1. The Mechanism of Hydrocarbon Oxygenate Reforming: CC Bond Scission, Carbon Formation, and Noble-Metal-Free Oxide Catalysts
- Author
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Viktor Johánek, Klára Ševčíková, Nataliya Tsud, Yaroslava Lykhach, Jörg Libuda, Armin Neitzel, Vladimír Matolín, Kevin C. Prince, and Tomáš Skála
- Subjects
inorganic chemicals ,Ethylene Glycol ,General Chemical Engineering ,Oxide ,chemistry.chemical_element ,engineering.material ,Photochemistry ,Catalysis ,chemistry.chemical_compound ,Catalytic reforming ,Environmental Chemistry ,General Materials Science ,Oxygenate ,Bond cleavage ,Acetic Acid ,Platinum ,Ethanol ,Cerium ,Carbon ,General Energy ,chemistry ,engineering ,Noble metal ,Ethylene glycol - Abstract
Towards a molecular understanding of the mechanism behind catalytic reforming of bioderived hydrocarbon oxygenates, we explore the C-C bond scission of C2 model compounds (acetic acid, ethanol, ethylene glycol) on ceria model catalysts of different complexity, with and without platinum. Synchrotron photoelectron spectroscopy reveals that the reaction pathway depends very specifically on both the reactant molecule and the catalyst surface. Whereas C-C bond scission on Pt sites and on oxygen vacancies involves intermittent surface carbon species, the reaction occurs without any carbon formation and deposition for ethylene glycol on CeO2(111).
- Published
- 2013