A Molecular Dynamic Simulation of Hydrated Proton Transfer in Perfluorosulfonate Ionomer Membranes (Nafion 117)
نویسندگان
چکیده
منابع مشابه
State of Water in Perfluorosulfonic Ionomer (Nafion 117) Proton Exchange Membranes
State of Water in Perfluorosulfonic Ionomer (Nafion 117) Proton Exchange Membranes Zijie Lu,* Georgios Polizos, Digby D. Macdonald,** and E. Manias Polymer Nanostructures Laboratory, Center for the Study of Polymeric Systems, and Center for Electrochemical Science and Technology, Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802,...
متن کاملState of Water in Perfluorosulfonic Ionomer (Nafion) Proton Exchange Membranes
This manuscript reports on the direct identification of four states of water in hydrated Nafion ionomer polymers, including a quantitative measurement of their dynamics, as previously published in the Journal of the Electrochemical Society, 155, B163-B171 (2008). Here, we provide further details on the dynamics of these water states and we underline still-open scientific questions, towards stim...
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The dynamics of water and its effect on proton transport kinetics in Nafion membranes are compared at several hydration levels. Nafion is the most widely used polyelectrolyte membrane in fuel cells. Ultrafast infrared spectroscopy of the O-D stretch of dilute HOD in H2O provides a probe of the local environment and hydrogen bond network dynamics of water confined in the hydrophilic regions of N...
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The dynamics and the nature of water environments in a fuel cell proton exchange membrane are studied experimentally. Specifically, the dynamics of water in Nafion 117 membranes, in the acid form, were investigated at two hydration levels and several temperatures by means of dielectric relaxation spectroscopy; two different dielectric spectroscopy experimental setups were employed for low (10-1...
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Proton transfer in protonated Nafion fuel cell membranes is studied using several pyrene derivative photoacids. Proton transfer in the center of the Nafion nanoscopic water channels is probed with the highly charged photoacid 8-hydroxypyrene-1,3,6-trisulfonate (HPTS). At high hydration levels, both the time-integrated fluorescence spectrum and the fluorescence kinetics of HPTS permit the determ...
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ژورنال
عنوان ژورنال: Journal of Chemistry
سال: 2015
ISSN: 2090-9063,2090-9071
DOI: 10.1155/2015/169680