In recent years, mixed-metal oxides which contain ceria are receiving a lot of attention due to their applications in catalysis, materials science, photochemistry and the control of environmental pollution. CeOx-TiO2 has shown to be an excellent substrate for the dispersion of metals used in the oxidation of CO, the water-gas shift reaction and the hydrogenation of CO2 to alcohols. When considering the CeOx/TiO2 (110) system, the two oxide components are prototypical lanthanide (CeO2) and transition metal (TiO2) compounds and have been extensively studied on their own. Catalytically, both offer excellent redox chemical properties including reducibility, stable oxidation states (Ce4+/Ce3+; Ti4+/Ti3+), and oxygen storage capacity. &lt;!--[endif]----&gt; However, both structurally (CeO2 – fluorite versus TiO2 – anatase lattice) and electronically (Ce-4f versus Ti-3d valence levels), there are substantial differences between these two materials. Recent studies with powder catalysts show intermixing at the ceria-titania interface with a gain in the stability of Ce3+ over Ce4+. Ce3+ sites are also observed after depositing ceria nanostructures on a TiO2(110) substrate. This talk will discuss the characterization of these sites and will show also new results for RuOx/TiO2(110) systems which combine oxides with different electronic properties and also display very good performance as catalysts for C1 chemistry. &lt;!--![endif]----&gt;

CeOx/TiO2(110) and RuOx/TiO2(110) as active systems for CO oxidation, the water-gas shift and CO2 hydrogenation reactions

254th National Meeting (2017)

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