Catalytic Dry Reforming of Methane on Ruthenium-Doped Ceria and Ruthenium Supported on Ceria
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Two types of Ru–ceria catalysts were investigated, one prepared by combustion to create an atomically doped metal oxide, and the other, prepared by impregnation, as supported Ru oxide. They have different physical properties (as measured by X-ray photoelectron spectroscopy, X-ray diffraction, and Infrared spectra of adsorbed CO) but identical catalytic activity for dry reforming of methane. We show that the catalyst for dry reforming is partially reduced using XPS and IR spectroscopy. Furthermore, transient oxidation reaction spectroscopy with oxygen pulses confirms partial reduction of the catalyst is necessary for dry reforming activity.
KeywordsCeria Ruthenium Methane Dry reforming Doped oxide catalysts
Funding for this work was provided by the Air Force Office of Scientific Research (FA9550-12-1-0147) and the U.S. Department of Energy (DE-FG02-89ER140048). The Advanced Photon Source is supported by the Department of Energy, Office of Basic Energy Sciences under contract no. DE-AC02-06CH11357. We thank Tom Mates for help in gathering XPS spectra. ARD would like to thank the National Science Foundation for a Graduate Research Fellowship under grant DGE 0707430. Financial support of GMM and the MRL Central Facilities are supported by the MRSEC Program of the National Science Foundation (NSF) under Award No. DMR 1121053; a member of the NSF-funded Materials Research Facilities Network (www.mrfn.org).
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