Figure 9. Potential dependent SERS Raman spectra of K4[Fe(CN)6]. Potential from -0.3 V to +0.6 V. The A1g frequency shifts from 2100 cm-1 (at -0.3 V) to about 2090 cm-1 (at 0.6 V)

From

Combining Optical and Raman Spectroscopy with Electrochemistry: The Ferricyanide and Ferrocyanide System - Experiments for Undergraduates

A. Habekost

World Journal of Chemical Education. 2024, 12(1), 30-38 doi:10.12691/wjce-12-1-5