Table 2 The coordination numbers of Nafion and Aquivion on a Pt surface at 353.15 K, where the water contents (λ) were varied.

From: Molecular dynamics simulation study on the effect of perfluorosulfonic acid side chains on oxygen permeation in hydrated ionomers of PEMFCs

Pairs

Ionomer

λ = 2.92

λ = 6.15

λ = 9.77

λ = 13.83

C(center)–O(O2) (7.87 Å)

Nafion

6.18

5.68

5.35

5.15

Aquivion

5.91

4.22

4.05

3.82

O(side chain)–O(O2) (8.51 Å)

Nafion

7.56

6.60

5.94

5.64

Aquivion

7.14

4.79

4.55

4.30

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