Photoelectrochemical cells including a cathode including alpha-hematite and a metal dichalcogenide, an anode including a conducting polymer, and an electrolyte.

A platform technology that uses a novel membrane electrode assembly, including a cathode layer, an anode layer, a membrane layer arranged between the cathode layer and the anode layer, the membrane conductively connecting the cathode layer and the anode layer, in a CO.sub.x reduction reactor has been developed. The reactor can be used to synthesize a broad range of carbon-based compounds from carbon dioxide and other gases containing carbon.

The present invention discloses a method for preparing an ultra-thin Ni—Fe-MOF nanosheet, which comprises the steps of dissolving an organic ligand in an organic solvent, dripping the resulting solution to an aqueous solution containing a nickel salt and an iron salt, mixing uniformly and reacting at 140-160° C. for 3-6 h to obtain the ultra-thin Ni—Fe-MOF nanosheet, wherein the organic ligand is terephthalic acid and/or disodium terephthalate, and the organic solvent is N,N-dimethylacetamide and/or N,N-dimethylformamide. The present invention discloses an ultra-thin Ni—Fe-MOF nanosheet, and use thereof. The preparation method does not require a surfactant, the surface of the product is neat and easy to be cleaned, and the large-scale synthesis of 2D ultra-thin MOF materials can be realized.

Provided is an electrode for electrolysis and a preparation method of the same. The electrode for electrolysis has an improved needle-like structure of a rare earth metal compared to conventional electrodes, and thus detachment of catalytic materials is reduced, so that the electrode is excellent in durability such as exhibiting stable performance even in a reverse current flow. Further, since the electrode for electrolysis has a low overvoltage value, an overvoltage required amount of the electrolytic cell can be remarkably reduced. In addition, an electrode for electrolysis having the above effect can be prepared without introducing additional precursors or changing manufacturing facilities.

Provided is an electrode for electrolysis and a preparation method of the same. The electrode for electrolysis has an improved needle-like structure of a rare earth metal compared to conventional electrodes, and thus detachment of catalytic materials is reduced, so that the electrode is excellent in durability such as exhibiting stable performance even in a reverse current flow. Further, since the electrode for electrolysis has a low overvoltage value, an overvoltage required amount of the electrolytic cell can be remarkably reduced. In addition, an electrode for electrolysis having the above effect can be prepared without introducing additional precursors or changing manufacturing facilities.

Disclosed are, inter alia, an electrode for oxygen evolving, a method of preparing the electrode, and an oxygen generating device including the electrode. The electrode for oxygen evolving includes a metal nanocluster including a core formed of metal atoms and an organic thiol-containing ligand bound to a surface of the core, and a metal support to which the metal nanocluster is fixed.

According to various exemplary embodiments of the present invention, e.g., by using the electrode, a non-precious metal/non-carbon catalyst may be used as a catalyst for oxygen evolving, which is a half reaction of alkaline water electrolysis, oxygen evolving activity and high stability may be substantially improved, a catalyst usage amount may be minimized by increasing dispersibility of a catalyst in an electrode, and an efficiency of an oxygen evolving device may be increased by increasing a surface area of an electrode and decreasing electrolyte resistance.

Provided is a low-cost catalyst that has excellent oxygen reduction reaction (ORR) catalytic activity and is useful as a catalyst for water electrolysis, an electrode catalyst for an air battery, or the like. The catalyst includes (A) Ni atoms, (B) a condensate of thiourea and formaldehyde, and (C) porous carbon.

An electrode and a method for fabricating the same is disclosed. For example, the method to fabricate the electrode includes preparing a deposition composition comprising amine-functionalized silver nanoparticles and a solvent and depositing the deposition composition onto an electrically conductive substrate. The electrode can be deployed in a gas diffusion electrode.

The present disclosure relates to an electrolysis catalyst including a graphitic carbon layer; and a first metal and a second metal oxide dispersed in the graphitic carbon layer, wherein the first metal is electron-deficient.

An object of the present invention is to provide an electrolysis technique such that the electrolysis performance is unlikely to be deteriorated, and excellent catalytic activity is retained stably over a long period of time even when electric power having a large output fluctuation, such as renewable energy, is used a power source, and this object is realized by an alkaline water electrolysis method, in which an electrolytic solution obtained by dispersing a catalyst containing a hybrid cobalt hydroxide nanosheet (Co-NS) being a composite of a metal hydroxide and an organic substance is supplied to an anode chamber and a cathode chamber that form an electrolytic cell, and the electrolytic solution is used for electrolysis in each chamber in common, and an alkaline water electrolysis anode.