Topic
Nafion
About: Nafion is a research topic. Over the lifetime, 9110 publications have been published within this topic receiving 320865 citations.
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TL;DR: In this paper, a polyvinyl alcohol/chitosan, PCS, blended membrane is prepared by direct blend process and solution casting method, in order to reduce the swelling ratio and enhance the chemical and thermal stabilities of the PCS.
112 citations
TL;DR: In this article, polystyrene sulfonic acid (PSSA) pore-filled poly(vinylidene fluoride) (PVDF) membranes have been prepared using simultaneous electron irradiation method.
112 citations
TL;DR: In this article, the infrared spectra of Nafion membranes in twenty different cationic forms were studied in order to characterize the water-anion-cation interactions at low water contents.
Abstract: We have studied the infrared spectra of Nafion membranes in twenty different cationic forms, in order to characterize the water–anion–cation interactions at low water contents. Spectra in the OH st...
112 citations
TL;DR: The concentrations of fixed ion in Nafion® membranes have been calculated based on both the homogeneous model and the ion cluster model while the concentrations of co-ion were calculated from the Donnan expression as mentioned in this paper.
Abstract: The concentrations of fixed ion in Nafion® membranes have been calculated based on both the homogeneous model and the ion cluster model while the concentrations of co‐ion were calculated from the Donnan expression. The experimental results on the concentrations of co‐ion reveal that the ions in this material do form clusters and the membrane also exhibits a strong Donnan exclusion effect. The ionic mobilities obtained from the conductivity and diffusivity studies are in fairly good agreement. Strong acidity coupled with high proton mobility in this membrane provide an important solid polymer electrolyte for a variety of electrochemical applications. The impact of polymer morphology on cell performance is also discussed.
111 citations
TL;DR: Electrochemical tests show that rates of hydrogen oxidation and oxygen reduction by platinum nanoparticles supported on Ti(0.7)W( 0.3)O2 are comparable to those of commercial Pt on carbon black.
Abstract: The materials currently used in proton-exchange membrane fuel cells (PEMFCs) require complex control of operating conditions to make them sufficiently durable to permit commercial deployment. One of the major materials challenges to allow simplification of fuel cell operating strategies is the discovery of catalyst supports that are much more stable to oxidative decomposition than currently used carbon blacks. Here we report the synthesis and characterization of Ti0.7W0.3O2 nanoparticles (approximately 50 nm diameter), a promising doped metal oxide that is a candidate for such a durable catalyst support. The synthesized nanoparticles were platinized, characterized by electrochemical testing, and evaluated for stability under PEMFC and other oxidizing acidic conditions. Ti0.7W0.3O2 nanoparticles show no evidence of decomposition when heated in a Nafion solution for 3 weeks at 80 °C. In contrast, when heated in sulfuric, nitric, perchloric, or hydrochloric acid, the oxide reacts to form salts such as titany...
111 citations