SciAct
Toggle navigation
  • EN
  • RU

Sections:

  • Articles
  • Books
  • Conference attendances
  • Conference theses
  • Patents

Structure and Dynamics of the Interface Between a Ag Single Crystal Electrode and an Aqueous Electrolyte Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Conference The Dynamic Electrode Surface : Berlin Meeting of Faraday Discussion 121
15-17 Apr 2002 , Berlin
Source Dynamic Electrode Surface : Faraday Discussions Meeting, April 15-17, 2002, Berlin, Germany
Compilation, 2002.
Journal Faraday Discussions
ISSN: 1359-6640 , E-ISSN: 1364-5498
Output data Year: 2002, Volume: 121, Pages: 181-198 Pages count : 18 DOI: 10.1039/b110843n
Authors Savinova Elena R. 1 , Scheybal Andreas 2 , Danckwerts Matthias 2 , Wild Ute 2 , Pettinger Bruno 2 , Doblhofer Karl 2 , Schlögl Robert 2 , Ertl Gerhard 2
Affiliations
1 Boreskov Institute of Catalysis, Russian Academy of Sciences, Pr. Akademika Lavrentieva 5, 630090 Novosibirsk, Russian Federation
2 Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany

Abstract: The aim of this work is to elucidate the initial steps of the electrochemical oxidation of Ag(111) in alkaline electrolytes. We use electrochemical as well as ex situ (XPS) and in situ (SHG) spectroscopic techniques to reconstruct the Ag(111)/electrolyte interface as a complex dynamic entity. Moving in the direction from negative to positive potentials we first observe specific adsorption of hydroxide ions, which starts at ca. −1.1 V vs. Ag/Ag2O in 0.1 M NaOH. SHG data prove that hydroxide retains its negative charge. At −0.3 V oxidation of the surface sets in with the formation of negatively charged adsorbed oxygen species and Ag+ ions, which give rise to peaks at 528.2 ± 0.2 eV and at 367.7 eV in the O 1s and the Ag 3d5/2 XP spectra, respectively. Around −0.1 V the adlayer is transformed into an ordered surface oxide phase which grows via a nucleation and growth mechanism. Above the reversible Ag/Ag2O potential the 2D Ag(I) oxide transforms into a 3D Ag(I) oxide. The electrochemical oxidation is compared with the previously studied gas-phase process, demonstrating both remarkable similarities as well as some differences.
Cite: Savinova E.R. , Scheybal A. , Danckwerts M. , Wild U. , Pettinger B. , Doblhofer K. , Schlögl R. , Ertl G.
Structure and Dynamics of the Interface Between a Ag Single Crystal Electrode and an Aqueous Electrolyte
In compilation Dynamic Electrode Surface : Faraday Discussions Meeting, April 15-17, 2002, Berlin, Germany. 2002. – C.181-198. DOI: 10.1039/b110843n publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Nov 26, 2001
Accepted: Jan 21, 2002
Published online: May 10, 2002
Identifiers:
publication_identifier.wos_identifier_type WOS:000177283000013
publication_identifier.scopus_identifier_type 2-s2.0-57249096936
publication_identifier.rinz_identifier_type 14165229
publication_identifier.accession_number_identifier_type 2002:587519
publication_identifier.chemical_accession_number_identifier_type 138:46206
Altmetrics: