Electrochemical characterisation and comparison of transport in Nafion films and particles

Abstract

The diffusional transport of the dication and monocation of methyl viologen, MV²⁺ and MV⁺, in hydrated Nafion films and particles is studied electrochemically. Methodology is established for characterising the relative rates of transport and for evaluating the diffusion coefficient of the two ions. The transport in the particles is shown to be significantly faster than in films of similar thickness whilst the diffusion of MV²⁺ is confirmed to be faster than that of MV⁺.