Abstract: Provided is a quaternary ammonium salt having a specific structure, an organic structure-directing agent containing the quaternary ammonium salt, and a method for producing the quaternary ammonium salt. Also, provided is a CON-type zeolite, which is a mixed crystal in which a molar ratio (Si/Al) of silicon (Si) and aluminum (Al) is 200 or more and 2000 or less, and which contains 25 mass % or more of Polymorph A, a catalyst containing a CON-type zeolite, and a method for producing a lower olefin using the catalyst.

Abstract: The present invention addresses the problem of providing a bonded body which has a high airtightness and exhibits excellent durability under high-temperature and high-pressure conditions. This problem is solved by a bonded body in which a complex of a zeolite and an inorganic porous support, and a dense member are bonded together by an inorganic glass or an inorganic adhesive. The inorganic glass or the inorganic adhesive has a thermal expansion coefficient of 30×10?7/K to 90×10?7/K, and the inorganic glass has a softening point of 550° C. or lower. The present invention also addresses the problem of providing a method of efficiently producing an alcohol by installing a separation membrane in an alcohol synthesis reactor based on a bonding method that gives good sealing performance and durability under high-temperature and high-pressure conditions and in the presence of methanol vapor.

Abstract: A composite separation structure may include a substrate section, a first separation section disposed in contact with the substrate section, and a second separation section disposed not in contact with the substrate section but in contact with the first separation section. The second separation section may be amorphous and have a thickness from an end portion in contact with the first separation section to the opposite end portion of 5 nm or more and 200 nm or less. Such a composite separation structure may be capable of separating gases having various small kinetic diameters (kinetic diameters) with high separability, and particularly capable of realizing the separation or concentration of a gas mixture containing a gas having a kinetic diameter of 4 ? or less.

Abstract: Provided is a photocatalyst with significantly enhanced water splitting performance in YTOS or in a composition in which the yttrium element of YTOS has been replaced with another element. Also provided is a method for producing a photocatalyst that has a composition represented by the following general formula (I), the method including mixing, with a raw material of the photocatalyst, a flux component at a mass ratio of 0.01 times to 50 times, the flux component being composed of one or more chlorides and/or iodides of at least one selected from Li, Na, K, Rb, Mg, Ca, Sr, and Ba, and calcining a resultant product at 450° C. to 1050° C.: MaTibOcSd??(I) (where M is a combination of one or more selected from Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Y, a is a number of 1.7 to 2.3, b is a number of 2, c is a number of 4.7 to 5.3, and d is a number of 1.7 to 2.3).

Abstract: A CON zeolite satisfying the following (1) to (2): (1) The framework is CON as per the code specified by the International Zeolite Association (IZA); and (2) It contains silicon and aluminum, and the molar ratio of aluminum to silicon is 0.04 or more.

Abstract: The present invention provides a method of producing a composite photocatalyst having a remarkable water splitting activity, which is capable of efficiently loading a co-catalyst having a small particle size in a highly dispersed manner on a surface of an optical semiconductor. According to the present invention, the method of producing a composite photocatalyst from a plurality types of optical semiconductors includes a step of heating a solid-liquid mixture containing a solvent, a co-catalyst or a co-catalyst source, and a plurality of types of optical semiconductors by irradiating the solid-liquid mixture with microwave.

Abstract: A method foe producing a transparent electrode for oxygen production having a Ta nitride layer on a transparent substrate, including: a step of forming a Ta nitride precursor layer on the transparent substrate; and a step of nitriding the Ta nitride precursor layer with a mixed gas containing ammonia and a carrier gas.

Abstract: A method for producing a transparent electrode for oxygen production having a Ta nitride layer on a transparent substrate, including: a step of forming a Ta nitride precursor layer on the transparent substrate; and a step of nitriding the Ta nitride precursor layer with a mixed gas containing ammonia and a carrier gas.

Abstract: The present invention addresses the problem of providing a bonded body which has a high airtightness and exhibits excellent durability under high-temperature and high-pressure conditions. This problem is solved by a bonded body in which a complex of a zeolite and an inorganic porous support, and a dense member are bonded together by an inorganic glass or an inorganic adhesive. The inorganic glass or the inorganic adhesive has a thermal expansion coefficient of 30×10?7/K to 90×10?7/K, and the inorganic glass has a softening point of 550° C. or lower. The present invention also addresses the problem of providing a method of efficiently producing an alcohol by installing a separation membrane in an alcohol synthesis reactor based on a bonding method that gives good sealing performance and durability under high-temperature and high-pressure conditions and in the presence of methanol vapor.

Abstract: Provided are a photocatalyst electrode for oxygen generation exhibiting a satisfactory onset potential, and a module including this photocatalyst electrode. The photocatalyst electrode for oxygen generation includes a current collector layer; a photocatalyst on the current collector layer; and a promoter supported on at least a portion of the photocatalyst, in which the promoter contains a first metal oxide having an oxygen generation overvoltage of 0.4 V or lower, and a second metal oxide having an oxygen generation overvoltage of higher than 0.4 V.

Abstract: 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)2CuO4. 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.

Abstract: An object of the present invention is to provide a photocatalytic electrode for water splitting and a water splitting device excellent in the onset potential. The water splitting device of the present invention is a water splitting device which generates gases from a photocatalytic electrode for hydrogen generation and a photocatalytic electrode for oxygen generation by irradiating the photocatalytic electrode for hydrogen generation and the photocatalytic electrode for oxygen generation with light, and includes a bath to be filled with an electrolytic aqueous solution and the photocatalytic electrode for hydrogen generation and the photocatalytic electrode for oxygen generation each disposed in the bath. The photocatalytic electrode for hydrogen generation has a p-type semiconductor layer, an n-type semiconductor layer provided on the p-type semiconductor layer, and a co-catalyst provided on the n-type semiconductor layer.

Abstract: An object of the invention is to provide a water splitting device having a low electrolysis voltage and excellent gas separation performance. The water splitting device of the invention is a water splitting device that generates gases from the positive electrode and the negative electrode, the water splitting device including: a bath to be filled with an electrolytic aqueous solution; the positive electrode and the negative electrode disposed in the bath; and a polymer membrane that is ion-permeable and is disposed between the positive electrode and the negative electrode in order to separate the electrolytic aqueous solution filling the bath into the positive electrode side and the negative electrode side, wherein the positive electrode and the negative electrode are installed at a predetermined distance from the polymer membrane, and the moisture content of the polymer membrane is 40% or more.

Abstract: A method for producing a transparent electrode for oxygen production having a Ta nitride layer on a transparent substrate, including: a step of forming a Ta nitride precursor layer on the transparent substrate; and a step of nitriding the Ta nitride precursor layer with a mixed gas containing ammonia and a carrier gas.

Abstract: A CON zeolite satisfying the following (1) to (2): (1) The framework is CON as per the code specified by the International Zeolite Association (IZA); and (2) It contains silicon and aluminum, and the molar ratio of aluminum to silicon is 0.04 or more.

Abstract: Provided are an artificial photosynthesis module electrode with high efficiency and an artificial photosynthesis module having the artificial photosynthesis module electrode. The artificial photosynthesis module electrode has a first electrode that decomposes a raw material fluid with light to obtain a first fluid, a first conductive member connected to the first electrode, a second electrode that decomposes the raw material fluid with light to obtain the second fluid, and a second conductive member connected to the second electrode. The first electrode has a plurality of first electrode parts connected to the first conductive member and disposed with a gap in a first direction on a first plane. The second electrode has a plurality of second electrode parts connected to the second conductive member and disposed with a gap in the first direction on a second plane parallel to or identical to the first plane.

Abstract: A zeolite catalyst capable of maintaining a high conversion of raw materials over a long period of time, and a method of producing a lower olefin stably over a long period of time using the zeolite catalyst is to be provided. A CON zeolite catalyst containing aluminum (Al) as a constituent element, wherein the CON zeolite catalyst has a ratio ((A2/A1)×100 (%)) of an integrated intensity area (A2) of signal intensity in a range from 57.5 ppm to 70 ppm to an integrated intensity area (A1) of signal intensity in a range from 45 ppm to 70 ppm is not less than 49.0% when analyzed by 27Al-MAS-NMR is prepared, and a lower olefin is produced by a MTO process using the zeolite catalyst.

Abstract: A gas production apparatus is provided which includes: a module including a plurality of PN junctions connected in series to one another, each being formed of an inorganic semiconductor and having a light receiving surface; two gas generators that are provided at open ends of PN junctions at both extremities of the module, respectively, on a side of the light receiving surface; an electrolysis chamber which contains an aqueous electrolytic solution in contact with the two gas generators and contains gases generated by the two gas generators; and a diaphragm which is ion-permeable but gas-impermeable, and partitions the electrolysis chamber into two regions including the two gas generators, respectively, and containing hydrogen and oxygen, respectively.

Abstract: The present invention has an object to provide a photocatalyst electrode for oxygen generation having excellent photocurrent density, a production method for a photocatalyst electrode for oxygen generation and a module, and the photocatalyst electrode for oxygen generation of the present invention includes a current collector layer and a photocatalyst layer containing Ta3N5, wherein the photocatalyst electrode for oxygen generation has a charge separation promotion layer between the current collector layer and the photocatalyst layer.

Abstract: Provided is an artificial-photosynthesis module, which decomposes an aqueous electrolyte solution into hydrogen and oxygen by means of light, including a photoelectric conversion unit that receives light to generate electrical energy; a hydrogen gas generating part that decomposes the aqueous electrolyte solution, using the electrical energy of the photoelectric conversion unit, and generates hydrogen gas; and an oxygen gas generating part that decomposes the aqueous electrolyte solution, using the electrical energy of the photoelectric conversion unit, and generates oxygen gas. The photoelectric conversion unit, the hydrogen gas generating part, and the oxygen gas generating part are electrically connected in series, and the hydrogen gas generating part and the oxygen gas generating part are arranged within an electrolytic chamber to which the aqueous electrolyte solution is supplied. The hydrogen gas generating part has an inorganic semiconductor film having a pn junction.