ArticleProceedings of the National Academy of Sciences of the United States of America2019
Correlated interfacial water transport and proton conductivity in perfluorosulfonic acid membranes.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 56 citations in OpenAlex.
- Rheology of Aqueous Solutions in the Presence of Proton Exchange Membrane: Surface Tension.Polymers · 2025Article
- Impact of Titanium Dioxide on Water Uptake and Diffusion in Nafion.The journal of physical chemistry. C, Nanomaterials and interfaces · 2025Article
- Superprotonic Conductivity of Guanidinium Organosulfonate Hydrogen-Bonded Organic Frameworks with Nanotube-Shaped Proton Transport Channels.Precision chemistry · 2023Article
- Permselectivity and Ionic Conductivity Study of NaMembranes · 2023Article
- Highly Altered State of Proton Transport in Acid Pools in Charged Reverse Micelles.Journal of the American Chemical Society · 2023Article
- Proton Traffic Jam: Effect of Nanoconfinement and Acid Concentration on Proton Hopping Mechanism.Angewandte Chemie (International ed. in English) · 2021Article
- Donnan Membrane Process for the Selective Recovery and Removal of Target Metal Ions-A Mini Review.Membranes · 2021Review
- OHMembranes · 2021Article
- Direct observation of water-mediated single-proton transport between hBN surface defects.Nature nanotechnology · 2020Article
- Preparation of Covalent-Ionically Cross-Linked UiO-66-NHFrontiers in chemistry · 2020Article
- A Novel Method for Humidity-Dependent Through-Plane Impedance Measurement for Proton Conducting Polymer Membranes.Membranes · 2019Article
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Authors and funding
4 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Water must be effectively transported and is also essential for maximizing proton conductivity within fuel-cell proton-exchange membranes (PEMs). Therefore, identifying relationships between PEM properties, water transport, and proton conductivity is essential for designing optimal PEMs. Here, we use coherent Raman spectroscopy to quantify real-time, in situ diffusivities of water subspecies, bulk-like and nonbulk-like (interfacial) water, in five different perfluorosulfonic acid (PFSA) PEMs. Although the PEMs were chemically diverse, water transport within them followed the same rule: Total water diffusivity could be represented by a linear combination of the bulk-like and interfacial water diffusivities. Moreover, the diffusivity of interfacial water was consistently larger than that of bulk-like water. These measurements of microscopic transport were combined with through-plane proton conductivity measurements to reveal the correlation between interfacial water transport and proton conductivity. Our results demonstrate the importance of maximizing the diffusivity and fractional contribution of interfacial water to maximize the proton conductivity in PFSA PEMs.
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