Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 13, Issue 11, Pages 1205-1208Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2011.08.043
Keywords
X-ray scattering; Silver; Cations; Interface structure; Hydroxide; Alkaline electrolyte
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Funding
- Office of Science, Office of Basic Energy Sciences, Materials Science Division (MSD), US Department of Energy (DOE) [DE-AC03-76SF00098]
- EPSRC
- EPSRC [EP/F000375/1, EP/G068372/1, EP/F036418/1, EP/F000766/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G068372/1, EP/F000766/1, EP/F000375/1, EP/F036418/1] Funding Source: researchfish
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The structure of the electrochemical double layer at the interface between a Ag(111) electrode and 0.1 M KOH electrolyte has been probed using in-situ surface X-ray scattering (SXS). Detailed modeling of the SXS data at negative potential (E = -1.0 V versus SCE) is consistent with the presence of an hydrated K(+) cation layer at a distance of 4.1 +/- 0.3 angstrom from the Ag surface and at positive potential (E = -0.2 V), indicates that the presence of OH(ad) stabilizes the hydrated K(+) cations through a non-covalent interaction forming a compact double layer structure in which the Ag-K(+) distance is reduced to 3.6 +/- 0.2 angstrom. (C) 2011 Elsevier B.V. All rights reserved.
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