Abstract: The present invention relates to an etching composition and a method of producing a MXene. The etching composition of the present invention can stably and quickly produce a MXene at high temperature. The etching composition of the present invention can produce a MXene in high yield. The etching composition of the present invention can easily produce various types of MXenes. A method using the etching composition of the present invention can produce a MXene having excellent electrochemical and mechanical properties.

Abstract: The present invention relates to a guider for separating a tube, and more particularly, to a guider for easily separating a tube and a catheter which are coupled to each other. The guider for separating a tube according to an exemplary embodiment of the present invention may include: a cylindrical body portion which includes a through space which is opened at both ends thereof and formed to enable a tube to penetrate therethrough; and a wing portion which is connected to an outer surface of the body portion and transmits rotational force to the body portion.

Abstract: An insulating heat-radiating coating composition including a coating layer-forming component including a main resin; and an insulating heat-radiating filler, which not only is capable of exhibiting excellent heat-radiating performance due to excellent thermal conductivity and heat radiation but also forms an insulating heat-radiating coating layer having a heat-insulating property. In addition, an insulating heat-radiating coating layer formed using the insulating heat-radiating coating composition has excellent adhesiveness to a surface to be coated, thereby remarkably preventing the peeling of an insulating heat-radiating coating layer during use and maintaining the durability of the insulating heat-radiating coating layer against physical and chemical stimuli such as external heat, organic solvents, moisture, and impact after formation of the insulating heat-radiating coating layer.

Abstract: Disclosed are a platinum (Pt)-free, palladium (Pd)-yttrium (Y) alloy catalyst having superior oxygen reduction reaction activity and stability, a method for preparing the same, and a fuel cell including the catalyst. Since the Pt-free Pd—Y catalyst is inexpensive, it may be usefully applicable for fuel cells, particularly polymer electrolyte membrane fuel cells.

Abstract: Disclosed is a method for producing a core-shell structured electrocatalyst for a fuel cell. The method includes uniformly supporting nano-sized core particles on a support to obtain a core support, and selectively forming a shell layer only on the surface of the core particles of the core support. According to the method, the core and the shell layer can be formed without the need for a post-treatment process, such as chemical treatment and heat treatment. Further disclosed is a core-shell structured electrocatalyst for a fuel cell produced by the method. The core-shell structured electrocatalyst has a large amount of supported catalyst and exhibits superior catalytic activity and excellent electrochemical properties. Further disclosed is a fuel cell including the core-shell structured electrocatalyst.

Abstract: Provided are a method of preparing an electrocatalyst for fuel cells in a core-shell structure, an electrocatalyst for fuel cells having a core-shell structure, and a fuel cell including the electrocatalyst for fuel cells. The method may be useful in forming a core and a shell layer without performing a subsequent process such as chemical treatment or heat treatment and forming a core support in which core particles having a nanosize diameter are homogeneously supported, followed by selectively forming shell layers on surfaces of the core particles in the support. Also, the electrocatalyst for fuel cells has a high catalyst-supporting amount and excellent catalyst activity and electrochemical property.

Abstract: Disclosed is a method for producing a core-shell structured electrocatalyst for a fuel cell. The method includes uniformly supporting nano-sized core particles on a support to obtain a core support, and selectively forming a shell layer only on the surface of the core particles of the core support. According to the method, the core and the shell layer can be formed without the need for a post-treatment process, such as chemical treatment and heat treatment. Further disclosed is a core-shell structured electrocatalyst for a fuel cell produced by the method. The core-shell structured electrocatalyst has a large amount of supported catalyst and exhibits superior catalytic activity and excellent electrochemical properties. Further disclosed is a fuel cell including the core-shell structured electrocatalyst.

Abstract: Provided are a method of preparing an electrocatalyst for fuel cells in a core-shell structure, an electrocatalyst for fuel cells having a core-shell structure, and a fuel cell including the electrocatalyst for fuel cells. The method may be useful in forming a core and a shell layer without performing a subsequent process such as chemical treatment or heat treatment and forming a core support in which core particles having a nanosize diameter are homogeneously supported, followed by selectively forming shell layers on surfaces of the core particles in the support. Also, the electrocatalyst for fuel cells has a high catalyst-supporting amount and excellent catalyst activity and electrochemical property.

Abstract: Disclosed are a platinum (Pt)-free, palladium (Pd)-yttrium (Y) alloy catalyst having superior oxygen reduction reaction activity and stability, a method for preparing the same, and a fuel cell including the catalyst. Since the Pt-free Pd-Y catalyst is inexpensive, it may be usefully applicable for fuel cells, particularly polymer electrolyte membrane fuel cells.