Abstract: Identification of oxygen species active in ethylene epoxidation on silver catalysts with Raman spectroscopy and DFT calculations (22nd North American Catalysis Society Meeting)

Wednesday, June 8, 2011: 10:40 AM

Ambassador Ballroom 1 (Detroit Marriott Hotel at the Renaissance Center )

Tao Chen¹, Amrita Pal¹, Jih-Mirn Jehng², Israel E. Wachs³ and Simon G. Podkolzin¹, (1)Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, NJ, (2)Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan, (3)Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical Engineering, Lehigh University, Bethlehem, PA

The nature of catalytic active oxygen species in ethylene epoxidation was studied using a series of Ag/Al₂O₃ catalysts with in-situ Raman spectroscopy and DFT calculations. Our results suggest that oxygen binds to the lattice oxygen of oxidized Ag, forming "hybrid" O-adsorbed-O-lattice surface species that are preferentially consumed during the reaction.

Extended Abstracts:

20101202_NAM22_Silver_abstract.pdf (1842.0KB) - Extended Abstract

See more of: Epoxidation of Olefins
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OD36 Identification of oxygen species active in ethylene epoxidation on silver catalysts with Raman spectroscopy and DFT calculations