Abstract: A method for preparing a reduction catalyst for water electrolysis using protective coating; a reduction electrode for alkaline water electrolysis comprising a reduction catalyst prepared thereby, and an alkaline water electrolysis system are disclosed. The method for preparing a reduction catalyst for water electrolysis applies a protective coating method and suppresses the growth of alloy particles in a subsequent high-temperature heat treatment step, and, thus, can prepare and provide a catalyst with a high alloying degree. As a result, a non-novel metal alloy catalyst prepared according to the method of the present invention has excellent catalytic characteristics by exhibiting hydrogen evolution reaction (HER) performance similar to that of platinum, which is a noble metal catalyst.

Abstract: An intake/exhaust device of an apparatus for continuously growing a silicon ingot is disclosed.

Abstract: The present invention relates to a polyolefin and a film molded therefrom. Specifically, the present invention relates to a polyolefin, particularly a linear low-density polyethylene, which is prepared by a hybrid catalyst comprising different transition metal compounds and has excellent processability, impact strength, and haze, and to a film prepared therefrom.

Abstract: The present invention relates to a perovskite solar cell and a tandem solar cell comprising the same, characterized in that the perovskite solar cell comprises: a substrate; a transparent electrode; a hole transport layer; a perovskite light absorption layer, an electron transport layer; and a metal electrode, wherein the electron transport layer is a graded thin film in which a chemical binding state of elements constituting the electron transport layer gradually changes from the lower portion thereof toward the upper portion thereof.

Abstract: Provided are a composition having excellent gas barrier property and low-temperature impact resistance, and a liner for high-pressure gas storage tanks containing the same. Particularly, provided are a composition, in which resin particles reinforcing low-temperature impact resistance are dispersed in a gas barrier resin, thereby having excellent gas barrier property and excellent impact resistance while being easily moldable, and a liner for high-pressure gas storage tanks.

Abstract: The present invention relates to a method and apparatus for classifying images of solar battery cells. The method according to an exemplary embodiment of the present invention is performed by an electronic apparatus, and is a method for determining whether a solar battery cell being inspected is defective, based on an electroluminescence (EL) image of the solar battery cell being inspected.

Abstract: The present invention relates to a catalyst for hydrogenation and a method for preparing the same, and more specifically, provides a catalyst having improved activity by including copper and copper oxide as a promoter when a hydrogenation catalyst including nickel is prepared by using a deposition-precipitation (DP) method. Accordingly, a catalyst having high activity may be provided in a hydrogenation process of a hydrocarbon resin.

Abstract: An ingot growth apparatus according to an embodiment of the present invention comprises: a growth furnace having a main crucible which is disposed within the growth furnace and holds molten silicon therein in order to grow an ingot; a preliminary melting part having a preliminary crucible which is supplied with a solid silicon material, melts the solid silicon material, and supplies the molten silicon to the main crucible; a temperature detection sensor which is disposed above the preliminary melting part and detects the temperature of the solid silicon material or molten silicon held in the preliminary melting part; and a control part which controls supply of the molten silicon from the preliminary crucible to the main crucible on the basis of the temperature detected by the temperature detection sensor.

Abstract: Provided are a hydrogenation reaction catalyst and a preparation method therefor, and more particularly, to a hydrogenation reaction catalyst including sulfur as a promoter, thereby selectively hydrogenating an olefin by changing a relative hydrogenation rate of the olefin and an aromatic group during a hydrogenation reaction of an unsaturated hydrocarbon compound containing an aromatic group, and a preparation method therefor.

Abstract: The present invention relates to a carbon-based precious metal-transition metal composite catalyst and a preparation method therefor, and more particularly, to a catalyst synthesis method in which, when preparing a high-content precious metal-transition metal composite catalyst, a catalyst having uniform particles and composition can be prepared, and cyclohexane dimethanol (CHDM) is efficiently produced by the hydrogenation reaction of cyclohexane dicarboxylic acid (CHDA) in an aqueous solution.

Abstract: An olefin-based polymer, a film prepared from the olefin-based polymer, and preparation methods for manufacturing the olefin-based polymer and the film are disclosed. The olefin-based polymer has excellent processability, and a film prepared from the olefin-based polymer, particularly, a linear low density polyethylene film has excellent mechanical strength, in particular, drop impact strength.

Abstract: The present invention relates to an ester-based plasticizer composition and use thereof, wherein the composition can provide a synergistic effect in the improvement of thermal stability, such as migration resistance and heating loss, to contribute to the enhancement of properties of a molded product, and can provide a molded product with excellent thermal stability as well as mechanical properties due to excellent compatibility and processability with a polyvinyl chloride.

Abstract: Disclosed is a method for controlling the supply of solid silicon to a preliminary crucible of an ingot growth apparatus for maintaining a constant amount of molten silicon in the preliminary crucible by measuring the height of the molten silicon in the preliminary crucible.

Abstract: An ester-based plasticizer composition and uses of the ester-based plasticizer composition are disclosed. Since the synergistic effect is provided to the improvement of thermal stability such as migration resistance and loss-on-heating to contribute to the improvement of the physical properties of a molded product, and compatibility with polyvinyl chloride resin and processability are excellent, the ester-based plasticizer composition can be used to provide molded products with excellent mechanical properties as well as thermal stability.

Abstract: The present invention relates to a semiconductive resin composition for a high voltage power cable. Specifically, the present invention relates to a semiconductive resin composition comprising a base resin in which ethylene butyl acrylates having different melting indices are mixed, carbon black, an antioxidant, and a crosslinking agent. In addition, the present invention relates to a semiconductive resin composition for a high voltage power cable, the composition having excellent scorch stability and processability and low volume resistance even at a high temperature.

Abstract: The present disclosure relates to a composite resin composition for a geocell or a coral cell. A composite resin composition according to one implementation of the present disclosure has high density and excellent mechanical properties such as tensile strength and elongation, and thus a composite resin molded product obtained therefrom can be effectively used in the manufacturing of a geocell or a coral cell.

Abstract: A hybrid catalyst composition containing a heterogeneous transition metal compound, a catalyst for olefin polymerization containing the heterogeneous transition metal compound, and a method for preparing an olefin-based polymer in which generation of a gel is suppressed using the catalyst are disclosed. The method for preparing an olefin-based polymer can provide an olefin-based polymer in which non-uniformity of the olefin-based polymer, and in particular, generation of a gel is suppressed.

Abstract: The present invention relates to an apparatus for setting a communication ID of an energy storage system, the apparatus comprising: a power converter for selecting one power line from among a plurality of power lines to supply power through the selected power line; and battery managers which are sequentially connected to the power converter and are operated by the power selectively supplied through the one power line selected from among the plurality of power lines, wherein the power converter may communicate with one battery manager which is operated by the supplied power from among the battery managers.

Abstract: The present invention relates to a photovoltaic power generation system comprising: a plurality of PV modules; and a plurality of power generation efficiency optimization units, which are installed to correspond to the respective plurality of PV modules one-to-one, and include inverters to convert power produced from the plurality of PV modules into AC power, and thus supply the same to a power grid through an AC line.

Abstract: An olefin polymer and a preparation method for manufacturing the olefin polymer are disclosed. The olefin polymer has a high melting point and a high crystallization temperature, thus having excellent heat resistance. Therefore, the olefin polymer may be utilized in spout pouches for high-temperature liquid containers, or the like. The olefin polymer may have a density of 0.9 to 0.95 g/cm3, preferably 0.91 to 0.945 g/cm3, and satisfies the following Equations 1a and 2a: 224.02×d?86.257<Tm, and ??[Equation 1a] 219.64×d?95.767<Tc.