OXIDATION OF CL-MODIFIED AG(111) UNDER UHV CONDITIONS AND ETHYLENE ADSORPTION ON THE OXIDIZED SURFACE

Authors
WU K WEI XM CAO YM WANG DZ GUO XX
Citation
K. Wu et al., OXIDATION OF CL-MODIFIED AG(111) UNDER UHV CONDITIONS AND ETHYLENE ADSORPTION ON THE OXIDIZED SURFACE, Catalysis letters, 26(1-2), 1994, pp. 109-121
Citations number
43
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
26
Issue
1-2
Year of publication
1994
Pages
109 - 121
Database
ISI
SICI code
1011-372X(1994)26:1-2<109:OOCAUU>2.0.ZU;2-9
Abstract
Oxidation of Cl-modified Ag(111) under UHV conditions was investigated using AES, ISS and HREELS. The results showed that Cl-modified Ag(111 ) can be easily oxidized at 550 K by 1 x 10(-6) mbar oxygen which was also heated to 550 K. With HREELS two fundamental vibrations at 600 an d 1000 cm-1 were detected for silver oxide and the multiple losses and combination excitations as well. Ethylene adsorption on the oxide was analyzed by HREELS. Surface hydroxyl species was formed at 230 K and stable to above 300 K, which is attributed to silver oxide. Ethylidyne was suggested to form concurrently with hydroxyl species.