Capturing metal-support interactions in situ during the reduction of a Re promoted Co/γ-Al2O3 catalyst

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...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2016-02, Vol.52 (15), p.3239-3242
Main Authors: Tsakoumis, N E, Johnsen, R E, van Beek, W, Rønning, M, Rytter, E, Holmen, A
Format: Article
Language:English
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Summary: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.
ISSN:1364-548X
DOI:10.1039/c5cc09879c