A Convenient and Stable Heterogeneous Nickel Catalyst for Hydrodehalogenation of Aryl Halides Using Molecular Hydrogen

David K. Leonard, Pavel Ryabchuk, Muhammad Anwar, Sarim Dastgir, Kathrin Junge, Matthias Beller

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Hydrodehalogenation is an effective strategy for transforming persistent and potentially toxic organohalides into their more benign congeners. Common methods utilize Pd/C or Raney-nickel as catalysts, which are either expensive or have safety concerns. In this study, a nickel-based catalyst supported on titania (Ni-phen@TiO2-800) is used as a safe alternative to pyrophoric Raney-nickel. The catalyst is prepared in a straightforward fashion by deposition of nickel(II)/1,10-phenanthroline on titania, followed by pyrolysis. The catalytic material, which was characterized by SEM, TEM, XRD, and XPS, consists of nickel nanoparticles covered with N-doped carbon layers. By using design of experiments (DoE), this nanostructured catalyst is found to be proficient for the facile and selective hydrodehalogenation of a diverse range of substrates bearing C−I, C−Br, or C−Cl bonds (>30 examples). The practicality of this catalyst system is demonstrated by the dehalogenation of environmentally hazardous and polyhalogenated substrates atrazine, tetrabromobisphenol A, tetrachlorobenzene, and a polybrominated diphenyl ether (PBDE).

Original languageEnglish
Article numbere202102315
JournalChemSusChem
Volume15
Issue number5
DOIs
StatePublished - 8 Mar 2022
Externally publishedYes

Keywords

  • heterogeneous catalysis
  • hydrodehalogenation
  • nickel
  • reduction
  • supported catalysts

Fingerprint

Dive into the research topics of 'A Convenient and Stable Heterogeneous Nickel Catalyst for Hydrodehalogenation of Aryl Halides Using Molecular Hydrogen'. Together they form a unique fingerprint.

Cite this