Electrode reactions, fuel cells Nafion® polymer

Figure 6.9. Impedance spectra for the oxygen reduction reaction at an electrode potential of 0.6 V. The catalyst layer of the electrode contains various Nafion loadings ( ) 0.2 ( ) 0.8 (A) 2.0 mg/cm2 [5], (Reprinted from Journal of Power Sources, 94(1), Song JM, Cha SY, Lee WM. Optimal composition of polymer electrolyte fuel cell electrodes determined by the AC impedance method, 78-84, 2001, with permission from Elsevier and the authors.)...

The greatest interest in Nafion (Nf), a perfluorinated polymer with sulfonate groups, derives from its consideration as a proton conducting membrane in fuel cells to many sensor applications [37], The use of Nf and other polyanions to control ion-transport during electrode reaction is a recurring theme [38], The electrodeposition of platinum nanoparticles at the Nafion (Nf) modified glassy carbon (GC) electrode (GC/Nf/Ptnano) by the two-step method... 

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