Co-based heterogeneous catalysts from well-defined Α-diimine complexes: Discussing the role of nitrogen

Dario Formenti, Francesco Ferretti, Christoph Topf, Annette Enrica Surkus, Marga Martina Pohl, Jörg Radnik, Matthias Schneider, Kathrin Junge, Matthias Beller, Fabio Ragaini

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63 Scopus citations

Abstract

Ar-BIANs and related α-diimine Co complexes were wet impregnated onto Vulcan® XC 72 R carbon black powder and used as precursors for the synthesis of heterogeneous supported nanoscale catalysts by pyrolysis under argon at 800 °C. The catalytic materials feature a core-shell structure composed of metallic Co and Co oxides decorated with nitrogen-doped graphitic layers (NGr). These catalysts display high activity in the liquid phase hydrogenation of aromatic nitro compounds (110 °C, 50 bar H2) to give chemoselectively substituted aryl amines. The catalytic activity is closely related to the amount and type of nitrogen atoms in the final catalytic material, which suggests a heterolytic activation of dihydrogen.

Original languageEnglish
Pages (from-to)79-89
Number of pages11
JournalJournal of Catalysis
Volume351
DOIs
StatePublished - 2017
Externally publishedYes

Keywords

  • Cobalt
  • Heterolytic activation
  • Hydrogenation
  • Kinetic
  • Nitro compounds

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