Figure 3

Snapshots of equilibrated systems comprising the Pt (111) surface, hydrated Nafion ionomers, and O2 molecules with λ values of (a) 2.92, (b) 6.15, (c) 9.77, and (d) 13.83; snapshots of equilibrated systems comprising the Pt (111) surface, hydrated Aquivion ionomers, and O2 molecules with λ values of (e) 2.92, (f) 6.15, (g) 9.77, and (h) 13.83.