TY  - JOUR
AU  - Staikov, G.
AU  - Kunze, J.
AU  - Strehblow, H.-H.
TI  - In situ STM Study of the Initial Stages of Electrochemical Oxide Formation at the Ag(111)/0.1M NaOH(aq) Interface
JO  - Electrochemistry communications
VL  - 6
SN  - 1388-2481
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - PreJuSER-31348
SP  - 132 - 137
PY  - 2004
N1  - Record converted from VDB: 12.11.2012
AB  - The atomic structure of surface layers and the local changes of surface morphology during the initial stages of anodic oxidation of Ag(111) in an aqueous 0.1 M NaOH solution have been investigated by in situ scanning tunneling microscopy (STM) under different polarization conditions. The surface oxide formation starts at underpotentials, i.e. at electrode potentials E below the Nernst-potential E-3DAg2O (vs. SHE) = 0.4 V for the formation of the three-dimensional (3D) bulk Ag2O phase. An ordered overlayer showing distinct Moire pattern is observed in the potential range -0.1 V < E (vs. SHE) < 0.1 V. The appearance of the Moire structure is assigned to the strong OH adsorption, which induces a stretching of the 2D lattice of the OH-terminated topmost Ag(111) monolayer. In situ STM imaging at higher potentials (0.1 V < E (vs. SHE) < 0.3 V) shows the occurrence of a Ag dissolution process followed by an underpotential oxide formation in agreement with previous electrochemical measurements and in situ X-ray absorption studies. (C) 2003 Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000188507400007
DO  - DOI:10.1016/j.elecom.2003.10.027
UR  - https://juser.fz-juelich.de/record/31348
ER  -