화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.11, 1980-1984, November, 2014
DOI10.1007/s11814-014-0144-x  Export Citation
The effect of loading on sintering and catalytic activity of Pt/SiO2 hybrid catalyst powders synthesized via spray pyrolysis
Jaecheol Yun1, 2, Chan-Ho Jung3, 4, Dahee Park1, Hye Young Koo1, Jung-Yeul Yun1, Yangdo Kim2, †, and Jeong Young Park3, 4, †
  • 1Powder Technology Department, Korea Institute of Materials Science (KIMS), Changwon 642-831, Korea
  • 2Department of Material Science and Engineering, Pusan National University, Busan 607-735, Korea
  • 3Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea
  • 4Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea
E-mail:,
Platinum (Pt) is commonly used as a heterogeneous catalyst to effectively convert carbon monoxide (CO) from automobile exhaust gas into carbon dioxide (CO2). Platinum/silica (Pt/SiO2) hybrid catalyst powders with varying Pt content were synthesized via a spray pyrolysis process. The average particle size and specific surface area of the Pt nanoparticles on the Pt/SiO2 hybrid catalyst powders were characterized as-prepared and after heat treatment. As the Pt loading increased, the Pt nanoparticles grew on the surface of the SiO2 as a result of sintering, and the catalytic efficiency decreased. This work demonstrates that the Pt/SiO2 (4 wt% Pt) hybrid catalyst powder is suitable as a hightemperature automobile exhaust catalyst, compared with the Pt/SiO2 hybrid catalyst powder with high Pt loading (14 wt% Pt), indicating that metal nanoparticle loading is a key factor for determining catalytic activity.
Keywords:Spray Pyrolysis Process;Hybrid Catalyst Powder;Pt Nanoparticles;CO Oxidation
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