Threefold-coordinated hollow adsorption site forc(4×2)-NO/Ni(111): A surface-extended x-ray-absorption fine-structure study
- 15 March 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 45 (11), 6337-6340
- https://doi.org/10.1103/physrevb.45.6337
Abstract
Surface-extended x-ray-absorption fine-structure studies on the c(4×2)-NO/Ni(111) system yield a nearest-neighbor O-Ni distance of 2.68±0.05 Å and show that NO adsorbs in threefold-coordinated hollow sites. This result casts doubt on the generally used method of adsorption site determination via molecular vibrational frequencies, which for this system led to an assignment of a twofold bridge site.Keywords
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