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Electrolytic hydrogen

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LastUpdate Updated on 26/02/2026 [07:00:00]
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SEMICONDUCTOR CATALYST, CATALYST ELECTRODE, METHOD FOR PRODUCING REDUCED PRODUCT, AND DEVICE FOR PRODUCING REDUCED PRODUCT

Publication No.:  EP4699693A1 25/02/2026
Applicant: 
DAICEL CORP [JP]
UNIV NAT CORP KANAZAWA [JP]
Daicel Corporation,
National University Corporation Kanazawa University
EP_4699693_A1

Absstract of: EP4699693A1

A semiconductor catalyst is provided, which exhibits an effect of accelerating a reduction reaction by visible light irradiation and is excellent in durability. The semiconductor catalyst of the present disclosure includes thin film containing nitrogen-containing diamond particles in a plane direction and a height direction. The semiconductor catalyst can be produced by, for example, fixing, on a substrate having a positive or negative charge, nitrogen-containing diamond particles having a positive or negative charge, the positive or negative charge of the nitrogen-containing diamond particles being opposite to that of the substrate, and laminating, on the fixed nitrogen-containing diamond particles, nitrogen-containing diamond particles having a positive or negative charge, the positive or negative charge of the laminated nitrogen-containing diamond particles being opposite to that of the fixed nitrogen-containing diamond particles. The step of laminating is performed at least once after the step of fixing.

REDUCTION DEVICE, REDUCTION METHOD, AND PRODUCTION METHOD FOR REDUCTION PRODUCT

Publication No.:  EP4699691A1 25/02/2026
Applicant: 
DAICEL CORP [JP]
UNIV NAT CORP KANAZAWA [JP]
Daicel Corporation,
National University Corporation Kanazawa University
EP_4699691_A1

Absstract of: EP4699691A1

Provided is a reduction device that can be manufactured inexpensively and easily, has a wide reaction field, can achieve a reduction reaction even with low energy light such as visible light, and has a long catalyst life. The reduction device of the present disclosure includes diamond particles. It is preferable to contain the diamond particles as a diamond particle dispersion liquid. The diamond particles preferably contain nanodiamond particles having a particle size of 1 µm or less. The diamond particles preferably include detonation nanodiamond particles.

A METHOD FOR PRODUCING GREEN HYDROGEN BY ELECTROLYSIS IN A HYBRID POWER PLANT

Publication No.:  EP4699201A1 25/02/2026
Applicant: 
CWP H1 ENERGY PTE LTD [SG]
SCHUMACHER GUIDO [DE]
CWP H1 Energy Pte Ltd,
Schumacher, Guido
DE_102023109764_PA

Absstract of: WO2024217840A1

A method for producing green hydrogen by electrolysis in a hybrid power plant (10), which comprises at least: - a wind turbine (11 ) with a rotor (11.1), a drive-train and a generator; multiple photovoltaic modules (12), - an electrolysis unit (15) for producing hydrogen by electrical power generated by the wind turbine (11) and/or the photovoltaic modules (12), an internal electrical power grid interconnecting the generator, the photovoltaic modules (12) and the electrolysis unit (15) within the power plant (10) and - a control unit (16); wherein a) electrical energy is generated by using the photovoltaic modules (12) and/or wind turbines (11 ); b) cloud coverage and/or solar radiation is measured by at least one weather sensor (14) which is located in a windward position remote of the power plant (10) and which is connected to the control unit (16) via a data link; According to a first aspect of the invention the wind turbine (11) is used as kinetic energy storage and according to another aspect of the invention the wind turbine (11) is used as an energy absorber by increasing inertia of the rotor (11.1).

METHOD AND SYSTEM FOR STORING HYDROGEN

Publication No.:  EP4698817A1 25/02/2026
Applicant: 
TECHNIPFMC NORGE AS [NO]
TechnipFMC Norge AS
KR_20260003728_PA

Absstract of: WO2024218273A1

A method for storing hydrogen in a plurality of subsea storages in a system. The system comprising an electrolyser source (100) for producing hydrogen at a source pressure; a downstream compressor (200) for compressing the hydrogen from the source pressure to a compressed higher pressure; and a plurality of storages (300) each for storing compressed hydrogen at the compressed higher pressure and each being subsea. The method comprising at least the steps of: producing hydrogen (1000) by the electrolyser source (100) at the source pressure; passing the hydrogen (2000) to the plurality of storages (300) through a bypass line (210) around the compressor (200); and storing the hydrogen (3000) in at least one of the plurality of storages (300) at a first pressure below the compressed higher pressure. A system for storing hydrogen in a plurality of subsea storages, the system comprising: an electrolyser source (100) for producing hydrogen at a source pressure; a downstream compressor (200) for compressing the hydrogen from the source pressure to a compressed higher pressure; a plurality of storages (300) each for storing compressed hydrogen at the compressed higher pressure and each being subsea; and a controller (400) for controlling the electrolyser source (100), the downstream compressor (200), and valves (310) to the plurality of storages (300). The controller (400) is configured for controlling the system in, at least, two alternative ways: A) passing the hydrogen, produced by

NANOSTRUCTURED ELECTRODE FOR WATER ELECTROLYSIS AND WATER ELECTROLYZER COMPRISING THE SAME

Publication No.:  EP4698693A1 25/02/2026
Applicant: 
SMOLTEK AB [SE]
Smoltek AB
SE_2350468_A1

Absstract of: SE2350468A1

An electrode (200) for a proton exchange membrane water electrolyzer, the electrode (200) comprising a plurality of elongated nanostructures (220) arranged on a substrate (210). The elongated nanostructures (220) are attached to the substrate (210) at a respective first end and extend along a direction perpendicular to a plane of extension of the substrate (210). The plurality of elongated nanostructures (220) are coated with a conformal protective layer (230), and a catalyst layer (240) is arranged on the conformal protective layer. The catalyst layer (240) comprises a plurality of nanoparticles (241), the nanoparticles (241) forming a continuous coating on at least a part of the surface of the plurality of elongated nanostructures (220).

CATALYST MATERIALS

Publication No.:  EP4698696A1 25/02/2026
Applicant: 
JOHNSON MATTHEY HYDROGEN TECHNOLOGIES LTD [GB]
Johnson Matthey Hydrogen Technologies Limited
WO_2024218486_PA

Absstract of: WO2024218486A1

Oxygen evolution catalyst materials are provided with a pyrochlore-type structure and with (i) calcium and / or sodium as A-site elements of the pyrochlore-type structure; (ii) iridium and / or ruthenium as first B-site elements of the pyrochlore-type structure; (iii) niobium and / or tantalum as second B-site elements of the pyrochlore-type structure; and (iv) a molar ratio of A-site elements: first and second B-site elements is in the range of and including 0.8: 1 to 1:1.

CONTAMINATION MITIGATION SYSTEM FOR USE IN AN ELECTROLYSIS SYSTEM

Publication No.:  EP4700154A1 25/02/2026
Applicant: 
NEW HYDROGEN IP LLC [US]
New Hydrogen IP, LLC
EP_4700154_PA

Absstract of: EP4700154A1

An electrolysis system includes an electrolyzer stack and a contamination mitigation system. The electrolyzer stack includes an injection port fluidly connected with a cathode compartment of the electrolyzer stack. The contamination mitigation system is configured to remove ions from the electrolyzer stack to mitigate ion contamination in the electrolyzer stack. The contamination mitigation system includes a storage tank including formic acid therein and an injection line fluidly coupled between the storage tank and the injection port. The injection line is configured to direct the formic acid from the storage tank to the injection port for injection into the cathode compartment of the electrolyzer stack.

Method and plasma reactor for the production of hydrogen gas

Publication No.:  GB2643493A 25/02/2026
Applicant: 
TETRONICS TECH LIMITED [GB]
Tetronics Technologies Limited
GB_2643493_PA

Absstract of: GB2643493A

A method for the production of hydrogen gas comprising (i) providing a DC electrical power supply, (ii) providing a plasma reactor with chamber 105, plasma torch 135 with a plasma cathode extending in to the chamber, a plasma anode extending into the chamber, and first and second spray systems which extend into the chamber, (iii) establishing a DC electric potential between the cathode and anode to generate and sustain a reaction zone about a plasma arc, (iv) providing a spray of hydrogen containing feedstock into the reaction zone from the first spray system whereby a mixture of gases comprising hydrogen gas is formed in the chamber by decomposition of the feedstock, and (v) providing a spray of water into adjacent to the reaction zone from the second spray system, wherein the water spray cools and dilutes the mixture of gases formed in step (iv). A plasma reactor comprising a chamber, plasma torch comprising a plasma cathode extending into the chamber and multi-functional device with plasma anode extending into the chamber, first spray anode with first annual passage surrounding the anode and providing a spray of hydrogen containing feedstock, and a second spray system with second annual passage surrounding the first passage and providing a spray of water.

PROCESS FOR AMMONIA SYNTHESIS USING GREEN HYDROGEN AND METHOD FOR REVAMPING AN AMMONIA PLANT

Publication No.:  EP4698485A1 25/02/2026
Applicant: 
CASALE SA [CH]
CASALE SA
CN_121175264_PA

Absstract of: AU2024257970A1

Process for synthesis of ammonia wherein: ammonia make-up gas (7) containing hydrogen and nitrogen is reacted in an ammonia converter (15) under ammonia forming conditions thus obtaining an ammonia-containing effluent (8); a first hydrogen portion contained in the ammonia make-up gas (7) is produced by reforming a hydrocarbon source (1) in a reforming process (100); a second hydrogen portion (19) contained in the ammonia make-up gas (7) is produced separately from said reforming process (100), by using at least a renewable energy source (SE, WE); a part of said hydrogen (19) produced in step (c) is stored in a hydrogen storage (103); hydrogen (20) from said hydrogen storage (103) is used to fully or partially replace said second hydrogen portion (19) when said renewable energy source (SE, WE) is fully or partially unavailable. Said process comprising the steps of: assessing an expected flow rate of the hydrogen (19) produced in step (c); adjusting a flow rate of the hydrocarbon source (1) so that a flow rate of the first hydrogen portion in said ammonia make- up gas (7) is in a desired ratio with respect to said expected flow rate; detecting an actual amount, e.g., a filling level, of said hydrogen in said hydrogen storage (103); detecting an actual flow rate of hydrogen produced using the renewable energy source (SE, WE), and adjusting a flow rate of the hydrogen (20) from said hydrogen storage (103) depending on said actual amount detected in said hydrogen storage (103) and

METHOD AND PLANT FOR PRODUCING HYDROGEN

Publication No.:  EP4698692A1 25/02/2026
Applicant: 
LINDE GMBH [DE]
Linde GmbH
AU_2024256387_PA

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

SYSTEMS AND METHODS FOR WATER ELECTROLYSIS WITH ELECTRODES HAVING NICKEL-COBALT-PHOSPHOROUS-BASED COMPOUNDS

Publication No.:  EP4700159A1 25/02/2026
Applicant: 
HONEYWELL INT INC [US]
Honeywell International Inc
EP_4700159_PA

Absstract of: EP4700159A1

Systems and methods are provided for water electrolysis. The system includes an electrolyte material configured for the exchange of anions, a first electrode including a nickel-cobalt-phosphorus-based compound, and a second electrode, wherein the first electrode and the second electrode are configured to exchange the anions through the electrolyte material.

ELECTROLYZER SYSTEMS AND OPERATION THEREOF

Publication No.:  EP4698697A1 25/02/2026
Applicant: 
CAPELLA PARTNERS LLC [US]
Capella Partners, LLC
US_20260028730_PA

Absstract of: US20260028730A1

Conventional control schemes for electrolyzers focus on maximizing electrical efficiency, which describes the relationship between the electrical energy consumed and the gas produced by the electrolyzer. However, the cost associated with high electrical efficiency may be unnecessarily expensive. In one embodiment presented herein, a model is used to determine the cost (or profit) associated with a gas produced by the electrolyzer at each of a plurality of operating conditions. The control system can select the operating condition to use based on which operating condition is associated with the lowest cost (or highest profit), even though that operating condition may not be associated with the highest electrical efficiency.

PROCESS FOR CRACKING AMMONIA

Publication No.:  EP4698487A1 25/02/2026
Applicant: 
JOHNSON MATTHEY DAVY TECHNOLOGIES LTD [GB]
Johnson Matthey Davy Technologies Limited
KR_20250166934_PA

Absstract of: CN120813538A

A process for catalytic cracking of ammonia, the process comprising: supplying an ammonia feed gas to one or more heated catalyst-containing reaction vessels disposed within an ammonia cracking reactor; and cracking ammonia in the ammonia feed gas in the one or more catalyst-containing reaction vessels to produce a hydrogen-containing stream wherein the ammonia feed gas is fed to the or each reaction vessel at a pressure of at least 10 bar wherein the or each reaction vessel is heated to a temperature of at least 500 DEG C, and wherein the or each of the reaction vessels has a wall comprising or consisting of an alloy selected to resist both nitriding and creep deformation without failure at said temperature and pressure over an operating period of at least 1000 hours, 5000 hours, 10,000 hours, 50,000 hours or 100,000 hours.

PROCESS FOR CRACKING AMMONIA

Publication No.:  EP4698486A1 25/02/2026
Applicant: 
JOHNSON MATTHEY DAVY TECHNOLOGIES LTD [GB]
Johnson Matthey Davy Technologies Limited
CN_120835863_PA

Absstract of: CN120835863A

A process for catalytic cracking of ammonia, the process comprising: supplying an ammonia feed gas to one or more heated catalyst-containing reaction vessels disposed within an ammonia cracking reactor; and cracking ammonia in the ammonia feed gas in the one or more catalyst-containing reaction vessels to produce a hydrogen-containing stream wherein the reaction vessel or each of the reaction vessels has a wall comprised of at least a first alloy and a second alloy wherein the first alloy is more resistant to nitriding than the second alloy, and the second alloy provides mechanical support for the first alloy, and wherein at least a portion of the wall adjacent the catalyst is comprised of the first alloy.

氢的制造方法

Publication No.:  CN121568895A 24/02/2026
Applicant: 
国立研究开发法人科学技术振兴机构
CN_121568895_PA

Absstract of: WO2025028396A1

A method for producing hydrogen is provided in which ammonia can be highly efficiently decomposed even with low power consumption to produce hydrogen. This method for producing hydrogen includes a step in which an ammonia decomposition catalyst including a titanium oxide represented by general formula (1) or a titanium oxynitride represented by general formula (2) is brought into contact with ammonia while being irradiated with microwaves at low output. General formula (1): ATiO3-x (A is at least one member selected from the group consisting of Ba and Sr, and x is a number represented by 0.1≤x≤2.0.) General formula (2): ATiO3-xNy (A is at least one member selected from the group consisting of Ba and Sr, x is a number represented by 0.1≤x≤2.0, and y is a number represented by 0.1≤y≤1.0.) 

固体氧化物电池堆紧固装置以及使用该固体氧化物电池堆紧固装置的固体氧化物反应装置

Publication No.:  CN121569379A 24/02/2026
Applicant: 
三星电机株式会社
CN_121569379_PA

Absstract of: WO2025095296A1

A solid oxide cell stack fastening apparatus, in which downward pressure applied to the solid oxide cell stack is uniform throughout, includes a housing which accommodates a solid oxide cell stack and includes a first coupling part on one side thereof, and a first block which includes a second coupling part and an elastic member in contact with the solid oxide cell stack. The first coupling part and the second coupling part each have screw threads coupled to each other.

膜电极组件及其制造方法

Publication No.:  CN121569377A 24/02/2026
Applicant: 
三星电机株式会社
CN_121569377_PA

Absstract of: WO2025105885A1

A membrane-electrode assembly includes a first catalyst electrode, a polymer electrolyte membrane covering a side surface and an upper surface of the first catalyst electrode, and a second catalyst electrode disposed on the polymer electrolyte membrane, in which at least a portion of a corner area in which the side surface and the upper surface of the first catalyst electrode are connected has a curved shape.

光触媒セル及び水素ガス生成システム

Publication No.:  JP2026030386A 20/02/2026
Applicant: 
シャープ株式会社
JP_2026030386_PA

Absstract of: US20260043150A1

A photocatalytic cell of the disclosure is installed in an inclined manner at an angle of 5° or more and 45° or less with respect to a horizontal plane. The photocatalytic cell includes: a translucent member; an electrolytic solution; a photocatalytic sheet including photocatalytic particles; an injection port through which the electrolytic solution is injected into an inside of the photocatalytic cell; a discharge port through which the electrolytic solution is discharged to an outside of the photocatalytic cell; and an exhaust port through which gas inside the photocatalytic cell is discharged, at least a part of the photocatalytic sheet is immersed in the electrolytic solution, a position of the exhaust port is higher than a position of the injection port, a gap between a surface of the translucent member and a surface of the photocatalytic sheet is 5 mm or more and 50 mm or less in width, and the injection port and the discharge port allow the electrolytic solution to flow from an upper part toward a lower part in the gap between the translucent member and the photocatalytic sheet.

ELECTROLYSIS DEVICE AND METHOD WITH TURBINE COUPLED TO COMPRESSOR

Publication No.:  WO2026037594A1 19/02/2026
Applicant: 
BOSCH GMBH ROBERT [DE]
ROBERT BOSCH GMBH
WO_2026037594_PA

Absstract of: WO2026037594A1

The invention relates to an electrolysis device (10) having at least one electrolysis unit (12) for reducing a medium provided for the electrolysis, in particular water, an air supply line (20) for supplying air to the electrolysis unit (12), and an exhaust gas line (24) for discharging anode exhaust gases of the electrolysis unit (12). According to the invention, the air supply line (20) has a compressor (66) for increasing the pressure of the air, and the exhaust gas line (24) has a turbine (74) mechanically coupled to the compressor (66).

Elektrolysevorrichtung, Verfahren

Publication No.:  DE102024207827A1 19/02/2026
Applicant: 
BOSCH GMBH ROBERT [DE]
Robert Bosch Gesellschaft mit beschr\u00E4nkter Haftung
DE_102024207827_PA

Absstract of: DE102024207827A1

Die Erfindung betrifft eine Elektrolysevorrichtung (10) mit wenigstens einer Elektrolyseeinheit (12) zur Reduktion eines für die Elektrolyse vorgesehenen Mediums, insbesondere Wasser, mit einer Luftzuleitung (20) zur Zufuhr von Luft zur Elektrolyseeinheit (12), mit einer Abgasleitung (24) zur Ableitung von Anodenabgasen der Elektrolyseeinheit (12). Es wird vorgeschlagen, dass die Luftzuleitung (20) einen Verdichter (66) zur Druckerhöhung der Luft aufweist, die Abgasleitung (24) eine Turbine (74) aufweist, welche mechanisch mit dem Verdichter (66) gekoppelt ist.

ELECTROLYSER FOR HYDROGEN PRODUCTION

Publication No.:  AU2024330634A1 19/02/2026
Applicant: 
IND DE NORA S P A
INDUSTRIE DE NORA S.P.A
AU_2024330634_PA

Absstract of: AU2024330634A1

The present invention refers to an electrolyser (1) for the production of hydrogen from an alkaline electrolyte. The electrolyser (1) comprises a first header (2) and a second header (3) between which a plurality of elementary cells (4) and a plurality of bipolar plates (5) are stacked. Each bipolar plate (5) separates two adjacent elementary cells. The electrolyser (1) further comprises a plurality of clamping elements (20) that mechanically connect said headers (2, 3). Each of the elementary cells (4) comprises a frame (6) defining a chamber (6A), having an anodic section and a cathodic section, in which an anodic electrode (7) and a cathodic electrode (8) are at least in part housed. Each of the elementary cells (4) further comprise a separator element (10) that separates the anodic section from the cathodic section. According to the invention, each of the frames (6) comprises first through holes (61) and each of the bipolar plates (5) comprises second through holes (51), wherein each of said first through holes (61) of one frame (6) is mutually aligned with a corresponding first through holes (61) of each of the another frames (6) and with one of said second through holes (51) of each bipolar plate (5), wherein each one of said clamping means (20) extends through said through holes (51, 61) mutually aligned.

ELECTRODE CONTAINING OXYGEN GENERATING ELECTRODE CATALYST

Publication No.:  AU2024328340A1 19/02/2026
Applicant: 
TOSOH CORP
RIKEN
TOSOH CORPORATION,
RIKEN
AU_2024328340_A1

Absstract of: AU2024328340A1

Provided is an electrode exhibiting high oxygen generating electrode catalytic activity as compared with conventional electrodes using manganese-based oxide as an oxygen generating electrode catalyst.

A separator for alkaline water electrolysis

Publication No.:  AU2026200708A1 19/02/2026
Applicant: 
AGFA GEVAERT NV
Agfa-Gevaert NV
AU_2026200708_A1

Absstract of: AU2026200708A1

Abstract A separator for alkaline electrolysis (1) comprising a porous support (100) and a porous layer (200) provided on the porous support, characterized in that a lateral Bubble Point of the separator, measured according to the method described in the description, is at least 0.2 bar. Abstract an b s t r a c t a n

ELECTROLYZER CELL SYSTEMS AND METHOD OF OPERATING THEREOF BY WATER COOLING OF SYSTEM EXHAUST

Publication No.:  US20260049405A1 19/02/2026
Applicant: 
BLOOM ENERGY CORP [US]
BLOOM ENERGY CORPORATION
US_20260049405_PA

Absstract of: US20260049405A1

A method of operating an electrolyzer cell system includes providing a steam inlet stream to a stack of electrolyzer cells, generating a main product stream containing hydrogen and steam, and an oxygen exhaust stream in the stack, and providing liquid water into the main product stream to cool the main product stream.

METHOD FOR MANUFACTURING NANO METAL OXIDES AND HYDROGEN

Nº publicación: US20260048995A1 19/02/2026

Applicant:

TRUEECO TECH INC [TW]
trueECO Technology INC

US_20260048995_A1

Absstract of: US20260048995A1

A method for manufacturing nano metal oxides and hydrogen includes the following steps: Step A, providing a first reactor, and placing a metal material, an alcohol compound, and a first catalyst in the first reactor and applying heating thereto for reacting to generate a metal alkoxide compound, while simultaneously generating a substantial amount of hydrogen; and Step B, providing a second reactor, and, after the metal material in the first reactor has fully reacted in Step A, transferring remaining solution in the first reactor into the second reactor, and adding a second catalyst and a controlled amount of water, and applying appropriate heating to generate nano metal oxide in powder form. As such, effects of significant reduction of production cost, enhancement of safety, widespread application of hydrogen fuel cells, extremely low carbon emissions, being defined as “green hydrogen”, and reduction of storage costs and risks can be achieved.

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