Abstract:
A metal composite catalyst for fuel cell of which activity is improved by the size and the supporting ratio of a supported metal, a preparation method of the metal composite catalyst for fuel cell, and a fuel cell using the metal composite catalyst for fuel cell are provided. In a metal composite catalyst in which a metal catalyst is supported on a carbon support, a metal composite catalyst supported on a mixed carbon support is characterized in that the carbon support is a mixture in which carbon blacks are mixed with graphite nanofibers in a weight ratio range from 100:10 to 100:40. The metal is selected from Pt, Ru, Ni, Co and an alloy formed of combinations thereof. A preparation method of a metal composite catalyst supported on a mixed carbon support comprises the steps of: doping a metal with a mixture in which carbon blacks are mixed with graphite nanofibers in a weight ratio range from 100:10 to 100:40 in the presence of a liquid phase to obtain a solid powder; and filtering and drying the solid powder. The preparation method further comprises the step of treating a support with a basic material between the metal doping step and the filtering and drying step.
Abstract:
A method of preparing a metal composite catalyst with high activity in a simple manner while controlling the size and the supporting amount of the catalyst is provided. A preparation method of a metal composite catalyst comprises the steps of: (1) treating a surface of a carbon support with an aqueous solution containing a basic material or a neutral organic solvent; (2) supporting a metal on the surface treated carbon support in the presence of a liquid medium; and (3) treating a surface of the metal supported carbon support with a basic material. The carbon support is selected from carbon blacks, graphite nanofibers, carbon nanotubes, and a mixed carbon formed of combinations thereof. The metal is selected from Pt, Ru, Ni, Co and an alloy formed of combinations thereof. The basic material used in the step(3) is NaOH, KOH, LiOH, Ca(OH)2 or NaBH4.
Abstract:
본 발명은 전이 금속이 담지된 중형 기공성 실리카 촉매 및 이를 이용한 유독 물질의 제거 방법에 관한 것으로서, 중형 기공성 실리카에 상기 실리카 중량을 기준으로 전이 금속 1 내지 60 중량%가 담지되고, 400 내지 800 ㎡/g의 비표면적 및 0.5 내지 1.0 ㎤/g의 총기공 부피를 갖는 본 발명의 촉매는 부피가 작은 가스 분자 뿐 아니라, 부피가 큰 유기 분자까지 흡착 및 제거가 가능하다.
Abstract:
본 발명은 전이 금속이 담지된 중형 기공성 실리카 촉매 및 이를 이용한 유독 물질의 제거 방법에 관한 것으로서, 중형 기공성 실리카에 상기 실리카 중량을 기준으로 전이 금속 1 내지 60 중량%가 담지되고, 400 내지 800 ㎡/g의 비표면적 및 0.5 내지 1.0 ㎤/g의 총기공 부피를 갖는 본 발명의 촉매는 부피가 작은 가스 분자 뿐 아니라, 부피가 큰 유기 분자까지 흡착 및 제거가 가능하다.