Characterization of water structure on silver electrode surfaces by SERS with two-dimensional correlation spectroscopy

Analytical Chemistry
Renato C Ambrosio, Andrew A Gewirth

Abstract

Surface-enhanced Raman scattering (SERS) spectra were collected continuously during cyclic voltammetric measurements on silver electrodes in alkaline aqueous solution at room temperature. Three water librational modes as well as the bending mode peak were observed in cathodic potential range. The 2D-COS analysis of spectra collected in LiOH and KOH solutions showed that the librational bands appear prior to the bending band on the cathodic scan, while in CsOH solution the potential dependence of these bands was identical. A comparison of librational band frequencies revealed that the water molecules around Cs(+) cations arranged on the electrode surface were poorly hydrogen bonded in contrast to Li(+) and K(+). The water bending band of spectra collected in LiOH solution was found to be the convolution of two contributions, consistent with a two state model of water arranged on an electrode surface.

References

Jan 5, 2002·Science·Dietrich Menzel
Feb 28, 2002·Physical Review Letters·Karina Morgenstern, Jouko Nieminen
Oct 10, 2002·Journal of the American Chemical Society·Barbara HribarKen A Dill
Nov 10, 2005·Journal of the American Chemical Society·Zachary D SchultzAndrew A Gewirth
Jul 28, 2007·Journal of the American Chemical Society·Sang-Eun BaeAndrew A Gewirth
May 2, 2009·Journal of the American Chemical Society·Akira Yamakata, Masatoshi Osawa

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Citations

Dec 14, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Chunyuan SongYiping Zhao
Nov 5, 2019·The Journal of Chemical Physics·Matthias M WaegeleXiang Li
Jul 9, 2017·Analytical and Bioanalytical Chemistry·Meiran WuFeng Lu
Sep 19, 2018·Proceedings of the National Academy of Sciences of the United States of America·Irina V ChernyshovaSathish Ponnurangam
Sep 1, 2019·Nanomaterials·Hossein Dizajghorbani-AghdamPaul F McMillan

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