title: Carbon nanofibers modified with heteroatoms as metal-free catalysts for the oxidative dehydrogenation of propane.
abstract: Carbon nanofibres (CNFs) were modified with B and P by an ex situ approach. In addition, CNFs doped with N were prepared in situ using ethylenediamine as the N and C source. After calcination, the doped CNFs were used as catalysts for the oxidative dehydrogenation of propane. For B-CNFs, the effects of boron loading and calcination temperature on B speciation and catalytic conversion were studied. For the same reaction temperatures and conversions, B- and P-doped CNFs exhibited higher selectivities to propene than pristine CNFs. The N-CNFs were the most active but the least selective of the catalysts tested here. Our results also show that the type of P precursor affects the selectivity to propene and that CNFs modified using triphenylphosphine as the precursor provided the highest selectivity at isoconversion.
authors.affiliation: Instituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, E-50018 Zaragoza (Spain), Fax: (+34) 976733318.
authors.forename: Yanila
authors.initials: Y
authors.lastname: Marco
authors.forename: Laura
authors.initials: L
authors.lastname: Roldán
authors.forename: Edgar
authors.initials: E
authors.lastname: Muñoz
authors.forename: Enrique
authors.initials: E
authors.lastname: García-Bordejé
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D057139:Nanofibers / Q000737:chemistry*; D010084:Oxidation-Reduction; D011407:Propane / Q000737:chemistry*; D013696:Temperature
chemical_list: D002244:Carbon; D011407:Propane
keywords: carbon; dehydrogenation; doping; nanostructures; supported catalysts