Abstract
The adsorption of CO and NO on a hydrogen presaturated Ni(510) surface has been studied with electron energy loss spectroscopy (HREELS). We find that the initial CO adsorption at the step sites is blocked and that a mixed on-top-bridge adsorption on the terraces is altered to exclusively on-top. NO still adsorbs at the steps but with a much less weakened internal bond. A strongly bent NO adsorption state on the terraces is inhibited. At saturation coverages both CO and NO adsorb on terrace and step sites. For all coverages the terrace adsorption is, for both CO and NO, essentially identical to the behaviour observed on the Ni(100)p(1 × 1)H surface.
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