Ammoxidation of toluene over Y-Ba-Cu-Co-O perovskites |
| |
| Authors: | Staffan Hansen Jonathan C. Otamiri Arne Andersson |
| |
| Affiliation: | (1) Department of Inorganic Chemistry 2, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden;(2) Department of Chemical Technology, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden |
| |
| Abstract: | Ammoxidation of toluene over the perovskites YBa2Cu3O6.1, YBa2Cu2CoO6.7 and YBaCuCoO4.9 was investigated at 400 °C. At low partial pressures of O2 benzonitrile was selectively formed, while CO2 was the main product at high pressures of O2. Systematic differences in activity were observed for the three phases and are related to the crystal contents of Cu and Co. At low O2 pressures, Cu-sites are active for nitrile formation, while Co-sites give CO2. At high O2 pressures, the activity for CO2 of Cu-sites increases more than that of Co-sites due to filling of near-surface oxygen vacancies. |
| |
| Keywords: | Ammoxidation toluene benzonitrile YBa2Cu3O6+x YBa2Cu2CoO6+x YBaCuCoO5 perovskites oxide catalysts superconductors |
| 本文献已被 SpringerLink 等数据库收录！ |
|
