Ferricyanide and ferrocyanide are often used in undergraduate education to experimentally investigate the redox behaviour, the different thermodynamic stability and the formation of Prussian Blue. Surface-enhanced Raman scattering (SERS) on colloids is intensively studied in chemistry, but the didactic implications in terms of developing easy-to-perform experiments have not been intensively discussed. These experiments show the spectroelectrochemical behaviour (optical and Raman) of the redox system on gold and silver electrodes at different potentials. The SERS experiments show that the Raman modes are changed due to the strong adsorption on the electrochemically prepared Au and Ag surfaces. Prussian blue can be easily prepared electrochemically.

(Surface enhanced) Raman Spectroscopy, absorptovoltammetry