Abstract:
PURPOSE: A shape-controlled Pt/C catalyst is provided to have high catalytic activity in various fuels and to have high oxidation density, thereby improving efficiency of fuel cells. CONSTITUTION: A manufacturing method of a shape-controlled Pt/C catalyst comprises a step of manufacturing a solution by dissolving a surfactant and reducing agent into an organic solvent; a step of heating the solution; a step of injecting a platinum precursor into the solution and obtaining cubic Pt nanoparticles; a step of quenching the solution to room temperature; and a step of absorbing the cubic Pt nanoparticles onto a carbon-based catalyst support to obtain a Pt/C catalyst. The shape-controlled Pt/C catalyst comprises the carbon-based catalyst support; and the cubic Pt nanoparticles absorbed onto the surface of the carbon-based catalyst support.
Abstract:
본 발명은 메조포러스 전이금속 질화물이 전이금속 산화물을 질화하여 제조되는 것을 특징으로 하는 메조포러스 전이금속 질화물의 제조 방법에 관한 것이다. 본 발명의 제조 방법은 실리카 템플릿 또는 계면활성제를 사용할 필요 없이 균일한 크기의 가진 기공 및 비표면적인 넓은 메조포러스 전이금속 질화물을 제공할 수 있고, 반응 온도 및 시간에 보다 안정적인 메조포러스 구조체를 이루고 있기에 반응 온도 및 시간에 따라 질화물의 기공 크기를 조절할 수 있다.
Abstract:
PURPOSE: A selective gas permeability transition metal structure and manufacturing method thereof are provided to simplify a manufacturing process by manufacturing a mesoporous transition metal nitride through a nitrification process of a transition metal nitride. CONSTITUTION: A selective gas permeability transition metal structure forms a blow hole when contacting with nitrogenous compound gas and the blow hole is disappeared when contacting with oxygen compound gas. The nitrogenous compound gas is one or more nitrogenous compound gases selected from a group composed of amine compound gas including ammonia gas, hydrogen cyanide gas, hydrazine gas, and first and second and third amines. A size of the blow hole is 1 to 100mm.
Abstract:
본발명은탄소나노섬유복합체제조방법에관한것으로서, 상기복합체를리튬이차전지의음극활물질로이용할경우합금화/탈합금화반응이진행되더라도, 활물질의표면이크게바뀌지않아매우안정적이고리튬이차전지의전극성능을개선할수 있으며, 특히 2000회사용후 순환당 용량손실은 0.021%로서우수한순환안정성을나타낼수 있다.
Abstract:
본발명은탄소나노섬유복합체제조방법에관한것으로서, 상기복합체를리튬이차전지의음극활물질로이용할경우합금화/탈합금화반응이진행되더라도, 활물질의표면이크게바뀌지않아매우안정적이고리튬이차전지의전극성능을개선할수 있으며, 특히 2000회사용후 순환당 용량손실은 0.021%로서우수한순환안정성을나타낼수 있다.