758results 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 discloses a rare earth element doped stainless steel oxygen evolution electrode and a preparation method thereof, and belongs to the technical field of electrode preparation. The preparation method of the stainless steel oxygen evolution electrode comprises the steps that stainless steel with impurities removed serves as an anode and is placed in an alkaline solution with the concentration being 7-12 mol / L, cyclic voltammetry is adopted, stainless steel treated through cyclic voltammetry is obtained, and the potential window is-0.3 V to 1.5 V; the stainless steel is placed in an alkaline solution with the concentration being 1-2 mol / L and serves as an anode for electrolysis, and anodic oxidation stainless steel is obtained; the anodic oxidation stainless steel is placed in a cerium ion solution, a cyclic voltammetry method is adopted, the stainless steel serves as an anode to be treated, and a stainless steel oxygen evolution electrode is obtained through electro-deposition; wherein the potential window is-1.5 V to 1.0 V (+ / -0.5 V). The preparation method is simple, the cost is low, large-scale preparation is easy, long-time, high-temperature and other complex preparation processes are not needed, and when the electrode is used as an electrode for electrolyzing oxygen evolution in water, the electrode has excellent catalytic activity and shows huge application prospects in large-scale industrial hydrogen production through water electrolysis.

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.

The invention discloses a titanium fibrofelt composite material and a PEM electrolytic tank containing the titanium fibrofelt composite material, and relates to the technical field of PEM electrolytic tanks. The titanium powder mixture is filled in the titanium fibrofelt base material on one side of the second surface of the titanium fibrofelt base material, and the particle size of the first titanium powder, the particle size of the second titanium powder, the mass ratio of the first titanium powder to the second titanium powder, and the porosity and the average pore size of the titanium fibrofelt base material are controlled to be within a proper range; the titanium fibrofelt composite material has the advantages that the titanium fibrofelt base material can be well filled with the titanium powder, and a pore structure with proper pore diameter and pore diameter distribution can be formed in the titanium fibrofelt base material, so that when the titanium fibrofelt composite material is used as an anode gas diffusion layer of a PEM electrolytic tank, the cooperative transmission effect of water and oxygen is good, the mass transfer loss in the operation process of the electrolytic tank is low, and the service life of the electrolytic tank is prolonged. The internal temperature of the electrolytic tank is easy to control.

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.

To provide a technology capable of suppressing occurrence of cracking at a peripheral edge of an air electrode.SOLUTION: A solid oxide electrolyzer cell comprises: an air electrode; a fuel electrode; and a solid electrolyte layer disposed between the air electrode and the fuel electrode. A peripheral edge of the air electrode includes, in part or in entirety, an irregular part where projections and recesses are alternately repeated. Where, in the irregular part, a first line is defined as a line passing through a first point, which is the most recessed point, and a second point, which is the second most recessed point, and a second line is defined as a line parallel to the first line and located at a position corresponding to half the distance from a third point, which is the most protruding point, to the first line, in the irregular part, the area of a portion protruding from the second line is larger than the area of a portion recessed from the second line.SELECTED DRAWING: Figure 5

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 present invention is related to an electrolyzer for producing hydrogen and to a method for the production of hydrogen. The electrolyzer for producing hydrogen (210) comprises a plurality of electrolysis cells (1) arranged in a plurality of planes (2), each having at least one anode (10) and one cathode (11) and a proton exchange membrane (3) between the anode (10) and the cathode (11), the proton exchange membranes (3) forming respective active area regions (30), wherein at least one electrolysis cell (1) has a plurality of active area regions (30) arranged substantially in a plane (2), wherein the electrolyzer comprises at least one tie rod (130) provided between active area regions (30) and extending perpendicular with regard to the planes (2).

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.

An electrochemical cell (10) comprises a support body (11), an active hydrogen electrode layer (12), an electrolyte layer (13), and an oxygen electrode layer (15). The support body (11) comprises a hydrogen electrode current collecting layer (20) and a first beam portion (31) and a second beam portion (32) embedded in the hydrogen electrode current collecting layer (20). The active hydrogen electrode layer (12) has an overlapping portion (12a) that overlaps the first beam portion (31) or the second beam portion (32) in a Z-axis direction, and a non-overlapping portion (12b) that does not overlap the first beam portion (31) or the second beam portion (32) in the Z-axis direction.The average particle size of Ni particles contained in the overlapping portion (12a) is smaller than the average particle size of Ni particles contained in the non-overlapping portion (12b).

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).

A wastewater treatment system comprises an actinic radiation reactor and a concentric tube electrode electrochemical cell in fluid communication between a source of electrolyte and the actinic radiation reactor. The electrochemical cell is configured to produce a chlorinated effluent including sodium hypochlorite. A conduit fluidically couples an outlet of the electrochemical cell to an inlet of the actinic radiation reactor and is configured to deliver the chlorinated effluent into the actinic radiation reactor.

A high-output tap water softening electrolyzer device, housed in a non-metal casing and configured for low internal pressure buildup and a method of using the same are provided herein, wherein the casing and the lid of the device are made essentially from a polymeric material rather than a metal.

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 application provides a hydrogen production diaphragm, a preparation method and application thereof, and the hydrogen production diaphragm comprises a body layer and a protective layer which is compounded on the surface of the body layer; the body layer is prepared from a polymer material, MOF nanoparticles and a reinforcing agent; or the body layer comprises a support formed by a polymer material, and a coating layer which is compounded on the surface of the support and comprises MOF nanoparticles and a reinforcing agent. The hydrogen production diaphragm can maintain voltage stability in a high-chloride-ion environment, improve electrolytic hydrogen production activity, prevent corrosion of the hydrogen production diaphragm by chloride ions, and increase the service life of the diaphragm.

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 invention discloses an electrode structure, a preparation method and application. The electrode structure comprises a base part and a plurality of protruding parts, the plurality of protruding parts are distributed on the surface of the base part at intervals, and the intervals between the adjacent protruding parts form circulation channels used for conducting liquid and / or gas. The preparation method of the electrode structure comprises the following steps that a shielding layer is prepared on the surface of a substrate part, and the shielding layer shields partial area of the surface of the substrate part; and performing etching treatment on the shielding layer-free region on the surface of the substrate part. The electrode structure is provided with the comb finger structure composed of the multiple protruding parts, the wettability of liquid can be remarkably improved, the liquid can easily enter the circulation channel, the contact area between the liquid and the surfaces of the protruding parts is increased, and the uniformity of test data is improved. The gas is more difficult to enter the circulation channel than the liquid, and larger bubbles stay on the end face of the protruding part and are difficult to enter the circulation channel, so that the electrode test is prevented from being interfered.

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 relates to the technical field of solid oxide electrolytic cells, and discloses an electrochemical reactor, application thereof, a method for preparing ethylene / carbon monoxide through methane / carbon dioxide electrochemical reforming and a catalyst. Wherein the electrochemical reactor comprises an anode, a cathode and an electrolyte layer arranged between the anode and the cathode, the anode comprises an anode carrier and an anode catalyst attached to the anode carrier, and the cathode comprises a cathode carrier and a cathode catalyst attached to the cathode carrier; the main components of the anode carrier and the cathode carrier are yttria-stabilized zirconium oxide, and the micro-channel structure is characterized in that the anode carrier and the cathode carrier are respectively provided with a micro-channel structure. The electrochemical reactor has the effects of improving Faraday efficiency, methane conversion rate and C2 and ethylene selectivity and reducing over-oxidation products CO and CO2 generated by an anode in a method for preparing ethylene / carbon monoxide through methane / carbon dioxide electrochemical reforming.

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.