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  Ex situ scanning tunneling microscopy study of under-potential oxidation of a Ag(111) electrode in an alkaline electrolyte

Shaikhutdinov, S. K., Savinova, E. R., Scheybal, A., Doblhofer, K., & Schlögl, R. (2001). Ex situ scanning tunneling microscopy study of under-potential oxidation of a Ag(111) electrode in an alkaline electrolyte. Journal of Electroanalytical Chemistry, 500(1-2), 208-212. doi:10.1016/S0022-0728(00)00346-6.

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 Creators:
Shaikhutdinov, Shamil K.1, Author              
Savinova, Elena R.2, Author              
Scheybal, Andreas3, Author              
Doblhofer, Karl2, Author              
Schlögl, Robert3, Author              
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              
2Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
3Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: Silver; Oxygen adsorption; Anodic oxidation; Scanning tunnelling microscopy
 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.

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Language(s): eng - English
 Dates: 2000-08-112000-05-112000-08-222001-03-092001-03-16
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 289283
DOI: 10.1016/S0022-0728(00)00346-6
 Degree: -

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Title: Journal of Electroanalytical Chemistry
  Other : J. Electroanal. Chem.
  Other : Journal of Electroanalytical Chemistry and Interfacial Electrochemistry
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 5 Volume / Issue: 500 (1-2) Sequence Number: - Start / End Page: 208 - 212 Identifier: ISSN: 0022-0728
CoNE: https://pure.mpg.de/cone/journals/resource/954928572675