Abstract: Oxygen adsorption over clean and carbon-modified silver surfaces has been studied by XPS and UPS in the temperature range 300–700 K under O2 pressures from 10−3 to 10 Pa. Adsorption over a clean silver surface at T>420 K leads to the appearance of atomically adsorbed oxygen on the surface, which is characterized by EB(O 1s) = 528.5 eV, high reactivity towards CO and a heat of adsorption of 100 kJ/mol. Subsurface oxygen is formed in small amounts. Increasing the O2 pressure to 10 Pa does not lead to the formation of new adsorption forms. At T < 420 K carbonate structures with EB(C 1s)=287.8 eV and EB(O 1s)=530.6 eV are formed on the surface. During interaction of O2 with the silver surface containing dissolved carbon in the bulk, the surface is modified by O and C due to CO bond formation in the subsurface region. The O2 adsorption at high pressures (10 Pa) on the modified surface is characterized by the formation of a new oxygen state with EB=530.3 eV. Based on UPS spectra characteristics (the peak at EBθ9.5 eV), this state is supposed to be of molecular form.

Cite: Boronin A.I. , Bukhtiyarov V.I. , Vishnevskii A.L. , Boreskov G.K. , Savchenko V.I.
XPS and UPS Studies of Oxygen Adsorption over Clean and Carbon-Modified Silver Surfaces
Surface Science. 1988. V.201. N1-2. P.195-210. DOI: 10.1016/0039-6028(88)90606-1 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Mar 25, 1987
Published print:	Jan 1, 1988
Accepted:	Feb 15, 1988
Published online:	Sep 23, 2002

Identifiers:

Web of science:	WOS:A1988P384300016
Scopus:	2-s2.0-0000056973
Elibrary:	30799377
Chemical Abstracts:	1988:499306
Chemical Abstracts (print):	109:99306
OpenAlex:	W1966140520

Citing:

DB	Citing
Web of science	81
Scopus	80
Elibrary	81
OpenAlex	77

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