Abstract:
The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions.
Abstract:
A metal-carbon composite supported catalyst for hydrogen production using co-evaporation and a method of preparing the same, wherein the catalyst is configured such that a metal-carbon composite having a core-shell structure resulting from co-evaporation is supported on the surface of an oxide-based support coated with carbon, thereby maintaining superior durability without agglomeration even in a catalytic reaction at a high temperature. Because part or all of the surface of metal is covered with the carbon shell, even when the catalyst is applied under severe reaction conditions including high temperatures, long periods of time, acidic or alkaline states, etc., the metal particles do not agglomerate or are not detached, and do not corrode, thus exhibiting high performance and high durability. Therefore, inactivation of the catalyst or the generation of side reactions can be prevented, so that the catalyst can be efficiently utilized in hydrogen production.
Abstract:
Provided are a carbon electrode particularly suitable to be used as a negative electrode of an energy storing apparatus and the like and a method for manufacturing the same by forming the carbon electrode by heat-treating a natural carbon material such as a natural fiber sheet including a natural fiber or cellulose sheet including a natural cellulose fiber which is a natural material other than a petroleum-based material or a petroleum-based synthetic material to reduce manufacturing cost, shorten a manufacturing process, minimize discharge of a hazardous substance, and uniformly maintain storage capacitance even in repeated charging and discharging when being applied to the energy storing apparatus. The carbon electrode includes any one of an alkaline metal particle and an alkaline earth metal particle having an average particle size of less than 100 nm which is formed on a surface in a process of carbonizing a natural carbon material.
Abstract:
A metal-carbon composite supported catalyst for hydrogen production using co-evaporation and a method of preparing the same, wherein the catalyst is configured such that a metal-carbon composite having a core-shell structure resulting from co-evaporation is supported on the surface of an oxide-based support coated with carbon, thereby maintaining superior durability without agglomeration even in a catalytic reaction at a high temperature. Because part or all of the surface of metal is covered with the carbon shell, even when the catalyst is applied under severe reaction conditions including high temperatures, long periods of time, acidic or alkaline states, etc., the metal particles do not agglomerate or are not detached, and do not corrode, thus exhibiting high performance and high durability. Therefore, inactivation of the catalyst or the generation of side reactions can be prevented, so that the catalyst can be efficiently utilized in hydrogen production.
Abstract:
Provided are a carbon electrode particularly suitable to be used as a negative electrode of an energy storing apparatus and the like and a method for manufacturing the same by forming the carbon electrode by heat-treating a natural carbon material such as a natural fiber sheet including a natural fiber or cellulose sheet including a natural cellulose fiber which is a natural material other than a petroleum-based material or a petroleum-based synthetic material to reduce manufacturing cost, shorten a manufacturing process, minimize discharge of a hazardous substance, and uniformly maintain storage capacitance even in repeated charging and discharging when being applied to the energy storing apparatus. The carbon electrode includes any one of an alkali metal particle and an alkali earth metal particle having an average particle size of less than 100 nm which is formed on a surface in a process of carbonizing a natural carbon material.