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Band Bending in Mg-Colored and O-2-Activated Ultrathin MgO(001) Films

Abstract : Ultrathin MgO films grown on Ag(001) have been investigated using X-ray and ultraviolet photoemission spectroscopies for oxide films successively exposed to Mg and O-2 flux. Studying work functions and layer-resolved Auger shifts allows us to keep track of band profiles from the oxide surface to the interface and reveal the charge-transfer mechanisms underlying the controlled creation of Mg-induced surface color centers and the catalytic enhancement of O-2 activation. Our results demonstrate that one can intimately probe the catalytic properties of metal-supported ultrathin oxide films by studying the electronic band alignment at interfaces.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01502359
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Submitted on : Tuesday, July 11, 2017 - 4:57:21 PM
Last modification on : Thursday, October 8, 2020 - 3:08:02 PM
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Thomas Jaouen, Baptiste Hildebrand, Philipp Aebi, Gabriel Delhaye, Sylvain Tricot, et al.. Band Bending in Mg-Colored and O-2-Activated Ultrathin MgO(001) Films. Journal of Physical Chemistry C, American Chemical Society, 2017, 121 (8), pp.4363-4367. ⟨10.1021/acs.jpcc.6b12541⟩. ⟨hal-01502359⟩

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