Elucidating the Promotional Effect of Cerium in the Dry Reforming of Methane
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Embargo End Date:
2021-10-29
Type
ArticleAuthors
Rodriguez Gomez, AlbertoLopez-Martin, Angeles
Ramirez, Adrian
Gascon, Jorge

Caballero, Alfonso
KAUST Department
Chemical Engineering ProgramKAUST Catalysis Center (KCC)
King Abdullah University of Science and Technology KAUST Catalysis Center SAUDI ARABIA
Physical Science and Engineering (PSE) Division
Date
2020-11-19Embargo End Date
2021-10-29Submitted Date
2020-09-20Permanent link to this record
http://hdl.handle.net/10754/665830
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A series of Ni-Ce catalysts supported on SBA-15 has been prepared by co-impregnation, extensively characterized and evaluated in the carbon dioxide reforming of methane (DRM). The characterization by TEM, XRD and TPR has allowed us to determine the effect of metal loading on metal dispersion. Cerium was found to improve nickel location inside the mesopores of SBA-15 and to suppress coke formation during the DRM reaction. The analysis by XPS allowed us to associate the high cerium dispersion with the presence of low-coordinated Ce 3+ sites, being main responsible for its promotional effect. A combination of XAS and XPS has permitted us to determine the physicochemical properties of metals under reduction conditions. The low nickel coordination number determined by XAS in Ni-Ce doped systems after reduction suggests the generation of very small nickel particles which showed greater catalytic activity and stability in the reaction, and a remarkable resistance to coke formation.Citation
Rodriguez Gomez, A., Lopez-Martin, A., Ramirez, A., Gascon, J., & Caballero, A. (2020). Elucidating the Promotional Effect of Cerium in the Dry Reforming of Methane. ChemCatChem. doi:10.1002/cctc.202001527Publisher
WileyJournal
ChemCatChemAdditional Links
https://onlinelibrary.wiley.com/doi/10.1002/cctc.202001527ae974a485f413a2113503eed53cd6c53
10.1002/cctc.202001527