The present work describes the role of oxide supports such as alumina (Al₂O₃), silica (SiO₂), andtitania (TiO₂) on the structural and catalytic properties of europiumion-doped ceriumoxide. In particular, themainmotive of this study was to further improve the catalytic efficiency of Ce_0.8Eu_0.2O_2-d solid solutions for oxidationreactions.Diesel soot oxidation and oxidative coupling of benzylamine were examined asmodel reactions to assessthe catalytic properties of the prepared materials. These were prepared by deposition coprecipitation method andcharacterized by various techniques namely, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy,transmission electron microscopy, and BET/BJH surface area and pore-size distribution methods. Thecharacterization studies reveal that Ce_0.8Eu_0.2O_2-d is well-dispersed without the formation of CeO₂ or Eu₂O₃ crystalline compounds over the surface of various supports. The TEMstudies confirm the nano-crystalline natureof the Ce_0.8Eu_0.2O_2-d and Raman studies indicate the formation of oxygen vacancies which are significant foroxidation reactions.As expected, the supported Ce_0.8Eu_0.2O_2-d mixed oxides exhibited better catalytic activity thanpure ceria and unsupported oxides towards the soot and benzylamine oxidation reactions.

Supported Ce_0.8Eu_0.2O_2-d(CE) catalysts are exhibiting better performance than unsupported CE and pure ceria for soot and benzylamine oxidation owing to metal oxide-support and metal oxide-metal oxide interactions.