nanoparticle: 4 nm Pt cube
surface: 50% hydroxyl oxidized graphite
film: Nafion (15-mer with EW=1144)
water content: λ = 15 H
2
O/HSO
3
gray = CF
2
of Nafion and C of graphite
white = H
orange = S
red = O
pale pink = O of hydronium ion
light gray = Pt