Vibrational Fine Structure in C 1s High-Resolution Core-Level Spectra of CO Chemisorbed on Ir(111)

被引：2

作者：

Baronio, Stefania ^{[1
]}

De Leo, Valeria ^{[1
]}

Lautizi, Ginevra ^{[1
]}

Mantegazza, Paola ^{[1
]}

Natale, Eleonora ^{[1
]}

Tuniz, Manuel ^{[1
]}

Vigneri, Stefano ^{[1
]}

Bignardi, Luca ^{[1
]}

Lacovig, Paolo ^{[2
]}

Lizzit, Silvano ^{[2
]}

Baraldi, Alessandro ^{[1
,2
]}

机构：

[1] Univ Trieste, Dept Phys, I-34127 Trieste, Italy

[2] Elettra Sincrotrone Trieste, I-34149 Trieste, Italy

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2022年 / 126卷 / 03期

关键词：

CARBON-MONOXIDE; IN-SITU; PHOTOELECTRON-SPECTROSCOPY; DESORPTION-KINETICS; CHEMICAL-SHIFT; ADSORPTION; PHOTOEMISSION; SURFACE; PT(111); TRANSITION;

D O I：

10.1021/acs.jpcc.1c09646

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The vibrational features of carbon monoxide (CO) adsorbed on Ir(111) were studied by means of high-resolution core-level spectroscopy. By monitoring the Ir 4f(7/2) core level as a function of exposure, we proved that the CO adsorbs on the surface always in on-top sites, in agreement with the results of vibrational spectroscopy techniques and density functional theory studies. The C 1s vibrational splittings measured for the p(root 3 x root 3)R30 degrees (233.4 +/- 0.5 meV) and c(4 x 2 root 3)rect (231.4 +/- 0.4 meV) structures were in good agreement with the Z + 1 model. Despite the very small error bar of the measurements, it was not possibile to reveal any anharmonic contribution to the spectral lineshape. We speculate that the contribution of the unresolved vibrational mode of the frustrated translation or the effect of phonon-mediated interaction with the substrate can account for the observation of this outcome.

引用

页码：1411 / 1419

页数：9

共 51 条

[1] Vibrational fine structure in the C 1s core level photoemission of chemisorbed molecules: Ethylene and ethylidyne on Rh(111) [J].