Inthispresentation,Mr.Novotný will present an overview of his work on MoO3catalystssupported on γ-Al2O3, and α-Fe2O3 as well as their model counterparts based on thinfilmsofMoOxgrown on sapphire (0001)surface and reconstructed sapphire. As an alternativeto conventionalsteamcracking,Mr.Novotný investigateschemical-looping (CL) oxidative dehydrogenation (ODH) of ethane.CL-ODHprocessemploysredoxcatalysts as thesoleoxidantwhichoffers large reductions in energyconsumption and greenhouse gas emissions whencomparedtosteamcracking.Presentedresults describe the relationships betweencatalyticactivity,selectivity, phase composition,oxidationstate, and morphology of preparedMoO3catalysts. For instance, it is shownthat high selectivitytowardethylenecorrespondsto a reduction of Mo+VI to Mo+V. The presenceoflowerMo oxidation statestriggerstheproduction of CH4 fromethaneresulting in substantialselectivity loss. A preparation of MoO3thinfilmswith unique nanostructuredand/ormonocrystalline morphology is alsopresented. The ongoinginvestigationofthese model catalysts will provide a furtherunderstandingofMoO3properties as an active phase in ethaneODH and otherredox processes.