title: Encapsulation of Bimetallic Metal Nanoparticles into Robust Zirconium-Based Metal-Organic Frameworks: Evaluation of the Catalytic Potential for Size-Selective Hydrogenation.
abstract: The realization of metal nanoparticles (NPs) with bimetallic character and distinct composition for specific catalytic applications is an intensively studied field. Due to the synergy between metals, most bimetallic particles exhibit unique properties that are hardly provided by the individual monometallic counterparts. However, as small-sized NPs possess high surface energy, agglomeration during catalytic reactions is favored. Sufficient stabilization can be achieved by confinement of NPs in porous support materials. In this sense, metal-organic frameworks (MOFs) in particular have gained a lot of attention during the last years; however, encapsulation of bimetallic species remains challenging. Herein, the exclusive embedding of preformed core-shell PdPt and RuPt NPs into chemically robust Zr-based MOFs is presented. Microstructural characterization manifests partial retention of the core-shell systems after successful encapsulation without harming the crystallinity of the microporous support. The resulting chemically robust NP@UiO-66 materials exhibit enhanced catalytic activity towards the liquid-phase hydrogenation of nitrobenzene, competitive with commercially used Pt on activated carbon, but with superior size-selectivity for sterically varied substrates.
authors.affiliation: Chair of Inorganic Chemistry II, Ruhr-University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Rösler
authors.affiliation: Chair of Inorganic and Metal-organic Chemistry, Technical University Munich, Lichtenbergstraße 4, 85748, Garching, Germany.
authors.forename: Stefano
authors.initials: S
authors.lastname: Dissegna
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Avda. de los Naranjo, s/n, 46022, Valencia, Spain.
authors.forename: Victor L
authors.initials: VL
authors.lastname: Rechac
authors.affiliation: Chair of Inorganic Chemistry II, Ruhr-University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
authors.forename: Max
authors.initials: M
authors.lastname: Kauer
authors.affiliation: Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
authors.forename: Penghu
authors.initials: P
authors.lastname: Guo
authors.affiliation: EMAT, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.
authors.forename: Stuart
authors.initials: S
authors.lastname: Turner
authors.affiliation: Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
authors.forename: Kevin
authors.initials: K
authors.lastname: Ollegott
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan.
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Kobayashi
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University and the Ultramicroscopy Research Center, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Yamamoto
authors.affiliation: Chair of Inorganic Chemistry II, Ruhr-University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Peeters
authors.affiliation: Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Campus Nord, B330, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Yuemin
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University and the Ultramicroscopy Research Center, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.
authors.forename: Syo
authors.initials: S
authors.lastname: Matsumura
authors.affiliation: EMAT, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.
authors.forename: Gustaaf
authors.initials: G
authors.lastname: Van Tendeloo
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitagawa
authors.affiliation: Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Muhler
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Avda. de los Naranjo, s/n, 46022, Valencia, Spain.
authors.forename: Francesc X
authors.initials: FX
authors.lastname: Llabrés I Xamena
authors.affiliation: Chair of Inorganic and Metal-organic Chemistry, Technical University Munich, Lichtenbergstraße 4, 85748, Garching, Germany.
authors.forename: Roland A
authors.identifier: http://orcid.org/0000-0002-7532-5286
authors.initials: RA
authors.lastname: Fischer
keywords: heterogeneous catalysis; hydrogenation; metal-organic frameworks; nanoparticles; nanostructures