Abstract
The nature of the surfaces of bulk and supported transition metal oxides, important as catalysts for the selective oxidation of hydrocarbons, is explored. It is emphasized that the oxide surface is in dynamic interaction with the gas phase and adapts itself to reaction conditions. The importance of the transfer of electrons between the oxide and the hydrocarbon/oxygen gas mixture as a redox system, and the influence of surface defects, is illustrated. Reactions of oxidation of hydrocarbons may start from the activation of either the hydrocarbon molecule or oxygen. The catalytic behaviour of the oxide is determined by the relative importance of nucleophilic and electrophilic oxidation pathways. Monolayer transition metal oxides supported on a second oxide phase exhibit properties which are different from the bulk material. These materials may be systematically modified to investigate the factors which are important in selective oxidation reactions and to tailor catalysts to the requirements of the reactions
“That is the essence of science: ask an impertinent question, and you are on the way to pertinent answer”.
J.Bronowski, The Ascent of Man
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Haber, J. (2002). Molecular Description of Transition Metal Oxide Catalysts. In: Carley, A.F., Davies, P.R., Hutchings, G.J., Spencer, M.S. (eds) Surface Chemistry and Catalysis. Fundamental and Applied Catalysis. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-6637-0_11
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DOI: https://doi.org/10.1007/978-1-4757-6637-0_11
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