Journal
FARADAY DISCUSSIONS
Volume 117, Issue -, Pages 313-320Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b004006l
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We present experimental evidence that abstraction is a common mechanism (similar to 50%) in the dissociative chemisorption of oxygen on Al(111) at a translational energy of 0.5 eV. As a result of this mechanism, individual isolated O-atoms are observed in scanning tunneling microscopy (STM). At this translational energy ordinary dissociative chemisorption processes also occur, resulting in pairs of adatoms. The ejected O-atoms originating from the abstraction reaction are detected in the gas phase using laser spectrometry. Together, these observations provide compelling evidence for the abstraction mechanism.
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