Ex Situ X-ray Photoelectron Spectroscopy Study of the Interface between a Ag(111) Electrode and an Alkaline Electrolyte. 1. Influence of the Electrode Potential on the Adsorption of Oxygen Species
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Langmuir
ISSN: 0743-7463
, E-ISSN: 1520-5827
|
| Output data |
Year: 1999,
Volume: 15,
Number: 19,
Pages: 6546-6551
Pages count
: 6
DOI:
10.1021/la9817617
|
| Authors |
Savinova E.R.
1
,
Zemlyanov D.
2
,
Scheybal A.
1
,
Schedel-Niedrig Th.
1
,
Doblhofer K.
1
,
Schlögl R.
1
|
| Affiliations |
| 1 |
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
|
| 2 |
Boreskov Institute of Catalysis, Russian Academy of Sciences, Pr. Akademika Lavrentieva 5, 630090 Novosibirsk, Russian Federation
|
|
Funding (2)
|
1
|
Alfred Toepfer Stiftung F.V.S.
|
|
|
2
|
Max Planck Society
|
|
A Ag(111) single-crystal electrode emersed from the NaF + NaOH electrolyte (pH 11) under the anodic polarization has been studied ex situ by means of X-ray photoelectron spectroscopy. The oxidation of the electrode starts at −0.6 V vs Hg/HgO (ca. 1 V negative to the reversible potential of Ag2O phase formation) and manifests itself by the appearance of different surface and bulk oxygen-containing species. These are surface OH groups (OHads), surface oxide-like species ( ), and bulk OH groups (OHbulk). The OHbulk exhibit high thermal stability in a vacuum but can be efficiently removed from the electrode via cathodic polarization.