Na-induced bonding and bond-length changes for CO on Pt(111): A near-edge x-ray-absorption fine-structure study

Near-edge x-ray absorption fine-structure studies above the C and O K edges for CO on Pt(111) reveal a 4-eV shift of the sigma shape resonance when Na(0.2 monolayer) is coabsorbed. This allows determination of a Na-induced (0.12 +- 0.03)-A expansion of the C-O bond. Na does not affect the vertical m...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1985-03, Vol.54 (9), p.935-938
Hauptverfasser:	Sette, F, Stöhr, J, Kollin, EB, Dwyer, DJ, Gland, JL, Robbins, JL, Johnson, AL
Format:	Artikel
Sprache:	eng
Schlagworte:	360602 - Other Materials- Structure & Phase Studies ABSORPTION ABSORPTION SPECTRA ADSORPTION ALKALI METALS BOND LENGTHS CARBON COMPOUNDS CARBON MONOXIDE CARBON OXIDES CATALYSIS CHALCOGENIDES CHEMICAL BONDS CRYSTAL STRUCTURE DATA DIMENSIONS ELEMENTS EXPERIMENTAL DATA FINE STRUCTURE INFORMATION LENGTH MATERIALS SCIENCE METALS MODIFICATIONS NUMERICAL DATA OXIDES OXYGEN COMPOUNDS PLATINUM PLATINUM METALS RESONANCE ABSORPTION SODIUM SORPTION SORPTIVE PROPERTIES SPECTRA SPECTRAL SHIFT SURFACE PROPERTIES TRANSITION ELEMENTS X-RAY SPECTRA
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Near-edge x-ray absorption fine-structure studies above the C and O K edges for CO on Pt(111) reveal a 4-eV shift of the sigma shape resonance when Na(0.2 monolayer) is coabsorbed. This allows determination of a Na-induced (0.12 +- 0.03)-A expansion of the C-O bond. Na does not affect the vertical molecular orientation on the surface. Reduction and broadening of the 1s..-->..2..pi..( resonance and the CO bond lengthening in the presence of Na signifies substantially increased metal to CO backbonding.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.54.935