Oxygen states present at a Ag(111) surface in the presence of ammonia: evidence for a NH3–O2δ– complex
Abstract
Molecular oxygen states present at Ag(111) surfaces when dioxygen is coadsorbed with ammonia at 80 K are characterised by vibrational loss features at 1488 and 1640 cm–1. The former is suggested to be associated with the NH3···O2δ– complex, a key intermediate in the oxidation pathway.