title: Novel micro-reactor flow cell for investigation of model catalysts using in situ grazing-incidence X-ray scattering.
abstract: The design, fabrication and performance of a novel and highly sensitive micro-reactor device for performing in situ grazing-incidence X-ray scattering experiments of model catalyst systems is presented. The design of the reaction chamber, etched in silicon on insulator (SIO), permits grazing-incidence small-angle X-ray scattering (GISAXS) in transmission through 10 µm-thick entrance and exit windows by using micro-focused beams. An additional thinning of the Pyrex glass reactor lid allows simultaneous acquisition of the grazing-incidence wide-angle X-ray scattering (GIWAXS). In situ experiments at synchrotron facilities are performed utilizing the micro-reactor and a designed transportable gas feed and analysis system. The feasibility of simultaneous in situ GISAXS/GIWAXS experiments in the novel micro-reactor flow cell was confirmed with CO oxidation over mass-selected Ru nanoparticles.
authors.affiliation: Center for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark (DTU), Fysikvej, 2800 Kgs Lyngby, Denmark.
authors.forename: Jan
authors.initials: J
authors.lastname: Kehres
authors.affiliation: Department of Micro and Nanotechnology, Technical University of Denmark (DTU), Ørsteds Plads, 2800 Kgs Lyngby, Denmark.
authors.forename: Thomas
authors.initials: T
authors.lastname: Pedersen
authors.affiliation: Center for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark (DTU), Fysikvej, 2800 Kgs Lyngby, Denmark.
authors.forename: Federico
authors.initials: F
authors.lastname: Masini
authors.affiliation: Department of Energy Conversion and Storage, Technical University of Denmark (DTU), Frederiksborgvej 399, PO Box 49, 4000 Roskilde, Denmark.
authors.forename: Jens Wenzel
authors.initials: JW
authors.lastname: Andreasen
authors.affiliation: Department of Physics, Technical University of Denmark (DTU), Fysikvej, 2800 Kgs Lyngby, Denmark.
authors.forename: Martin Meedom
authors.initials: MM
authors.lastname: Nielsen
authors.affiliation: Paul Scherrer Institute, 5232 Villingen PSI, Switzerland.
authors.forename: Ana
authors.initials: A
authors.lastname: Diaz
authors.affiliation: Center for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark (DTU), Fysikvej, 2800 Kgs Lyngby, Denmark.
authors.forename: Jane Hvolbæk
authors.initials: JH
authors.lastname: Nielsen
authors.affiliation: Department of Micro and Nanotechnology, Technical University of Denmark (DTU), Ørsteds Plads, 2800 Kgs Lyngby, Denmark.
authors.forename: Ole
authors.initials: O
authors.lastname: Hansen
authors.affiliation: Center for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark (DTU), Fysikvej, 2800 Kgs Lyngby, Denmark.
authors.forename: Ib
authors.initials: I
authors.lastname: Chorkendorff
keywords: GISAXS; GIWAXS; in situ; micro-reactor