Environmentally Controlled Infrared Spectroscopy System for Fundamental Studies of Polymer Electrolyte Membranes
Technical Report,07 Jul 2014,06 Jul 2015
Northeastern University Boston United States
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Dehydration studies of ionomer Nafion and SPEEK membranes were accomplished using a high pressure high temperature infrared cell.Categorization of ionomer exchange site normal modes by exchange site local symmetry enabled correlation of the exchange site structure tostate-of-hydration. Polarization modulated infrared reflection-absorption spectroscopy experiments are enabled by the use of a spin-coater tocoat SiO2 and Pt surfaces with ionomer solutions. PM-IRRAS allows for the determination of what ionomer functional groups are orderedby the Pt surface and are involved in adsorption. Also, the ionomer membranes are being used in a specialized reaction system, where olefinsare isomerized and analyzed using a gas chromatograph-mass spectrometer. By varying the reaction cell potential, the catalyst acidity can betuned.
- Atomic and Molecular Physics and Spectroscopy
- Polymer Chemistry