title: Capturing metal-support interactions in situ during the reduction of a Re promoted Co/γ-Al2O3 catalyst.
abstract: The reduction of a Re promoted Co/γ-Al2O3 catalyst was monitored in situ by synchrotron X-ray powder diffraction (XRPD) under H2 environment. Whole powder pattern analysis revealed a non-linear expansion of the unit cell of γ-Al2O3 during the reduction process, suggesting the diffusion of Co cations into the structure of the support. The non-linear cell expansion coincided with the formation of a CoO phase. In addition, space resolved diffraction at the inlet and the outlet of the reactor evidenced a negative effect of the partial pressure of indigenous H2O(g) on the reduction process.
authors.affiliation: Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway. nikolaos.tsakoumis@ntnu.no.
authors.forename: N E
authors.initials: NE
authors.lastname: Tsakoumis
authors.affiliation: Department of Energy Conversion and Storage, Technical University of Denmark, DK-4000 Roskilde, Denmark.
authors.forename: R E
authors.initials: RE
authors.lastname: Johnsen
authors.affiliation: Swiss-Norwegian Beamlines at ESRF, BP 220, Grenoble 38043, France.
authors.forename: W
authors.initials: W
authors.lastname: van Beek
authors.affiliation: Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway. nikolaos.tsakoumis@ntnu.no.
authors.forename: M
authors.initials: M
authors.lastname: Rønning
authors.affiliation: Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway. nikolaos.tsakoumis@ntnu.no and SINTEF Materials and Chemistry, NO-7465 Trondheim, Norway.
authors.forename: E
authors.initials: E
authors.lastname: Rytter
authors.affiliation: Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway. nikolaos.tsakoumis@ntnu.no.
authors.forename: A
authors.initials: A
authors.lastname: Holmen