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Ex situ Scanning Tunneling Microscopy Study of Under-Potential Oxidation of a Ag(111) Electrode in an Alkaline Electrolyte Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Journal of Electroanalytical Chemistry
ISSN: 1572-6657
Output data Year: 2001, Volume: 500, Number: 1-2, Pages: 208-212 Pages count : 5 DOI: 10.1016/S0022-0728(00)00346-6
Tags Anodic oxidation, Oxygen adsorption, Scanning tunnelling microscopy, Silver
Authors Shaikhutdinov S.K. 1 , Savinova E.R. 2 , Scheybal A. 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, Lavrentie6a 5, Novosibirsk 630090, Russia

Funding (1)

1 Max Planck Society

Abstract: A Ag(111) single crystal electrode emersed from NaF+NaOH electrolyte (pH 11) under potential control in the interval between −0.8 V and +0.2 V vs. Hg | HgO was studied by scanning tunneling microscopy (STM) in an inert atmosphere. The STM images show that the oxidation of the Ag(111) surface starts above the point of zero charge and exhibits a nucleation-growth mechanism. It starts at the steps and extends to the terraces as the electrode potential is scanned positive. Potential reversal restores the initial surface morphology. The reaction-induced features imaged in STM as dark spots are assigned as islands of chemisorbed oxygen-containing species. The irregular shape of the islands points to the diffusion of ad-species as the limiting step of the process.
Cite: Shaikhutdinov S.K. , Savinova E.R. , Scheybal A. , Doblhofer K. , Schlögl R.
Ex situ Scanning Tunneling Microscopy Study of Under-Potential Oxidation of a Ag(111) Electrode in an Alkaline Electrolyte
Journal of Electroanalytical Chemistry. 2001. V.500. N1-2. P.208-212. DOI: 10.1016/S0022-0728(00)00346-6 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: May 11, 2000
Accepted: Aug 22, 2000
Published online: Mar 9, 2001
Published print: Mar 16, 2001
Identifiers:
publication_identifier.wos_identifier_type WOS:000168192000024
publication_identifier.scopus_identifier_type 2-s2.0-0035278534
publication_identifier.rinz_identifier_type 28174869
publication_identifier.accession_number_identifier_type 2001:173621
publication_identifier.chemical_accession_number_identifier_type 135:83278
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