The presence of barium (θca. 0.1) at a Zn(0001) surface is shown to increase the rate of dioxygen bond cleavage by ca. 103 at 295 K; this provides further evidence for a mobile molecular precursor O2–(s) participating in the dynamics of the dissociative chemisorption of oxygen and first suggested by the probe-molecule approach used to search for transient surface oxygen states.
A. F. Carley, M. W. Roberts and W. Fancheng, J. Chem. Soc., Chem. Commun., 1992, 738 DOI: 10.1039/C39920000738
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