Unusual phenomena in the reduction process of vanadium(v) on a graphite electrode at high overpotentials

Abstract

An abrupt increase in the Tafel slope and the charge transfer resistance (R_ct) of V(V) ions on a graphite electrode are both observed at a transition potential (E_K). The possible vanadium complexes such as V₂O₃³⁺ might result in the change of reduction mechanism and the unusual phenomena.