Structure and Dynamics of the Interface Between a Ag Single Crystal Electrode and an Aqueous Electrolyte Full article
Conference |
The Dynamic Electrode Surface : Berlin Meeting of Faraday Discussion 121 15-17 Apr 2002 , Berlin |
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Source | Dynamic Electrode Surface : Faraday Discussions Meeting, April 15-17, 2002, Berlin, Germany Compilation, 2002. |
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Journal |
Faraday Discussions
ISSN: 1359-6640 , E-ISSN: 1364-5498 |
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Output data | Year: 2002, Volume: 121, Pages: 181-198 Pages count : 18 DOI: 10.1039/b110843n | ||||
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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 WOS Scopus РИНЦ
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 WOS Scopus РИНЦ
Dates:
Submitted: | Nov 26, 2001 |
Accepted: | Jan 21, 2002 |
Published online: | May 10, 2002 |
Identifiers:
Web of science | WOS:000177283000013 |
Scopus | 2-s2.0-57249096936 |
Elibrary | 14165229 |
Chemical Abstracts | 2002:587519 |
Chemical Abstracts (print) | 138:46206 |
OpenAlex | W2114905909 |