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 (Rct) of V(v) ions on a graphite electrode are both observed at a transition potential (EK). The possible vanadium complexes such as V2O3(3+) might result in the change of reduction mechanism and the unusual phenomena.