CO Chemisorption and H2/D2 Isotope Effect on the CO Hydrogénation Reaction on Ni(111) and Ni/TiO2 (100)

摘要: Resume Un monocristal de TiO 2 (100) recouvert Ni (5 A) est utilise comme modele catalyseur supporte pour etudier les effets la forte interaction metal-support (FIMS) sur chimisorption et l'hydrogenation du CO. La CO 2,5 fois plus faible que Ni(111). L'activite specifique vis-a-vis Ni/TiO 3,0–3,5 elevee Ni(111), alors l'effet isotopique des molecules lourdes formees respectivement inverse normal Une explication qualitative proposee rendre compte FIMS isotopique. Abstract A single crystal surface covered with 5A was used as a model supported catalyst to study effects of strong interaction(SMSI) on chemisorption and the hydrogenation reaction. Auger C Is peak height measurements showed that is suppressed by 2.5 times compared In situ studies o specific methanation activity from ∼3.0–3.5 (111). No H /D isotope effect found for methane production both Ni(111) (100), while higher molecular weight product formation an (100). explanation proposed account SMSI effects.