An electrode (1) comprising a metal coil (5), wherein the metal coil (5) comprises a metal selected from copper, silver, gold, nickel and aluminium, wherein turns of the metal coil (5) are separated by a gap.

A proton-conductive solid electrolyte member has an electrolyte layer and an anode layer. The electrolyte layer contains a metal oxide having a perovskite crystal structure. The anode layer contains Fe.sub.2O.sub.3 and the metal oxide. The metal oxide is a metal oxide expressed by the following formula [1], or a mixture or a solid solution of a metal oxide expressed by the following formula [1]: A.sub.aB.sub.bM.sub.cO.sub.3-, where A denotes one element selected from the group consisting of Ba and Ca; B denotes one element selected from the group consisting of Ce and Zr; M denotes one element selected from the group consisting of Y, Yb, Er, Ho, Tm, Gd, In, and Sc; a is a number satisfying 0.85a1; b is a number satisfying 0.50b1; c is a number satisfying c=1b; and is an oxygen deficiency amount.

An electrochemical device and method can include techniques involving bipolar membrane electrolysis to transform an input product into an output product. Some embodiments can include a gas-diffusion electrode as a cathode, a bipolar membrane configured to facilitate autodissociation, and an anode that can be configured as a liquid-electrolyte style electrode or a gas-diffusion electrode. In some embodiments the electrochemical device can be configured as a CO.sub.2 electrolyzer that is designed to utilize input product including carbon dioxide gas and water to generate output products that can include gaseous carbon monoxide or other reduction products of carbon dioxide and gaseous oxygen or the oxidation products of a depolarizer such as hydrogen, methane, or methanol. Embodiments can be utilized in the production of fuels or feedstocks for fuels and carbon-containing chemicals, in air purification systems, flue gas treatment devices, and other machines and facilities.

The present invention relates to an oxygen generating apparatus comprising: a membrane-electrode assembly including an anode connected to a first pole of a power supply device, a cathode connected to a second pole of the power supply device, and an electrolyte membrane provided between the anode and the cathode; a water supply source for supplying water to the anode; and an oxygen supply unit for supplying oxygen to the cathode, wherein oxygen (O.sub.2) is generated at the anode by using an oxygen evolution reaction (OER) and water (H.sub.2O) is generated at the cathode by using an oxygen reduction reaction (ORR). The present invention may provide an apparatus for electrochemically generating oxygen, which uses an electrochemical method and thus can generate oxygen without noise or vibration, and has a simple configuration capable of reducing the volume of the apparatus.

Inspired by the discovery that environmental heat energy can be isothermally utilized through electrostatically localized protons at a liquid-membrane interface to do useful work such as driving ATP synthesis, the present invention discloses an innovative energy renewal method with making and using an asymmetric function-gated isothermal electricity production system comprising at least one pair of a low work function thermal electron emitter and a high work function electron collector across a barrier space installed in a container with electric conductor support to enable energy recycle process functions with utilization of environmental heat energy isothermally for at least one of: a) utilization of environmental heat energy for energy renewing of fully dissipated waste heat energy from the environment to generate electricity to do useful work; b) providing a novel cooling function for a new type of refrigerator by isothermally extracting environmental heat energy from inside the refrigerator while generating isothermal electricity.

The disclosure relates to recovering Li ions in a raw liquid into a recovery liquid at a high recovery speed. A lithium selective permeable membrane is constituted of a selective permeable membrane main body constituted of a lithium ion superconductor (ion conductor) having a particularly high ion conductivity and a Li adsorption layer formed as a thin layer on a raw liquid side (a first electrode) thereof. As a material constituting the selective permeable membrane main body, specifically, lanthanum lithium titanium oxide can be used. The Li adsorption layer is formed as a thin layer on a surface of the selective permeable membrane main body by carrying out a chemical treatment on the selective permeable membrane main body.

A method includes operating a water electrolysis device for producing hydrogen and oxygen from water. A PEM electrolyzer (1) is integrated in a water circuit (4) in the electrolysis device. The water circuit (4) feeds reaction water as well as discharges excess water. The water circuit (4) is lead past the PEM electrolyzer (1) via a bypass conduit (14) on starting up the water electrolysis device.

A reinforced separator for alkaline hydrolysis includes a porous support, a first porous polymer layer contiguous with one side of the support and a second porous polymer layer contiguous with the other side of the support, characterized in that the maximum pore diameter at the outer surface of the first porous polymer layer PD.sub.max(1) and of the second porous polymer layer PD.sub.max(2) are different from each other and wherein a ratio between PD.sub.max(2) and PD.sub.max(1) is between 1.25 and 10.

Devices for manufacturing hydrogen water without a water storage tank include: a water supply line receiving raw water; an electrolysis part including an oxygen generating chamber and a hydrogen generating chamber individually receiving the raw water. Electrolysis is performed in the oxygen and hydrogen generating chambers. A dissolving part is provided to receive the generated hydrogen and the raw water discharged by a pump and increase a dissolution rate of the hydrogen. A water discharge line outputs the hydrogen water discharged from the dissolving part. The water discharge line includes a large diameter line to decrease a pressure of the hydrogen water output; and a small diameter line provided has an inner diameter less than an inner diameter of the large diameter line and connects an outlet of the dissolving part and an inlet of the large diameter line.

Selective alloy corrosion is used to synthesize a robust and ultrafine mesoporous NiFeMn-based metal/metal oxide oxygen evolving catalyst with ligament and pore sizes in the range of 10 nm and a BET surface area of 43 m.sup.2/g. As an oxygen evolving catalyst, the mesoporous catalyst exhibits high stability (>264 hours) at a high current density (500 mA/cm.sup.2) with a low overpotential (360 mV) using a moderate electrolyte concentration (1 M KOH). The catalyst is made from non-precious metals and its fabrication is straight forward and directly applicable to large-scale synthesis.