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SERS and Fourier transform SERS studies of the hexacyanoferrate(III)‐hexacyanoferrate(II) couple on gold electrode surfaces
Author(s) -
Lowry R. B.
Publication year - 1991
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250221213
Subject(s) - raman spectroscopy , electrode , chemistry , adsorption , electrolyte , ion , electrochemistry , fourier transform infrared spectroscopy , surface enhanced raman spectroscopy , analytical chemistry (journal) , fourier transform , inorganic chemistry , electrode potential , resolution (logic) , raman scattering , chemical engineering , optics , organic chemistry , mathematical analysis , physics , mathematics , artificial intelligence , computer science , engineering
Surface‐enhanced Raman spectroscopy (SERS) and its Fourier transform (FT) variant were used to study the hexacyanoferrate(III)‐hexacyanoferrate(II) couple at the surface of gold electrodes. The effects of potential, Fe(CN) 6 3−concentration and base electrolyte (KCl) concentration were measured, and point to distortion of the Fe(CN) 6 3−ion on the surface of the electrode. The Fe(CN) 6 4−ion was found not to be strongly adsorbed when a base electrolyte concentration of > 10 m M was used, but the strong adsorption of the Fe(CN) 6 3−ion was demonstrated. The increased resolution that is possible when using the FT‐SERS technique allows for the partial resolution of bands in the CN stretching region, and thus the construction of a model for the hexacyanoferrate(III) system.