Novel micro-reactor flow cell for investigation of model catalysts using in situ grazing-incidence X-ray scattering.

Research paper by Jan J Kehres, Thomas T Pedersen, Federico F Masini, Jens Wenzel JW Andreasen, Martin Meedom MM Nielsen, Ana A Diaz, Jane Hvolbæk JH Nielsen, Ole O Hansen, Ib I Chorkendorff

Indexed on: 27 Feb '16Published on: 27 Feb '16Published in: Journal of Synchrotron Radiation


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.