title: Surface catalysed Suzuki-Miyaura cross-coupling by Pd nanoparticles: an operando XAS study.
abstract: Size-controlled, catalytically active PVP-stabilised Pd nanoparticles have been studied by operando liquid phase XAS during the Suzuki cross-coupling of iodonanisole and phenylboronic acid in MeOH-toluene using KOMe base. XAS reveals nanoparticles are stable to metal leaching throughout the reaction, with surface density Pd defect sites directly implicated in the catalytic cycle. The efficacy of popular selective chemical and structural poisons for distinguishing heterogeneous and homogeneous contributions in Pd catalysed cross-couplings is also explored.
authors.affiliation: Cardiff Catalysis Institute, School of Chemistry, Cardiff University, UK. leeaf@cardiff.ac.uk
authors.forename: Adam F
authors.initials: AF
authors.lastname: Lee
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Ellis
authors.forename: Ian J S
authors.initials: IJ
authors.lastname: Fairlamb
authors.forename: Karen
authors.initials: K
authors.lastname: Wilson
mesh_terms: D000840:Anisoles / Q000737:chemistry; D001897:Boronic Acids / Q000737:chemistry; D002384:Catalysis; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D010165:Palladium / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties; D056928:X-Ray Absorption Spectroscopy; D014961:X-Ray Diffraction
chemical_list: D000840:Anisoles; D001897:Boronic Acids; D010165:Palladium; D012822:Silicon Dioxide; C060998:anisole; C010686:benzeneboronic acid