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The oxidation of CO with molecularly adsorbed oxygen has been investigated on the Ag(110) surface by means of the surface titration technique. By directly measuring the CO 2 production rate with a mass spectrometer, substantial reaction has been observed upon the admission of CO via a molecular beam onto an O 2 layer well below the dissociation temperature of molecular oxygen, which...
Molecular beam titration measurements of CO reacting with preadsorbed atomic oxygen show evidence of two kinetically distinct oxygen species on Ag(110) produced by the dissociation of molecular oxygen at 180 K. The CO 2 reaction pathways observed at various temperatures (100-200 K) can be rationalized on the basis of an extended Langmuir-Hinshelwood mechanism, which involves a competitive...
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