In situ FTIR and XPS studies of the hexacyanoferrate Redox system

Evidence from in situ FTIR studies is provided for the presence of irreversibly adsorbed species on the platinum electrode in the hexacyanoferrate redox system in 0.5 M aqueous K 2 SO 4 at neutral pH. Both FTIR and XPS data show that the adsorbed species is Prussian blue, which is bound to platinum through the nitrogen of the CN group