Close analysis at the surface of Nafion samples revealed random spatial areas with significantly different XPS signals, an indication of surface micro-heterogeneity. Figure 4 shows...

Aug 28, 2018 · C1s signal present at ∼285.5 eV is most likely due to a surface layer of adventitious carbon present in nearly all samples analyzed via XPS. Both the F1s and S2p …

The correspondence between Nafion structure and bond energy in XPS is shown in Table S3 [32, 33]. The peak intensities of C–C, C–O–C, and C–F bonds in the irradiated Nafion membrane …

Jun 20, 2007 · To the authors’ knowledge, this is the first application of XPS to correlate surface analysis and degradation studies of Nafion ® membranes. The experimental results provide …

May 10, 2024 · This work explores the stability of Nafion during XPS measurements, illuminating and addressing Nafion degradation concerns. The extent of Nafion damage as a function of …

Two-dimensional XPS maps show discrete surface and bulk chemistry in Nafion membranes. The overall C1s elemental map of the cross section of an "As Purchased" 212 Nafion membrane is …

The binding energies of C1s signals are in the energy range of 292.2 eV for car-2:3 is expected, but a ratio of approximately 2.2:1 for the Nafion® membrane as received is determined by XPS.

Previous reports based on the combined XPS and mass spectroscopy experiments found that in ether electrolyte, a compact and ionically conductive SEI layer was existed which prevents the …

Jun 4, 2016 · In this work, we investigated the effect of charging of diamond on highly oriented pyrolytic graphite (HOPG) as well as adapalene (Figure S7a), which includes sp 3 C …

In the present work, membrane electrode assembly (MEA) degradation of a four-cell stack with Nafion membranes of different thicknesses, including N117, N115, NR212, and NR211, was …