Fig. 2: Morphology, composition distribution and molecular dynamics (MD) simulations of FOH-Nafion film. | Nature Communications

Fig. 2: Morphology, composition distribution and molecular dynamics (MD) simulations of FOH-Nafion film.

From: Ionomer engineering for optimized water channels in industry-scale water electrolysis using non-noble metal catalyst

Fig. 2: Morphology, composition distribution and molecular dynamics (MD) simulations of FOH-Nafion film.

HR-TEM images of (a) Nafion and (e) FOH-Nafion. The marked dark regions represent the ionic cluster. The contrast of color in FOH-Nafion is much weaker than in Nafion. Spherical aberration-corrected HAADF-STEM images and XEDS elemental mappings of F (red) and S (blue) in (b) Nafion and (f) FOH-Nafion. F and S are more evenly dispersed in FOH-Nafion. Molecular models of (c) Nafion and (d) FOH-Nafion with water molecules (V-shape) after MD simulations. The Nafion molecule is represented by a ball-and-stick model, while CF3CF2CF2CH2OH molecule is represented by a stick model (Supplementary Fig. 9). Element color codes: gray (C), cyan (F), red (O), white (H), yellow (S). g Radial density distribution profiles of S-H2O in Nafion and FOH-Nafion, suggesting that FOH-Nafion is more accessible to the water molecule than Nafion. Source data are provided as a Source Data file.

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