nanoparticle: 6 nm Pt cube
surface: clean graphite
film: Nafion (15-mer with EW=1144)
water content: λ = 3 H
2
O/HSO
3
separation distance: minimum
dark gray = CF
2
of Nafion and C of graphite
white = H
beige = S
red = O of water and Nafion
pale pink = O of hydronium ion
light gray = Pt