for oxidizing a target to oxidize and producing an oxidation product; an electrolyte layer located between the cathode and the anode, containing at least one of the group consisting of a heat-resistant polymer, a solid acid, a solid salt, and a molten salt; and an electrolyte layer having a first ion-conducting material; and at least one of the two locations between the cathode and the electrolyte layer, or between the anode and the electrolyte layer, comprising: a porous material; and a control layer on which a second ion-conducting material is supported in at least a portion of the pores of the porous material; wherein the area of ​​the second ion-conducting material on the cathode side and / or anode side surface of the control layer is A, and the area on the electrolyte layer side surface of the control layer is B, such that 0 ≤ A ≤ B.

The present application relates to the technical field of electrochemical process, and especially relates to an electrochemical treatment method and device.The electrochemical treatment method comprises the following steps: A1) performing lamination on a conductive electrode, and applying an electrochemical signal; B1) processing a to-be-processed substance by making the to-be-processed substance flow through the conductive electrode processed in step A1), to obtain a processed substance; or A2) performing lamination on a conductive electrode, and placing a to-be-processed substance in the conductive electrode after lamination; B2) applying an electrochemical signal to process, to obtain a processed substance.The treatment method provided by the present application can obtain a product with better stability.

The invention relates to a method for producing an electrochemical cell (1), in particular for binding carbon dioxide (CO2), comprising a first electrode (2) and a second electrode (3), which are separated by a membrane (4). According to the invention, during the production of the first electrode (2) and / or the second electrode (3), at least one layer of an electrode material is applied to the membrane (4) in an additive manufacturing process, and at least one cavity (5, 6) is formed during the application of the electrode material.

The present application relates to a kind of jet electrolytic cell device and method for preparing rare earth compound by continuous electrotransformation, belong to the field of rare earth compound preparation.Jet electrolytic cell device includes: anode chamber, cathode chamber, cation exchange membrane, jet device and DC power supply device, wherein cation exchange membrane divides tank into anode chamber and cathode chamber, anode chamber is connected with DC power supply positive pole, cathode chamber is connected with DC power supply negative pole, cathode chamber and anode chamber adopt asymmetric structure.Jet device includes jet port and gas distribution plate, jet port is located at the bottom center of cathode chamber, gas distribution plate is arranged on the upper portion of jet port, gas distribution plate reduces the bubble diameter of gas entering cathode chamber, realizes bubble micro-fining, without additional stirring device;Compared with existing electrolytic cell device, the electrolytic energy consumption of preparing unit output rare earth compound is lower, and reaction gas utilization efficiency is higher.

An electrolyzer system and an end plate assembl (110) are provided with one or more fluid-isolating inserts (400). The electrolyzer system includes a stack of electrolyzer cells, a current collector, an end plate assembly, and an isolation plate positioned between the end plate assembly (1109 and current collector. The end plate assembly (110) includes at least one fluid channel to allow fluid to pass therethrough, where the fluid channel(s) is in fluid communication with at least one fluid channel through the current collector and isolation plate. The end plate assembly (110) includes an end plate (120) and an fluid-isolating insert (400) residing, at least in part, within a pocket in the end plate (110). The fluid-isolating insert (400) includes at least one electrically-isolating fluid channel (401) that defines, at least in part, the fluid channel(s) of the end plate assembly (110), where the fluid-isolating insert (400) increases an effective length of a fluid conduction path between the current collector and the end plate (110).

To provide a photocatalyst cell capable of suppressing oxidation of a reduction product in an electrolytic solution by oxygen gas.SOLUTION: The photocatalyst cell is provided so as to be tilted at an angle of not less than 5 ° but not more than 45 ° with respect to a horizontal plane. The photocatalytic cell includes a translucent member, an electrolytic solution, a photocatalytic sheet containing photocatalytic particles, an injection port through which the electrolytic solution is injected into the photocatalytic cell, a discharge port through which the electrolytic solution is discharged to the outside of the photocatalytic cell, and an exhaust port through which gas inside the photocatalytic cell is discharged. the exhaust port is located higher than the injection port, and a gap between surfaces of the translucent member and the photocatalytic sheet is equal to or larger than 5mm and equal to or smaller than 50mm. The inlet and the outlet are provided so that the electrolytic solution flows from the upper part to the lower part in the gap between the translucent member and the photocatalyst sheet.SELECTED DRAWING: Figure 1

The application discloses a kind of nanorod-shaped K2Ti8O 17 Catalyst and its preparation method and application, comprising the following steps: K2Ti8O 17 Nanowire is broken to obtain nanorod-shaped K2Ti8O 17 Mixed with IrCl3·3H2O and solvent to obtain dispersion suspension, after adding reducing agent reaction, nanorod-shaped K2Ti88 loaded with Ir is obtained 17 Intermediate material is placed in the oxygen environment of 250-550 DEG C and is reacted to obtain nanorod-shaped K2Ti8O 17 Catalyst loaded with IrO2 nanoparticles on the surface of nanorod-shaped K2Ti8O 17 The uniformity of the catalyst loaded on the carrier is high, the particle size is small, there is no agglomeration phenomenon, the catalyst morphology is regular, and the catalyst has good acidic OER catalytic performance; the preparation method is simple, the cost is low, the controllability is good, the result repeatability is high, and industrial production is easy to realize.

The present disclosure relates to an apparatus for non-contact processing on a ribbon-like article (N). The apparatus comprises a conveying device of the ribbon-like article (N) including an inlet section (11), an outlet section (12) and a connecting segment (13) extending between the inlet section (11) and the outlet section (12) and at least two operating units (2) configured to perform non-contacting processing on the ribbon-like article (N) that are movable along a loop path (3). The conveying device (1) is configured to advance the ribbon-like article (N) at a feed rate along the connecting segment. The operating units (2) are configured to displace at a first speed along a processing portion (31) of the loop path. The speed difference between the first speed and the feed rate is lower than a predetermined value.

The invention discloses a guide plate net, an electrolytic tank and a hydrogen production system, and belongs to the technical field of electrolytic hydrogen production. An alkali liquor inlet and a gas outlet are formed in the two ends, in the first direction, of the flow guide plate net respectively, a first flow guide channel and a second flow guide channel are arranged on the flow guide plate net, the first flow guide channel is arranged along the edge of the outer contour of the flow guide plate net, and the second flow guide channel extends in the direction of the central axis of the flow guide plate net. The low-temperature electrolyte entering the alkali liquor inlet flows to the edge and the center of the flow guide plate net along a specific path under the shunting action of the first flow blocking net and the second flow blocking net, so that the temperature uniformity of the center and the edge is improved, and the situation that the temperature of the center is low and the temperature of the edge is too high due to the fact that the electrolyte directly flows to the center is prevented; the temperature of the area where the sealing ring is arranged at the edge is reduced, so that the sealing ring is prevented from losing efficacy due to overheating, the liquid leakage risk is reduced, and normal electrolytic reaction is prevented from being affected.

The invention provides a preparation method of an efficient mass transfer anti-precipitation sea water hydrogen production electrode constructed by femtosecond laser, and relates to the technical field of sea water electrolysis hydrogen production. The method comprises the following steps: carrying out substrate pretreatment on a conductive substrate, periodically preparing a hump microstructure on the surface of the pretreated conductive substrate by adopting a femtosecond laser direct writing technology, and loading a catalytic activity layer on the surface of the hump microstructure substrate to form an integrated electrode. According to the integrated electrode, the catalytic activity and the mass transfer efficiency can be improved under the seawater electrolysis condition, magnesium-calcium precipitation coverage is inhibited, and collaborative optimization of efficient hydrogen production and electrode stability is achieved.

Hydrogenation reactions are catalyzed by driving charged particles (e.g., an electric current or particle beam) into and / or through a catalytic material so as to deliver energy for hydrogenation of one or more compounds chemisorbed by the catalytic material. The energy provided by the charged particles may be adjusted (e.g., based on a measured temperature and / or pressure associated with the reaction) to maintain a desired reaction temperature and / or prevent overheating of the reaction. In one example, hydrogen loading of the catalytic material (e.g., via electrolysis) enhances reaction rates. A wide variety of organic and inorganic reactants are contemplated for applications in food, energy production and storage (e.g., fossil-fuels, bio-fuels, petrochemicals, fuel cells), pharmaceuticals and other chemicals, as well as environmental applications (e.g., wastewater treatment, emissions reduction, carbon capture and sequestration).

A core-shell structured catalytic material, a manufacturing method therefor, and a use thereof. The core-shell structured catalytic material comprises an anion-modified material serving as a substrate and an anion-conductive material supported on the anion-modified material. An electrode having said core-shell structure is applicable to hydrogen-production operating conditions for water electrolysis containing chloride ions, and efficient hydrogen production processes can be implemented under the operating conditions.

The invention firstly discloses a bromine adsorption electrode and a bromine catalytic oxidation electrode, the bromine adsorption electrode comprises a first electrode substrate, an adsorption active substance CoO material loaded on the first electrode substrate and Fe and N co-doped nickel-cobalt layered bimetal hydroxide, the bromine catalytic oxidation electrode comprises a second electrode substrate and a Co < 2 > O < 3 > material which is loaded on the second electrode substrate and is co-doped with catalytic oxidation active substances Ni, Fe and N. The invention also discloses a method for separating and extracting bromine from a bromine-containing solution with low bromine concentration and high chlorine-bromine ratio, and a bromine separation and extraction process system with integrated coupling of adsorption, enrichment, oxidation and separation and refining is constructed, the bromine catalytic oxidation electrode is adopted in the oxidation process, and the problem of how to efficiently extract and recover bromine resources from a solution system with low bromine concentration and serious interference (high chlorine-bromine ratio) of high-concentration chloride ions is effectively solved.

This application relates to the field of electrocatalytic carbon dioxide reduction and discloses a method for preparing a nickel hollow fiber membrane, comprising the following steps: S1, preparation of casting solution; S2, spinning and film formation: the casting solution is extruded into a tap water bath at a certain speed through spinning extrusion molding, while water is injected into the hollow fiber at a constant speed with gas, causing a phase change between the extruded fiber and water, and then the extruded fiber is soaked in tap water overnight; S3, sintering: oxygen or air is first introduced into a tube furnace for oxidation, and then reduction is carried out under a hydrogen atmosphere to obtain a complete metal hollow fiber membrane. By applying pure nickel hollow fiber to the field of electrocatalytic carbon dioxide reduction, compared with other gas diffusion electrodes, nickel hollow fiber, as a self-supporting gas diffusion electrode, does not require the use of binders such as Nafion solution, and compared with precious metals such as gold, silver, and copper, which are excellent for carbon dioxide reduction, nickel is inexpensive and suitable for large-scale use.

The invention relates to the technical field of water electrolysis hydrogen production, in particular to a method and a device for recovering performance of a proton exchange membrane water electrolysis membrane electrode. According to the method, alternating current signal excitation is carried out on the to-be-treated proton exchange membrane water electrolysis membrane electrode, and then the to-be-treated proton exchange membrane water electrolysis membrane electrode is repaired. Alternating current excitation signals with specific parameters are applied to the membrane electrode, and the performance of the membrane electrode is recovered through the physical and chemical synergistic effect of the alternating current signals. By selecting different frequencies, different failure modes can be repaired in a targeted manner, and meanwhile, direct-current bias voltage can be superposed, so that the recovery performance is further enhanced. According to the method, the performance of the membrane electrode can be accurately and nondestructively recovered, online operation can be realized, and the maintenance cost and time are greatly reduced.

The invention provides a nickel electrode with a multi-level structure and a preparation method thereof. The preparation method mainly comprises the following steps: preparing a bottom-layer concave-convex substrate structure by mixed acid dipping, and forming a middle layer and a catalyst layer structure by surface heterogeneous growth. According to the method, tight combination of the catalyst layer and the substrate is taken as a guide, the uneven nickel metal substrate is obtained through mixed acid etching aiming at the problem that the catalyst is prone to falling off, and a highly rough surface is provided for in-situ growth of a subsequent columnar middle layer. The nickel metal substrate and the nanoflower layer catalyst are connected through the middle layer, the binding force of the catalyst and the substrate is effectively increased, the catalyst is prevented from falling off, and industrial stable water electrolysis is achieved. The surface of the synthesized nickel electrode with the multi-level structure has excellent performance stability, the overpotential is only increased by 8 mV when the nickel electrode runs for 1000 hours under the current density of 500 mA cm <-2 >, and only 1.83 V is needed when the nickel electrode is in an electrolytic bath.

The invention relates to an electrode (10) with a metal substrate (14) designed as a wire mesh (12) and to an electrolysis cell (100) comprising such an electrode.

A membrane electrode assembly includes: a first catalytic electrode; a polymer electrolyte membrane covering a side surface and an upper surface of the first catalytic electrode; the first catalytic electrode is arranged on the polymer electrolyte membrane, the second catalytic electrode is arranged on the polymer electrolyte membrane, and at least one part of a corner area at the joint of the side surface and the upper surface of the first catalytic electrode has a curved surface shape.

The invention discloses a coating anode with an intermediate layer improved by a composite additive and a preparation method and application of the coating anode, and belongs to the technical field of electrodes, and the preparation method comprises five steps of titanium substrate pretreatment, intermediate layer coating liquid preparation, intermediate layer preparation, active layer coating liquid preparation and active layer preparation. In the middle layer coating liquid preparation step, an alcohol solvent and polyether modified polysiloxane are added into a middle layer base solution, the volume ratio of the middle layer base solution to the alcohol solvent to the polyether modified polysiloxane is 10: (1-5): (0.5-2), and the base solution containing the composite additive is prepared after uniform mixing. According to the method, the alcohol solvent and the polyether modified polysiloxane are added into the conventional titanium-tantalum base solution according to a specific proportion, so that cracks on the surface of the material are effectively reduced, and the compactness of the middle layer is enhanced. According to the method, the binding force of the coating is improved, and the problem of failure of an anode plate caused by passivation of a titanium base material due to surface cracks of a traditional intermediate layer is solved, so that the service life of the coating titanium anode is remarkably prolonged.

To provide an electrolytic cell technology in which damage of diaphragm is suppressed.SOLUTION: At least one of the anode 200A and the cathode used as the electrode 200 for electrolysis is bent such that the end thereof meanders in a cross-sectional view. More specifically, in the present invention, the end of electrode for electrolysis of at least one of the anode and the cathode is bent so as to meander, and by said electrode, the risk of damage to a diaphragm 300 is reduced. In particular, even when the end edge 255 of the electrode for electrolysis has a relatively sharp shape, damage to the diaphragm can be suppressed due to "meandering bending".SELECTED DRAWING: Figure 7