[Zurück]


Zeitschriftenartikel:

R. Thalinger, T. Götsch, C. Zhuo, W. Hetaba, W. Wallisch, M. Stöger-Pollach, D. Schmidmair, B. Klötzer, S. Penner:
"Rhodium-Catalyzed Methanation and Methane Steam Reforming Reactions on Rhodium-Perovskite Systems: Metal-Support Interaction";
ChemCatChem, 8 (2016), S. 2057 - 2067.



Kurzfassung englisch:
Metal-support interaction in rhodium-perovskite systems was
studied using LSF (La0.6Sr0.4FeO3¢d) and STF (SrTi0.7Fe0.3O3¢d) supports
to disentangle different manifestations of strong or reactive
metal-support interaction. Electron microscopy and catalytic
characterization in methane steam reforming/CO2 methanation
reveal that reduction in hydrogen at 673 K and 873 K
causes different extents of Fe exsolution. Depending on the
perovskite reducibility, Fe-Rh alloy particles are observed. No
signs of strong metal-support interaction (i.e., encapsulation
of metal particles) by reduced oxide species were observed. As
re-oxidation in oxygen at 873 K did not fully restore the initial
structures, the interaction between Rh and the perovskites
manifests itself in irreversible alloy formation. Catalytic effects
are the suppression of methane reactivity with increasing prereduction
temperature. The results show the limits of the
strong metal-support interaction concept in complex metal-
oxide systems.


"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1002/cctc.201600262


Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.