MSE Colloquium
Date: February 28, 2014 from 11:00 am to 12:00 pm EST
Location: Room 214, S.W. Mudd
Contact: For further information regarding this event, please contact Wesley Hattan by sending email to wjh2121@columbia.edu or by calling 2128547860.
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Bookmark and Share  Kwang Taeg Rim, Columbia University

"Investigation of Catalytic Reactions on Iron Oxide Surfaces towards the Understanding of Steam Reforming of Methanol with STM, TPD, DFT"
 
The reaction of simple molecules with different iron oxide surfaces has been the subject of numerous studies, primarily due to the importance of iron oxide as a model mineral crystal for studying basic environmental studies and its importance in hydrogen generation for fuel cell applications. In particular, the reactivity of Fe3O4 (111) surface with methanol is of interest for Hydrogen fuel-cell technology applications.

In this talk, we present catalytic reaction of fully deuterated methanol (CD3OD) on a reduced surface of a natural single-crystal α-Fe2O3(0001) sample, composed of areas of Fe-terminated Fe3O4(111), O-terminated FeO(111), and bi-phase surface. Our study was carried out in ultrahigh vacuum with scanning tunneling microscopy, temperature programmed desorption, and density function theory calculations.

Gold, regarded as a catalytically inert precious metal, shows surprisingly high catalytic activity for many reactions once the size of it becomes small (<10 nm). We also present the water-gas shift reaction, important in steam reforming of methanol for H2 production, on gold nano-particles supported on reduced iron oxide.