Electrochemical behaviour of hexacyanoferrate(II) on a gold electrode modified with bis(4-pyridyl) disulfide

Abstract

The electochemical behaviour of hexacyanoferrate (II) has been studied by using a bis(4-pyridyl)disulfide modified gold electrode. On the protonated electrode surface, hexacyanopferrate(II) can transfer an electron reversibly but no apparent adsorption was detected. On the deprotonated electrode surface, electron transfer, by hexacyanoferrate(II) was more difficult. The electrochemical reversibility varied with the pH of the solution. Relationships between the currents or the standard heterogeneous rate constants and pH were derived.