Abstract
Upon CO exposure to a Mo(110) surface at 95 K, the initial ≈0.3 monolayer (ML) of CO does not exhibit a vibrational frequency in the 1800–2200 cm − region, implying that the CO axis is tilted with respect to the surface normal. Upon subsequent deposition of ≈0.9 ML Cu at 95 K followed by heating, infrared-reflection-adsorption-spectroscopy (IRAS) shows that a portion of the tilted CO molecules diffuses onto the Cu overlayer and assumes an upright bonding geometry, with the remainder dissociating on the Mo(110) surface into atomic C and O.
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