An electrochemical hydrogen pump according to the present disclosure includes: a cell including an electrolyte membrane, an anode disposed on a first main surface of the electrolyte membrane, and a cathode disposed on a second main surface of the electrolyte membrane; a voltage applicator applying a voltage between the anode and the cathode, the voltage applicator applying the voltage to cause the electrochemical hydrogen pump to transfer hydrogen in hydrogen-containing gas supplied to the anode to the cathode and to pressurize the hydrogen; and a controller, when at least one selected from the group consisting of a dew point of the hydrogen-containing gas supplied to the anode and a temperature of the cell is increased, controlling the voltage applied by the voltage applicator to increase a current flowing between the anode and the cathode.

An electrochemical hydrogen pump according to the present disclosure includes: a cell including an electrolyte membrane, an anode disposed on a first main surface of the electrolyte membrane, and a cathode disposed on a second main surface of the electrolyte membrane; a voltage applicator applying a voltage between the anode and the cathode, the voltage applicator applying the voltage to cause the electrochemical hydrogen pump to transfer hydrogen in hydrogen-containing gas supplied to the anode to the cathode and to pressurize the hydrogen; and a controller, when at least one selected from the group consisting of a dew point of the hydrogen-containing gas supplied to the anode and a temperature of the cell is increased, controlling the voltage applied by the voltage applicator to increase a current flowing between the anode and the cathode.

A method for preparing a catalytic material of an electrode for electrochemical reduction reactions, which comprises: a) a step of electrolysis of at least one aqueous and/or organic solution comprising at least one precursor of the active phase comprising at least one group VIB metal in order to obtain a solution comprising at least one precursor comprising at least one group VIB metal which has been partially reduced; b) a step of impregnation of said support with said solution obtained in step a) in order to obtain a catalytic material precursor; c) a step of drying said precursor obtained in step b) at a temperature below 250° C., without subsequent calcination; d) a step of sulfurization of the catalytic material precursor obtained in step c) at a temperature of between 100° C. and 600° C.

A method for preparing a catalytic material of an electrode for electrochemical reduction reactions, which comprises: a) a step of electrolysis of at least one aqueous and/or organic solution comprising at least one precursor of the active phase comprising at least one group VIB metal in order to obtain a solution comprising at least one precursor comprising at least one group VIB metal which has been partially reduced; b) a step of impregnation of said support with said solution obtained in step a) in order to obtain a catalytic material precursor; c) a step of drying said precursor obtained in step b) at a temperature below 250° C., without subsequent calcination; d) a step of sulfurization of the catalytic material precursor obtained in step c) at a temperature of between 100° C. and 600° C.

The invention relates to the field of chemical technology and relates in particular to devices for electrolyzing aqueous alkali metal chloride solutions to obtain chlorine, chlorine compounds, oxygen, ozone as well as hydroperoxide compounds and can be used for disinfection in the medical, pharmaceutical and food industries as well as in the purification and sterilization of water by aqueous solutions of hypochlorous and hydroperoxide oxidizing agents.

Provided are methods of making aliphatic or aromatic compounds (e.g., small molecules or polymers) having one or more amine groups and/or imine groups. A method of the present disclosure is an electrohydrogenation method, where a potential is applied to an aliphatic or aromatic compound (e.g., small molecule or polymer) having one or more nitrile groups, where after the potential is applied one or more of the nitrile groups are reduced to an amine or imine. The electrohydrogenation may be carried out using non-pulsed or pulsed potential waveforms.

Provided are methods of making aliphatic or aromatic compounds (e.g., small molecules or polymers) having one or more amine groups and/or imine groups. A method of the present disclosure is an electrohydrogenation method, where a potential is applied to an aliphatic or aromatic compound (e.g., small molecule or polymer) having one or more nitrile groups, where after the potential is applied one or more of the nitrile groups are reduced to an amine or imine. The electrohydrogenation may be carried out using non-pulsed or pulsed potential waveforms.

A carbon dioxide electrolytic device includes: a carbon dioxide electrolysis cell having a cathode and an anode flow path, a cathode, an anode, and a first diaphragm; a first current regulator to supply a first current; a first gas/liquid separator to separate a first fluid from the anode flow path into a first liquid and gas; an electrodialysis cell having, first and second electrodes, first to fourth rooms, and second to fourth diaphragms; a second current regulator to supply a second current; at least one detector out of a first detector to detect a flow rate of the first gas or a concentration of carbon dioxide in the first gas, and a second detector to detect a pH or a concentration of at least one ion in the first fluid; and a first controller to regulate a second current, in accordance with at least one detection signal.

A carbon dioxide electrolytic device includes: a carbon dioxide electrolysis cell having a cathode and an anode flow path, a cathode, an anode, and a first diaphragm; a first current regulator to supply a first current; a first gas/liquid separator to separate a first fluid from the anode flow path into a first liquid and gas; an electrodialysis cell having, first and second electrodes, first to fourth rooms, and second to fourth diaphragms; a second current regulator to supply a second current; at least one detector out of a first detector to detect a flow rate of the first gas or a concentration of carbon dioxide in the first gas, and a second detector to detect a pH or a concentration of at least one ion in the first fluid; and a first controller to regulate a second current, in accordance with at least one detection signal.

An electrochemical reaction device includes: an electrode layer including a cathode, an ion exchange membrane, and an anode that are stacked in this order; a first flow path structure including an anode-specific flow path as a passage for an electrolytic solution defined by a surface on one side and a cathode-specific flow path as a passage for an electrolytic solution containing dissolved carbon dioxide defined by a surface on the other side; and a second flow path structure including an anode-specific flow path as a passage for an electrolytic solution defined by a surface on one side and a cathode-specific flow path as a passage for an electrolytic solution containing dissolved carbon dioxide defined by a surface on the other side. The first flow path structure, the electrode layer, the second flow path structure, and the electrode layer are stacked in this order repeatedly to form an electrolytic cell stacking structure.