Tuning the metal-support interaction in the thermal-resistant Au-CeO₂ catalysts for CO oxidation: influence of a mild N₂ pretreatment.

ABSTRACT: Pretreatment is very important for altering the catalytic properties of the supported noble metal catalysts in many heterogeneous reactions. In this study, a simple and mild pretreatment with N₂ has been reported to re-activate the Au-CeO₂ catalysts that were prepared by a deposition-precipitation method followed by calcination at 600 °C. Upon N₂ pretreatment at 200 °C, the metal-support interaction between Au nanoparticles (NPs) and CeO₂ was observed with the evidence of particular coverage of Au nanoparticles by CeO₂, electronic interactions and changes in CO adsorption ability. As a result, the CO oxidation activity of the pretreated Au-CeO₂ catalysts largely improved compared with those without any pretreatment and even

SUBMITTER: Sun Y 

PROVIDER: S-EPMC9090844 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature