title: Catalytically Active Bimetallic Nanoparticles Supported on Porous Carbon Capsules Derived From Metal-Organic Framework Composites.
abstract: We report a new methodology for producing monometallic or bimetallic nanoparticles confined within hollow nitrogen-doped porous carbon capsules. The capsules are derived from metal-organic framework (MOF) crystals that are coated with a shell of a secondary material comprising either a metal-tannic acid coordination polymer or a resorcinol-formaldehyde polymer. Platinum nanoparticles are optionally sandwiched between the MOF core and the shell. Pyrolysis of the MOF-shell composites produces hollow capsules of porous nitrogen-doped carbon that bear either monometallic (Pt, Co, and Ni) or alloyed (PtCo and PtNi) metal nanoparticles. The Co and Ni components of the bimetallic nanoparticles are derived from the shell surrounding the MOF crystals. The hollow capsules prevent sintering and detachment of the nanoparticles, and their porous walls allow for efficient mass transport. Alloyed PtCo nanoparticles embedded in the capsule walls are highly active, selective, and recyclable catalysts for the hydrogenation of nitroarenes to anilines.
authors: MacDiarmid Institute for Advanced Materials and Nanotechnology, Institute of Fundamental Sciences, Massey University , Palmerston North 4442, New Zealand.
authors: Hui
authors: H
authors: Yang
authors: MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington , Wellington 6140, New Zealand.
authors: Siobhan J
authors: SJ
authors: Bradley
authors: MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical Sciences, The University of Auckland , Auckland 1142, New Zealand.
authors: Andrew
authors: A
authors: Chan
authors: MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical Sciences, The University of Auckland , Auckland 1142, New Zealand.
authors: Geoffrey I N
authors: GI
authors: Waterhouse
authors: MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington , Wellington 6140, New Zealand.
authors: Thomas
authors: T
authors: Nann
authors: MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Chemistry, University of Canterbury , Christchurch 8140, New Zealand.
authors: Paul E
authors: PE
authors: Kruger
authors: MacDiarmid Institute for Advanced Materials and Nanotechnology, Institute of Fundamental Sciences, Massey University , Palmerston North 4442, New Zealand.
authors: Shane G
authors: SG
authors: Telfer