On the determination of zero charge potentials of platinum group metals in the presence of foreign metal adatoms on the surface

Investigations of fuel cell reactions at the composite microelectrode|solid polymer electrolyte interface. I. Hydrogen oxidation at the nanostructured Pt|Nafion® membrane interface

“…Table 3 Exchange current density (j 0 ) for the hor on a H I -ePt microelectrode in 0.5 mol dm À3 H 2 SO 4 and in contact with a Nafion Ò 117 membrane at given temperatures, and the resultant calculated activation energy (E a ) actions than those in the hydrophobic regions. In dilute acidic solution, the zero charge potential was measured as being about 0.32 V vs. SHE [82]. Therefore, the adsorption of impurities on the Pt electrode and the interaction between the electrode and the phase-structure of the Nafion Ò membrane are strongly potential-dependent because of the change in surface charge.…”