Hydrogenation of nitrobenzene over Pd/C catalysts prepared from molecular carbonyl-phosphine palladium clusters

Christopher Willocq, Vincent Dubois, Yaroslav Z. Khimyak, Michel Devillers, Sophie Hermans

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Molecular phosphine-carbonyl palladium clusters were anchored onto a phosphine-functionalized carbon support (C PPh2) by ligand exchange. This support was characterized by solid-state NMR prior to reaction with the clusters. The same clusters were also deposited on the non-functionalized support (C SX+). Characterization by SEM and XPS showed that the surface was more uniform when using the functionalized support. After thermal activation, the Pd/C materials obtained were characterized by CO chemisorption, XPS, SEM, TEM, powder XRD and analyzed for metal loading by ICP-OES. Again, the solids prepared with the functionalized support presented a more uniform surface. TEM indicated that small nanoparticles (1-10 nm) were present on the surface with narrow size distributions. The activated Pd/C materials proved to be efficient catalysts for the hydrogenation of nitrobenzene into aniline. They were competitive with commercial and literature catalysts. Moreover, the catalysts prepared using the functionalized support were more active and more stable than when using C SX+.

Original languageEnglish
Pages (from-to)172-180
Number of pages9
JournalJournal of Molecular Catalysis A: Chemical
Volume365
Early online date6 Sep 2012
DOIs
Publication statusPublished - Dec 2012
Externally publishedYes

Keywords

  • Carbon
  • Clusters
  • Functionalization
  • Nitrobenzene
  • Phosphines

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