Adsorbate migration on PdAg(111)

Authors
Wouda, PT Schmid, M Nieuwenhuys, BE Varga, P
Citation
Pt. Wouda et al., Adsorbate migration on PdAg(111), SURF SCI, 423(1), 1999, pp. L229-L235
Citations number
23
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
423
Issue
1
Year of publication
1999
Pages
L229 - L235
Database
ISI
SICI code
0039-6028(19990301)423:1<L229:AMOP>2.0.ZU;2-C
Abstract
Scanning tunneling microscopy (STM) was used to study the adsorption of oxy gen on the PdAg(111) surface. Oxygen appears as dark holes of ca 40 pm dept h, whereas palladium atoms appear as bright spots. By comparing consecutive STM images, oxygen was found to occupy only palladium sites: the oxygen wa s found to travel exclusively to and from the palladium atoms. The surface concentration of oxygen was low under all the experimental conditions used, as indicated by STM as well as Auger electron spectroscopy. (C) 1999 Elsev ier Science B.V. All rights reserved.