Stable and Versatile Pd Precursors for the Preparation of Robust Pd Catalysts Under Continuous-Flow

Naoya Sakurada, Kwihwan Kobayashi, Yuka Abe, Kosuke Niwa, Takashi Yokoyama, Tsuyoshi Yamada, Takashi Ikawa*, Hironao Sajiki*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

To achieve global sustainability, the chemical and engineering communities require the development of versatile precursors that can be used to synthesize robust catalysts. To meet this demand, we developed a new Pd precursor for highly efficiently incorporating fine Pd-metal into supports. An atmospherically stable Pd precursor (Pd-80) was prepared by thermally promoting the aerobic oxidation of tetrakis(triphenylphosphine)palladium. The physical properties of Pd-80 were investigated by NMR spectroscopy, SEM, XPS, solvent-relaxation NMR spectroscopy, and dynamic light scattering (DLS) experiments. We also prepared a cordierite-supported Pd catalyst (Pd/cordierite) by stirring Pd-80 and cordierite powder in chloroform at room temperature. Pd/cordierite selectively catalyzed the hydrogenation of various reducible functional groups, including alkynes, azides, nitro groups, olefins, CO2Bn, N-Cbz, O-Bn, aromatic ketones, and styrene oxide, in continuous-flow hydrogenation reactions. The Pd/cordierite-catalyzed continuous-flow hydrogenation of nitrobenzene derivatives afforded the corresponding anilines, with catalytic activities maintained for over 250 h of continuous operation with a turnover number (TON) of 61,090.

Original languageEnglish
Article numbere202401859
JournalChemSusChem
Volume18
Issue number4
DOIs
StatePublished - 2025/02/16

Keywords

  • Chemoselectivity
  • Continuous-flow reaction
  • Hydrogenation
  • Supported palladium catalyst
  • Wet impregnation

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemical Engineering
  • General Materials Science
  • General Energy

Fingerprint

Dive into the research topics of 'Stable and Versatile Pd Precursors for the Preparation of Robust Pd Catalysts Under Continuous-Flow'. Together they form a unique fingerprint.

Cite this