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- W2023843957 abstract "3M PFSA ionomer membranes were doped with heteropoly acids (HPA) and the ionomer/HPA interaction characterized by attenuated total reflection FTIR, pulse field gradient spin echo NMR and small-angle X-ray scattering. The HPA doping was achieved by casting a mixed solution containing both components. Three Keggin-type HPAs were used in this work: 12- phosphotungstic acid, 12-silicotungstic acid, and 12- zincotungstic acid, at doping concentrations of 1 and 5wt %, respectively. FTIR spectra of the composite membranes clearly show the presence of the HPA and evidence for different interactions under different hydration states. Proton diffusion coefficients were determined by PFGSE NMR under dry and 100 % RH from room temperature to 130 {degree sign}C. SAXS patterns of the control PFSA and the HPA-doped PFSA membranes were recorded under dry and wet conditions. Scattering behavior for different samples and conditions are remarkably different, consistent with the incorporation of HPA and the swelling of the ionomer clusters under hydration." @default.
- W2023843957 created "2016-06-24" @default.
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- W2023843957 date "2006-06-28" @default.
- W2023843957 modified "2023-10-18" @default.
- W2023843957 title "Spectroscopic Studies of Heteropoly Acid-doped 3M Perfluorinated Sulfonic Acid Polymer Membranes" @default.
- W2023843957 doi "https://doi.org/10.1149/1.2214496" @default.
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