An electrochemical cell for the continuous acidification of alkaline water sources and recovery of carbon dioxide with simultaneous continuous hydrogen gas production having a center compartment, an electrolyte-free anode compartment having a mesh anode in direct contact with an ion permeable membrane, an endblock in direct contact with the anode where the endblock provides a gas escape route behind the anode, an electrolyte-free cathode compartment having a mesh cathode in direct contact with an ion permeable membrane, and an endblock in direct contact with the cathode where the endblock provides a gas escape route behind the cathode. Current applied to the electrochemical cell for generating hydrogen gas also lowers the pH of the alkaline water to produce carbon dioxide with no additional current or power. Also disclosed is the related method for continuously acidifying alkaline water sources and recovering carbon dioxide with continuous hydrogen gas production.

An electrochemical reaction device, includes: an electrolytic solution tank including a first storage part to store a first electrolytic solution containing carbon dioxide, and a second storage part to store a second electrolytic solution containing water; a reduction electrode disposed in the first storing part; an oxidation electrode disposed in the second storing part; a porous body disposed in the first storing part; and a flow path connecting the porous body and an outside of the electrolytic solution tank to supply gas containing carbon dioxide to the porous body.

An automobile hydrogen oxygen generator includes an electrolytic hydrogen-oxygen generator, a motor, a battery, a filter and a circuit board. The electrolytic hydrogen-oxygen generator has water therein, an electrolytic tank connected to the battery, a relay sandwiched between the electrolytic tank and the battery and connected to the circuit board which is connected to an ignition switch. The filter is connected to the motor via air inlet and the electrolytic hydrogen-oxygen generator is connected to the air inlet via an air conduit.

An object of the present invention is to provide a photocatalyst for water splitting, which can form a water splitting device that is excellent in durability and responsiveness to visible light and excellent in the amount of generated gas, and a water splitting device having the photocatalyst for water splitting. A photocatalyst for water splitting according to the embodiment of the present invention is a photocatalyst for water splitting, which is used for an electrode that generates gas by irradiation with light in a state of being immersed in water, and includes a compound represented by a formula, (Ln).sub.2CuO.sub.4. In the formula, Ln represents a lanthanoid, and a part of Ln's may be substituted with an element of Groups II to IV of the periodic table.

An electrolysis method comprising an electrolysis cell (4), which method uses at least one recirculating flushing medium (50, 60). The invention further relates to an electrolysis system, in particular for carrying out the electrolysis method.

A carbon dioxide electrolytic device comprises an electrolysis cell including: a cathode to reduce a first substance containing carbon dioxide and thus produce a first product containing a carbon compound; a cathode flow path which faces the cathode and through which a gas containing the carbon dioxide flows; an anode to oxidize a second substance containing water or a hydroxide and thus produce a second product containing oxygen; an anode flow path which faces the anode and through which an electrolytic solution containing the water or the hydroxide flows; a water-repellent porous body which faces the anode flow path and through which the second product flows; and a separator provided between the anode and the cathode.

Described herein is a plurality of acicular particles dispersed with ionomer binder for use in an electrolyzer. The acicular particles comprise a microstructured core with a layer of catalytic material on at least one portion of the surface of the microstructured core. The catalytic material comprises iridium and the microstructured core comprises at least one of a polynuclear aromatic hydrocarbon and heterocyclic compounds. The acicular particles are substantially free of platinum.

An assembly of electrochemical cells for an electrochemical reactor, including a first electrochemical cell, including a first membrane/electrode assembly including a first anode and a first cathode on either side of a proton exchange membrane; first and second flow guides positioned on either side of the first assembly; a second electrochemical cell, including a second membrane/electrode assembly including a second anode and a second cathode on either side of a proton exchange membrane; third and fourth flow guides on either side of the second membrane/electrode assembly; the first and third flow guides have one and the same geometry; the first anode and the second anode have different distributions of surface densities of electrocatalytic material on respective faces of the first and second proton exchange membranes.

A solar fuels generator includes an anolyte and a catholyte in contact with a separator. The separator is configured such that the pH of the anolyte and the pH of the catholyte are each held at a steady state pH level during operation of the solar fuels generator. The steady state pH level of the anolyte is different from the steady state pH level of the catholyte.

An ion conducting membrane comprises an anion exchange layer, a cation exchange layer, and at least one flow channel formed between the anode exchange layer and the cation exchange layer. The anion exchange layer contacts the cation exchange layer. The resulting membrane exhibits low carbon dioxide crossover.