TY - JOUR
T1 - Adsorbate characterisation by correlation of various photoelectron spectroscopies
T2 - CO on W(110)
AU - Umbach, E.
AU - Fuggle, J. C.
AU - Menzel, D.
N1 - Funding Information:
We are grateful to W. B&k and M. Steinkilberg for technical assistance. This work has been supported financially by the Deutsche Forschungsgemeinschaft through Sonderforschungsbereich 128.
PY - 1977
Y1 - 1977
N2 - As a test of the value of various electron spectroscopies and their combination for the characterisation of adsorption states, UPS valence spectra, XPS core spectra (O (1s) and C (1s)) and core satellite spectra (O (1s)), and X-ray induced Auger spectra (O KLL) were measured for various adsorption layers of CO on W(110) prepared at and above room temperature and, for comparison, of oxygen on the same surface. Virgin- and β-CO can readily be distinguished in all four kinds of spectra, while α-CO shows spectra very similar to those of virgin-CO. The conversion of virgin- to β-CO and their desorption can be followed in some detail. For all four techniques, the oxygen derived spectra of β-CO are identical to those of adsorbed oxygen, at about half the intensity. This makes it very likely that CO is dissociated in the β-layer on W(110). Virgin- and α-CO show the typical features of molecularly-adsorbed CO.
AB - As a test of the value of various electron spectroscopies and their combination for the characterisation of adsorption states, UPS valence spectra, XPS core spectra (O (1s) and C (1s)) and core satellite spectra (O (1s)), and X-ray induced Auger spectra (O KLL) were measured for various adsorption layers of CO on W(110) prepared at and above room temperature and, for comparison, of oxygen on the same surface. Virgin- and β-CO can readily be distinguished in all four kinds of spectra, while α-CO shows spectra very similar to those of virgin-CO. The conversion of virgin- to β-CO and their desorption can be followed in some detail. For all four techniques, the oxygen derived spectra of β-CO are identical to those of adsorbed oxygen, at about half the intensity. This makes it very likely that CO is dissociated in the β-layer on W(110). Virgin- and α-CO show the typical features of molecularly-adsorbed CO.
UR - http://www.scopus.com/inward/record.url?scp=0002664867&partnerID=8YFLogxK
U2 - 10.1016/0368-2048(77)85002-0
DO - 10.1016/0368-2048(77)85002-0
M3 - Article
AN - SCOPUS:0002664867
SN - 0368-2048
VL - 10
SP - 15
EP - 34
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
IS - 1
ER -