Mixed metal oxides are important industrial catalysts for the selective oxidation and ammoxidation of aromatics
and alkenes and often contain Sb oxides as a component. For the preparation of a catalytically relevant system
on the basis of monolayer-type catalysts, an alternative route as compared to the conventional impregnation
was chosen by milling the dry compounds in a planetary mill. To get a closer insight into the spreading and
oxidation properties of antimony oxide on titania, only the binary oxidic compounds Sb oxide and TiO2 as
support were investigated in the present study. Photoelectron spectroscopy (XPS) investigations for surface
analysis and X-ray absorption spectroscopy (XANES) for bulk phase analysis were applied. The various Sb
oxides (Sb2O3, Sb2O4, and Sb2O5) show totally different spreading behavior. Only with the Sb(III) oxide on
titania a significant increase of dispersion was detectable by means of XPS and temperature programmed
reduction (TPR). The temperature of oxidation of the supported Sb(III) oxide in air was 100 °C lower as
compared to the bulk phase oxidation. The final formula after oxidation of Sb(III) oxide can be calculated
from XANES results as Sb6O13 and does not end up at a stoichiometry of Sb2O4.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.