To provide a hydrogen system operation planning device capable of accurately preparing an operation plan that achieves efficient operation in a hydrogen system. In the hydrogen system operation planning device of the embodiment, a classification unit receives input of DR commands regarding demand for electric power in the hydrogen system and classifies the input DR commands into a first DR group and a second DR group with a lower priority than the first DR group. A first planning unit prepares a first operation plan to reflect the DR command classified into the first DR group. A second planning unit prepares a second operation plan by reflecting contents of the DR command classified into the second DR group on the first operation plan so that contents of the DR command classified into the first DR group have priority over the contents of the DR command classified into the second DR group.

To provide a hydrogen system operation planning device capable of accurately preparing an operation plan that achieves efficient operation in a hydrogen system. In the hydrogen system operation planning device of the embodiment, a classification unit receives input of DR commands regarding demand for electric power in the hydrogen system and classifies the input DR commands into a first DR group and a second DR group with a lower priority than the first DR group. A first planning unit prepares a first operation plan to reflect the DR command classified into the first DR group. A second planning unit prepares a second operation plan by reflecting contents of the DR command classified into the second DR group on the first operation plan so that contents of the DR command classified into the first DR group have priority over the contents of the DR command classified into the second DR group.

A fuel cell and a method for regenerating this fuel cell, including a supply of the fuel cell by the main supply conduit by a fluid having a nominal flow rate and a nominal molar fraction of combustion agent, during a regeneration phase of a given group, a switching of the inlet, outlet and recirculation switches of the fluid circuit so as to supply the given group from the recirculation line of the given group and from a fluid discharge line of at least one other group, an application of a regeneration voltage Ve to the cells of the given group, Ve being less than or equal to 0.3V.

A fuel cell and a method for regenerating this fuel cell, including a supply of the fuel cell by the main supply conduit by a fluid having a nominal flow rate and a nominal molar fraction of combustion agent, during a regeneration phase of a given group, a switching of the inlet, outlet and recirculation switches of the fluid circuit so as to supply the given group from the recirculation line of the given group and from a fluid discharge line of at least one other group, an application of a regeneration voltage Ve to the cells of the given group, Ve being less than or equal to 0.3V.

Disclosed are an electrode for gas generation, a method of preparing the electrode, and a device including the electrode for gas generation. The electrode includes a gas generating electrode layer and a three-dimensional (3D) super-aerophobic layer formed on at least one portion of the gas generating electrode layer and including porous hydrogel.

A method for capturing carbon dioxide comprises introducing a first feed stream comprising carbon dioxide and dioxygen into a first electrochemical cell, reducing the carbon dioxide to carbonate ions at a first cathode of the first electrochemical cell, and reducing the carbonate ions at a first anode to produce a first product stream comprising concentrated carbon dioxide and a second product stream comprising water. A second feed stream comprising water is introduced to a second electrochemical cell coupled to the first electrochemical cell. The water is oxidized at a second anode of the second electrochemical cell to produce hydrogen ions and dioxygen gas, the hydrogen ions are reduced to hydrogen gas at a second cathode, and the hydrogen gas produced by the second cathode is transported to the first anode. The first product stream is removed from the first electrochemical cell. Additional methods and related systems are also disclosed.

A method for capturing carbon dioxide comprises introducing a first feed stream comprising carbon dioxide and dioxygen into a first electrochemical cell, reducing the carbon dioxide to carbonate ions at a first cathode of the first electrochemical cell, and reducing the carbonate ions at a first anode to produce a first product stream comprising concentrated carbon dioxide and a second product stream comprising water. A second feed stream comprising water is introduced to a second electrochemical cell coupled to the first electrochemical cell. The water is oxidized at a second anode of the second electrochemical cell to produce hydrogen ions and dioxygen gas, the hydrogen ions are reduced to hydrogen gas at a second cathode, and the hydrogen gas produced by the second cathode is transported to the first anode. The first product stream is removed from the first electrochemical cell. Additional methods and related systems are also disclosed.

Functionalized catalysts for use in a hydrogen evolution reaction (HER) contain nanoparticles containing a transition metal enveloped in layers of graphene, which renders the nanoparticles resistant to passivation while maintaining an optimal ratio of transition metal and transition metal oxide in the nanoparticles. The catalysts can be utilized with anionic exchange polymer membranes for hydrogen production by alkaline water electrolysis.

Functionalized catalysts for use in a hydrogen evolution reaction (HER) contain nanoparticles containing a transition metal enveloped in layers of graphene, which renders the nanoparticles resistant to passivation while maintaining an optimal ratio of transition metal and transition metal oxide in the nanoparticles. The catalysts can be utilized with anionic exchange polymer membranes for hydrogen production by alkaline water electrolysis.

An electrolyzer system including a hotbox, one or more stacks disposed within the hotbox, a fuel exhaust conduit that receives fuel exhaust output by the stack, a fuel exhaust separator that separates liquid from the fuel exhaust, and a recycling conduit that fluidly connects the fuel exhaust to the fuel inlet conduit.