|
|||||
|
|
The effect of loading on sintering and catalytic activity of Pt/SiO2 hybrid catalyst powders synthesized via spray pyrolysis |
|
| Authors: | Jaecheol Yun Chan-Ho Jung Dahee Park Hye Young Koo Jung-Yeul Yun Yangdo Kim Jeong Young Park |
| Affiliation: | 1. Powder Technology Department, Korea Institute of Materials Science (KIMS), Changwon, 642-831, Korea 2. Department of Material Science and Engineering, Pusan National University, Busan, 607-735, Korea 3. Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon, 305-701, Korea 4. Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Korea |
| Abstract: | 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: | |
| 本文献已被 SpringerLink 等数据库收录！ | |