Phys. Rev. Lett. 95, 266102 (2005) [4 pages]Stabilizing CO on Au with NO2: Electronegative Species as Promoters on Coinage Metals?Received 16 August 2005; published 22 December 2005 CO adsorption on NO2-predosed Au{111} reveals an unexpected attractive coadsorbate interaction, associated with an unprecedented blueshift of the CO stretch frequency, a sizeable attenuation of the infrared NO2 symmetric stretch band, and a (√7×√7)R19° structure characterized by scanning tunneling microscopy and low energy electron diffraction. Density functional calculations allow us to rationalize these observations, and point towards a general pattern of behavior for electronegative coadsorbates on coinage metals, with important implications for catalytic promotion. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.266102
DOI:
10.1103/PhysRevLett.95.266102
PACS:
68.43.Hn, 68.37.Ef, 68.43.Pq, 82.65.+r
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