Abstract
Activity and stability of alumina-supported monometallic Ni, Rh and bimetallic Ni–Rh catalysts were studied towards carbon dioxide reforming of methane. The catalysts were prepared by the incipient wetness impregnation method with different contents of Rh and Ni and were characterized by H2 chemisorption, TPRH2, XRD, FT-IR and ToF-SIMS methods. The process of Ni–Rh alloy formation and nickel enrichment on alloy surface takes place during temperature-programmed hydrogen assisted decomposition of their precursors. Catalytic stability and resistance towards coke deposition for Rh/Al2O3 and Ni–Rh/Al2O3 catalysts are much higher than for Ni/Al2O3 and Ni–Rh/SiO2 systems, studied in the first part of this paper (Jóźwiak WK, Nowosielska M, Rynkowski JM, Appl. Catal. A 280:233, 2005).
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Acknowledgments
This work was partially supported by Grant No. PBZ/KBN/116/T09/2004 of the State Committee for Scientific Research. The authors are indebted to Prof. R. Fiedorow from the Adam Mickiewicz University of Poznan (UAM) for carrying out hydrogen chemisorption measurements.
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Nowosielska, M., Jozwiak, W.K. & Rynkowski, J. Physicochemical Characterization of Al2O3 Supported Ni–Rh Systems and their Catalytic Performance in CH4/CO2 Reforming. Catal Lett 128, 83–93 (2009). https://doi.org/10.1007/s10562-008-9737-5
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DOI: https://doi.org/10.1007/s10562-008-9737-5