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dc.contributor.authorSenanayake, Sanjaya D.
dc.contributor.authorMudiyanselage, Kumudu
dc.contributor.authorBurrell, Anthony K
dc.contributor.authorSadowski, Jerzy T.
dc.contributor.authorIdriss, Hicham
dc.date.accessioned2016-02-25T14:17:37Z
dc.date.available2016-02-25T14:17:37Z
dc.date.issued2015-10-23
dc.identifier.citationThe Surface Reactions of Ethanol over UO2(100) Thin Film 2015:151008144757007 The Journal of Physical Chemistry C
dc.identifier.issn1932-7447
dc.identifier.issn1932-7455
dc.identifier.doi10.1021/acs.jpcc.5b08577
dc.identifier.urihttp://hdl.handle.net/10754/598731
dc.description.abstractThe study of the reactions of oxygenates on well-defined oxide surfaces is important for the fundamental understanding of heterogeneous chemical pathways that are influenced by atomic geometry, electronic structure and chemical composition. In this work, an ordered uranium oxide thin film surface terminated in the (100) orientation is prepared on a LaAlO3 substrate and studied for its reactivity with a C-2 oxygenate, ethanol (CH3CH2OH). With the use of synchrotron X-ray photoelectron spectroscopy (XPS), we have probed the adsorption and desorption processes observed in the valence band, C1s, O1s and U4f to investigate the bonding mode, surface composition, electronic structure and probable chemical changes to the stoichiometric-UO2(100) [smooth-UO2(100)] and Ar+-sputtered UO2(100) [rough-UO2(100)] surfaces. Unlike UO2(111) single crystal and UO2 thin film, Ar-ion sputtering of this UO2(100) did not result in noticeable reduction of U cations. The ethanol molecule has C-C, C-H, C-O and O-H bonds, and readily donates the hydroxyl H while interacting strongly with the UO2 surfaces. Upon ethanol adsorption (saturation occurred at 0.5 ML), only ethoxy (CH3CH2O-) species is formed on smooth-UO2(100) whereas initially formed ethoxy species are partially oxidized to surface acetate (CH3COO-) on the Ar+-sputtered UO2(100) surface. All ethoxy and acetate species are removed from the surface between 600 and 700 K.
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubsdc3.acs.org/doi/10.1021/acs.jpcc.5b08577
dc.titleThe Surface Reactions of Ethanol over UO2(100) Thin Film
dc.typeArticle
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUST
dc.identifier.journalThe Journal of Physical Chemistry C
dc.contributor.institutionThe Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973
dc.contributor.institutionCSE Electrochemical Energy Storage Department, Argonne National Laboratory, Argonne, Illinois 60439
dc.contributor.institutionCenter for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973
kaust.personIdriss, H.
dc.date.published-online2015-10-23
dc.date.published-print2015-11-05


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