title: Synthesis and Characterization of Iron-Nitrogen-Doped Graphene/Core-Shell Catalysts: Efficient Oxidative Dehydrogenation of N-Heterocycles.
abstract: An important goal for nanocatalysis is the development of flexible and efficient methods for preparing active and stable core-shell catalysts. In this respect, we present the synthesis and characterization of iron oxides surrounded by nitrogen-doped-graphene shells immobilized on carbon support (labeled FeOx@NGr-C). Active catalytic materials are obtained in a simple, scalable and two-step method via pyrolysis of iron acetate and phenanthroline and subsequent selective leaching. The optimized FeOx@NGr-C catalyst showed high activity in oxidative dehydrogenations of several N-heterocycles. The utility of this benign methodology is demonstrated by the synthesis of pharmaceutically relevant quinolines. In addition, mechanistic studies prove that the reaction progresses via superoxide radical anions (·O2(-)).
authors.affiliation: Leibniz-Institut für Katalyse e.V., an der Universit   Röstock , Albert Einstein Strasse 29a, 18059 Rostock, Germany.
authors.forename: Xinjiang
authors.initials: X
authors.lastname: Cui
authors.affiliation: Leibniz-Institut für Katalyse e.V., an der Universit   Röstock , Albert Einstein Strasse 29a, 18059 Rostock, Germany.
authors.forename: Yuehui
authors.initials: Y
authors.lastname: Li
authors.affiliation: Process Research and Development, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland.
authors.forename: Stephan
authors.initials: S
authors.lastname: Bachmann
authors.affiliation: Process Research and Development, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland.
authors.forename: Michelangelo
authors.initials: M
authors.lastname: Scalone
authors.affiliation: Leibniz-Institut für Katalyse e.V., an der Universit   Röstock , Albert Einstein Strasse 29a, 18059 Rostock, Germany.
authors.forename: Annette-Enrica
authors.initials: AE
authors.lastname: Surkus
authors.affiliation: Leibniz-Institut für Katalyse e.V., an der Universit   Röstock , Albert Einstein Strasse 29a, 18059 Rostock, Germany.
authors.forename: Kathrin
authors.initials: K
authors.lastname: Junge
authors.affiliation: Leibniz-Institut für Katalyse e.V., an der Universit   Röstock , Albert Einstein Strasse 29a, 18059 Rostock, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Topf
authors.affiliation: Leibniz-Institut für Katalyse e.V., an der Universit   Röstock , Albert Einstein Strasse 29a, 18059 Rostock, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Beller