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MEMBRANE ELECTRODE ASSEMBLY FOR COx REDUCTION

Absstract of: US2025333857A1

Provided herein are membrane electrode assemblies (MEAs) for COx reduction. According to various embodiments, the MEAs are configured to address challenges particular to COx including managing water in the MEA. Bipolar and anion-exchange membrane (AEM)-only MEAs are described along with components thereof and related methods of fabrication.

SQUARE-METER-SCALE STAINLESS STEEL INTEGRATED ELECTRODE WITH SURFACE MODIFIED BY BIMETALLIC SULFIDE AND PREPARATION METHOD AND APPLICATION THEREOF

Absstract of: US2025333863A1

Disclosed in the present disclosure are a square-meter-scale stainless steel integrated electrode with a surface modified by bimetallic sulfide, and a preparation method and application thereof. The preparation method includes the following steps: (1) performing ultrasonic cleaning on a stainless steel substrate with deionized water, acetone and ethanol in sequence, performing heating and soaking with a dilute hydrochloric acid solution, and finally, performing drying after washing and cleaning with deionized water to obtain the stainless steel substrate with a clean surface; (2) dissolving two transition metal cation salts and a sulfur source in an aqueous solution and performing stirring at a room temperature for even mixing; and (3) putting the stainless steel substrate with the clean surface obtained in step (1) into the solution of the step (2) for a heating reaction, washing an obtained sample with water after the reaction is finished, and then, performing drying.

ADHESIVE-FIXED ELECTROLYSIS MODULE

Absstract of: US2025333859A1

Provided is an adhesive-fixed electrolysis module comprising a single stack, the single stack having a separator, a pair of bipolar plates, a pair of gaskets, a pair of diffusion layers, a pair of electrodes, and a cell frame, wherein the bipolar plates, the gaskets, the diffusion layers, and the electrodes are sequentially arranged on the cathode and anode sides, respectively, with respect to the separator, forming a symmetrical structure, wherein the separator, the bipolar plates, the gaskets, the diffusion layers, and the electrodes are stacked in a zero-gap manner within the cell frame, and wherein the bipolar plates are adhered and fixed to the cell frame using an adhesive, thereby simplifying product assembly and reducing assembly costs compared to a single stack fixing method using welding, riveting, bolting, etc. between conventional parts.

ELECTRODE OF ELECTROLYTIC CELL, AND APPLICATION THEREOF

Absstract of: WO2025223557A1

An electrode of an electrolytic cell, and an application thereof. The electrode comprises: a substrate (102); a surface treatment layer (106), which is formed on the substrate (102); and a catalyst layer (20), which is formed on the surface treatment layer (106). The surface structure and/or surface properties of the substrate can be modified by means of the surface treatment layer, so that the surface area of a subsequent electrode is increased, allowing more active sites to be exposed, thereby effectively improving the electrochemical performance of the electrode.

ELECTRODE OF ELECTROLYZER, AND USE

Absstract of: WO2025223558A1

An electrode of an electrolyzer, and the use thereof. The electrode comprises a substrate (30) and a catalyst layer (20) formed on the substrate, wherein the catalyst layer comprises a plurality of first catalyst zones (201) and a plurality of second catalyst zones (202), and the structural texture of the first catalyst zones (201) is different from the structural texture of the second catalyst zones (202). Using the catalyst zones having different structural textures can increase active sites of the catalyst layer, and can also achieve an effective dispersion effect on the distribution of an active catalyst on the substrate, so as to avoid excessive agglomeration in local regions, thus increasing the utilization rate of precious metal.

HYDROGEN GENERATION DEVICE WITH BREATHING DETECTION FUNCTION

Absstract of: WO2025222998A1

A hydrogen generation device with a breathing detection function. The hydrogen generation device comprises an electrolytic cell, a gas pipe, a sensor, a valve switch and a controller, wherein the electrolytic cell is used for electrolyzing water to generate a hydrogen-containing gas; the gas pipe is in communication with the electrolytic cell and has a gas outlet, and the gas pipe is used for receiving the hydrogen-containing gas and outputting the hydrogen-containing gas through the gas outlet; the sensor is used for sensing the breathing of a user to generate a breathing signal; the valve switch is arranged in the gas pipe; and the controller is electrically connected to the valve switch and the sensor, and the controller opens the valve switch on the basis of an inspiration signal, and closes the valve switch on the basis of an expiration signal. Therefore, the present invention provides the hydrogen-containing gas, and does not provide the hydrogen-containing gas in an expiration state, such that not only can excessive pressure in a breathing tube be prevented, but also the hydrogen-containing gas can be prevented from rapidly flowing to a user when the user inhales again, thereby improving the practicability and the usage experience.

HYDROGEN PRODUCTION SYSTEM AND HYDROGEN PRODUCTION METHOD

Absstract of: US2025333853A1

A hydrogen production system and a hydrogen production method includes: a heat exchanger that heats steam by using a heating medium heated by thermal energy at 600° C. or higher; a high-temperature steam electrolysis device that electrolyzes steam at 600° C. or higher to produce hydrogen by applying, to a high-temperature steam electrolysis cell, a voltage lower than an electric potential at a thermal neutral point at which Joule heating caused by application of a current and heat absorption caused by electrolysis reaction are balanced; and a heating device that heats the high-temperature steam electrolysis device by the steam.

WATER ELECTROLYSIS SYSTEM

Absstract of: US2025333854A1

A water electrolysis system that generates hydrogen and oxygen by electrolysis of water includes a water electrolysis cell including an anode, a cathode, and an electrolyte membrane sandwiched between the anode and the cathode, and a control device that controls electric power supplied to the water electrolysis cell, wherein the control device performs a potential changing process of changing a potential of the anode either or both of upon starting of the water electrolysis system and during continuous operation of the water electrolysis system, and the potential changing process includes a potential lowering process of lowering the potential of the anode to a predetermined potential.

MODULAR HYDROGEN GENERATION SYSTEM

Absstract of: US2025333852A1

A modular hydrogen generation system (“system”) comprises a high-pressure containment vessel (“vessel”) defining a hydrogen plenum. The system also comprises a hydrogen generation insert (“insert”) shaped to be received in the hydrogen plenum. The insert includes a cover, one or more proton-exchange membrane (“PEM”) cells, an oxygen-water separator; and a passive dual regulator with relative differential venting (“regulator”). The insert is inserted into the hydrogen plenum such that hydrogen and oxygen can be produced at an interior pressure of from 200 to 6,000 psi. The regulator receives oxygen from the oxygen-water separator and hydrogen from the hydrogen plenum and regulates pressure imbalances between an oxygen-side of the system, vents oxygen to an exterior of the high-pressure containment vessel, and vents hydrogen to an exterior of the vessel to allow collection of hydrogen and oxygen and avoid rupture of the one or more PEM cells during operation.

HIGH PRESSURE GASKET FOR AN ELECTROLYSIS DEVICE

Absstract of: US2025333858A1

The electrolysis device includes a plurality of plates that have a plurality of sets of aligned fluid openings. At least one of the sets of aligned fluid openings is configured for conveying high pressure hydrogen gas. At least one gasket, which has an annular shape and is made of an elastomeric material, surrounds at least one of the sets of aligned fluid openings to establish a fluid-tight seal between at least two of the plurality of plates. The at least one gasket has a generally constant cross-sectional shape around a central axis, the cross-sectional shape having a sealing surface that includes a pair of peaks that are spaced radially apart from one another and that includes a pair of elevated plateaus on opposite radial sides of the pair of peaks.

CONTAINED HYDROGEN GENERATION SYSTEM

Absstract of: US2025333851A1

A contained hydrogen generation system (“system”) comprises a high-pressure containment vessel (“vessel”), one or more proton-exchange membrane (“PEM”) cells, an oxygen-water separator, and a passive dual regulator with relative differential venting (“regulator”). The vessel defines a hydrogen plenum. The PEM and the oxygen-water separator are disposed in the hydrogen plenum. The regulator includes a hydrogen fluid path in fluid communication with the hydrogen plenum, an exterior hydrogen storage vessel, and an exterior of the vessel, and also includes an oxygen fluid path in fluid communication with the oxygen-water separator, an exterior oxygen storage vessel, and an exterior of the vessel. The regulator regulates pressure imbalances between an oxygen-side of the system and a hydrogen-side of the system, and vents oxygen and hydrogen to an exterior of the vessel to allow collection of both hydrogen and oxygen and avoid rupture of a PEM in the one or more PEM cells.

ELECTROCATALYST FOR WATER ELECTROLYSIS AND PREPARING METHOD OF THE SAME

Absstract of: US2025333864A1

Discloses are an electrocatalyst for a water electrolysis and a method of preparing the same, which includes a support made of a MXene having a two-dimensional structure; and a transition metal compound located on and heterogeneously bonded to the support, and applies two or more metal phosphides selected from a transition metal group consisting of nickel, iron, molybdenum, cobalt and tungsten as the transition metal compound, thereby increasing electrochemical activity by improving the operation stability and increasing the surface area compared to conventional commercial catalysts.

TITANIUM NANOTUBES MODIFIED WITH COBALT OXYPHOSPHIDES FOR HYDROGEN PRODUCTION AND METHODS OF PREPARATION THEREOF

Absstract of: US2025333865A1

An electrocatalyst useful for forming hydrogen from water by the hydrogen evolution reaction. The electrocatalyst includes a titanium (Ti)-including substrate, an array of titanium dioxide (TiO2) nanotubes (TNTs) disposed on the Ti-including substrate, and cobalt oxyphosphide (CoOP) nanostructures disposed on the surface of the TNTs. The TNTs are crystalline, as observed by powder X-ray diffraction (PXRD). The CoOP is amorphous by PXRD, and the CoOP nanostructures are substantially spherical and have a mean size of 75 to 400 nanometers (nm).

ELECTRODE FOR ELECTROLYSIS AND ELECTROLYZER

Absstract of: US2025333867A1

An electrode for electrolysis, including: a conductive substrate; and a catalyst layer disposed on a surface of the conductive substrate, in which at least one of the following conditions (I) and (II) is satisfied:(I) the catalyst layer contains a ruthenium element and an iridium element, and a crystallite size is 50 Å or more and 100 Å or less, the crystallite size being calculated from a peak observed in a 20 range of 27° or more and 28.5° or less in an XRD spectrum, the XRD spectrum being obtained by subjecting the catalyst layer to X-ray diffraction measurement and(II) the catalyst layer contains (i) a ruthenium element, (ii) an iridium element, and (iii) at least one kind of metal element M selected from the group consisting of W, Zn, Mn, Cu, Co, V, Ga, Ta, Ni, Fe, Mo, Nb and Zr, in the catalyst layer.

ELECTROLYSIS UNIT FOR A FILTER-PRESS-TYPE ELECTROLYSER

Absstract of: US2025333860A1

Electrolysis unit including a plurality of electrolysis cells held against one another along a stacking axis (Oy) between a first intermediate end plate and a second intermediate end plate, the first end plate including a first smooth bore and the second end plate including a second smooth bore. A tie rod including a body provided, at a first end, with a first head and, at a second end, with a second head, and first tensioning means for tensioning it. An electrolyzer includes the electrolysis unit.

Separator for Water Electrolysis

Absstract of: US2025333868A1

A separator (1) for water electrolysis comprising on at least one side thereof:—a surface area Smax,—a surface area Sc for contacting a surface of an electrode, and—a channel (10) for evacuating gas bubbles having a cross section Φc, characterized in that:—a ratio Sc/Smax is from 0.025 to 0.50, and—the cross section Φc is large enough for evacuating gas bubbles having a diameter from 5 to 50 μm.

SYSTEM AND METHOD FOR PRODUCING AMMONIA

Absstract of: US2025333316A1

The invention relates to a system and a method for generating ammonia, wherein, in an ammonia reactor, ammonia (NH3) is generated from a synthesis gas, wherein the synthesis gas contains hydrogen (H2) and nitrogen (N2), wherein a nitrogren supply flow and a first heat exchanger are used, which are designed in such a way that the hot ammonia (NH3) flowing out of the ammonia reactor heats the nitrogen used as synthesis gas in the nitrogen supply flow.

AMMONIA DECOMPOSITION OVER MEDIUM ENTROPY METAL ALLOY CATALYSTS

Absstract of: US2025333298A1

A method of catalytic ammonia decomposition is provided. The method includes: flowing ammonia into a reactor charged with a medium entropy metal alloy (MEA) catalyst including a first principal metal, a second principal metal, and a third principal metal, where each of the principal metals is independently selected without repetition from the group consisting of Co, Cr, Fe, Mn, Ni, Al, Cu, Zn, Ti, Zr, Mo, V, Ru, Rh, Pd, Ag, W, Re, Ir, Pt, Au, Ce, Y, Yb, Sn, Ga, In, and Be; and catalytically decomposing the ammonia into hydrogen and nitrogen over the MEA catalyst in the reactor at a reaction temperature between 200° C. and 900° C.

DIRECT COATING OF ANION EXCHANGE MEMBRANES WITH CATALYTICALLY ACTIVE MATERIAL

Absstract of: US2025332550A1

The invention relates to the coating of anion exchange membranes (AEM) with catalytically active substances. The CCM thus obtained are used in electrochemical cells, especially for alkaline water electrolysis. It was an object of the invention to specify a process for producing a CCM by direct coating which maintains the necessary planarity of the AEM and ideally avoids the use of lost films and eschews CMR substances. Swelling shall also be minimized. The process shall also be performable with fluorine-free ionomers. The invention is based on the finding that the addition of certain organic substances has the result that the AEM swells only to a small extent, if at all (antiswelling agent). It has surprisingly been found that substances suitable as antiswelling agents are identifiable by their solubility behaviour, more particularly by their Hansen parameters.

AMMONIA DECOMPOSITION OVER SUPPORTED MEDIUM ENTROPY METAL ALLOY CATALYSTS

Absstract of: US2025332578A1

A method of catalytic ammonia decomposition, where the method includes: flowing ammonia into a reactor charged with a supported medium entropy metal alloy (MEA) catalyst including MEA particles supported on a support, the MEA particles including a first principal metal, a second principal metal, and a third principal metal, where each of the principal metals is independently selected without repetition from the group consisting of Co, Cr, Fe, Mn, Ni, Al, Cu, Zn, Ti, Zr, Mo, V, Ru, Rh, Pd, Ag, W, Re, Ir, Pt, Au, Ce, Y, Yb, Sn, Ga, In, and Be; and catalytically decomposing the ammonia into hydrogen and nitrogen over the supported MEA catalyst in the reactor at a reaction temperature between 200° C. and 900° C.

METHOD AND PLANT FOR PRODUCING HYDROGEN

Absstract of: AU2024256387A1

The invention relates to a method (100) for producing hydrogen (103), wherein feed water is subjected to electrolysis (10) with a cathode gas (101) being obtained, wherein the cathode gas (101) contains hydrogen, oxygen and some of the feed water, wherein a process gas flow (102) is formed using at least some of the cathode gas (101), wherein the process gas flow (102) contains at least some of the hydrogen, oxygen and feed water contained in the cathode gas (101), and wherein, in the process gas flow (102), at least some of the oxygen is subjected to an oxidative catalytic reaction with some of the hydrogen to form oxidation water, and wherein at least some of the feed water and the oxidation water in the process gas flow (102) are removed from the process gas flow (1029 in a water removal process. The catalytic reaction and the water removal process are carried out using one or more process units (41, 42), wherein the one process unit (41, 42) or each of the plurality of process units (41, 42) has a first adsorptive drying bed (4a), by means of which at least some of the feed water is removed from the process gas flow (102), a catalytic bed (4b) which is arranged downstream of the first drying bed (4a) and by means of which the catalytic reaction is carried out, and a second adsorptive drying bed (4c) which is arranged downstream of the catalytic bed and by means of which at least some of the oxidation water is removed from the process gas flow (102). The invention also pro

METHOD AND SYSTEM FOR PRODUCING HYDROGEN WITH DECREASED ELECTRICITY CONSUMPTION

Absstract of: WO2025223916A1

The invention relates to a method for producing hydrogen via steam electrolysis, the method comprising the following steps: - producing steam (112) by heating liquid water (204); and - electrolysing, in an electrolysis unit (102), at least a portion of the steam (112) to provide a first output stream (116) rich in hydrogen and a second output stream (118) rich in oxygen; characterised in that the steam is produced by at least one heat pump circuit reusing a portion of the heat from at least one of the output streams (116, 118) in order to vaporise the liquid water. The invention also relates to a system (400) implementing such a method.

HYDROGEN PRODUCTION VIA SEAWATER SPLITTING

Absstract of: AU2023408768A1

A method of hydrogen production includes providing a solution and immersing a device in the solution. The device includes a substrate having a surface, an array of conductive projections supported by the substrate and extending outward from the surface of the substrate, and a plurality of catalyst nanoparticles disposed over the array of conductive projections. The solution includes dissolved sodium chloride (NaCl).

WATER ELECTROLYSIS HYDROGEN PRODUCTION SYSTEM

Absstract of: EP4640922A1

Provided is a water electrolytic hydrogen production system configured by connecting a plurality of water electrolysis stacks in series, wherein the system is capable of ensuring sufficient insulation performance of each of the water electrolysis stacks. The water electrolytic hydrogen production system includes: a plurality of water electrolysis apparatuses, wherein each of the water electrolysis apparatuses includes: a water electrolysis stack configured to generate hydrogen and oxygen by electrolysis of water; a water supply portion configured to supply water to the water electrolysis stack; a water intake portion configured to take water into the water supply portion from outside; a hydrogen release portion configured to release hydrogen generated in the water electrolysis stack to outside; and an oxygen release portion configured to release oxygen generated in the water electrolysis stack to outside, the water electrolysis stacks of the plurality of water electrolysis apparatuses are electrically connected to each other in series, and an insulation member is disposed at a connecting portion of piping for supplying or releasing a fluid with outside of the apparatus, the piping including at least the water intake portion, the hydrogen release portion, and the oxygen release portion of each of the plurality of water electrolysis apparatuses.

PROCESS FOR PRODUCING GAS COMPRISING HYDROGEN

Nº publicación: EP4640623A1 29/10/2025

Applicant:

AIR LIQUIDE [FR]
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE

Absstract of: EP4640623A1

The invention relates to a process (100) for producing a hydrogen product (81) from an endothermic cracking reaction of an ammonia feed (4), comprising the following steps:- providing (S10) the ammonia feed to a cracking unit (210),- in said cracking unit, performing (S20) the endothermic cracking reaction of the ammonia feed, thereby producing a cracked gas (80) containing hydrogen (81), nitrogen (82) and unconverted ammonia (83),- in said cracking unit, combusting the separated unconverted ammonia in a combustion step (S40) to provide heat to the endothermic cracking reaction,- reducing (S50) a cracking temperature (Tc) of the endothermic cracking reaction, thus increasing the amount of unconverted ammonia in the cracked gas and to be combusted to provide heat to the endothermic cracking reaction,- controlling (S60) the flow of the ammonia feed directed to the cracking unit to produce a desired amount of hydrogen product (Psp).