The results obtained with solid electroactive microparticles immobilized on a graphite electrode surface using cyclic voltammetry and in situ microRaman measurements at selected potentials allowed us to complete the understanding of the spectroelectrochemical behaviours of Prussian blue, beta-PbO and Bi2O3. In the case of Prussian blue, we provided a simple but complete analysis of the Raman spectral data for the species Fe[Fe(CN)(6)] and K2Fe[Fe(CN)(6)]. The investigation of PbO in neutral chloride media showed that Pb(OH) Cl is the Pb degrees electrochemical oxidation product whereas the study of Bi2O3 demonstrated that the oxidation of Bi degrees in alkaline solutions leads essentially to amorphous Bi(OH)(3). (C) 2017 Elsevier Ltd. All rights reserved.