Renewable Energy, Vol.91, 75-82, 2016
Investigation of SPES as PEM for hydrogen production through electrochemical reforming of aqueous methanol
A polymer electrolyte membrane for hydrogen production through methanol electrolysis was prepared by converting poly ether sulfone (PES) into ionomer via sulfonation and fashioned into membrane. The physical and electrochemical properties of the prepared membrane and a single cell using the fabricated membrane are examined using various characterization techniques, such as, FTIR spectrometry, scanning electron microscopy, thermogravimetric analysis, tensile strength measurement, ion exchange capacity, electrochemical impedance spectroscopy and polarization studies. A current density of 0.802 A/cm(2) was obtained at a cell voltage of 1.2 V at 80 degrees C with the sulfonated polyethersulfone (SPES) based membrane electrode assembly (MEA) under suitable fabrication conditions. The energy requirements for hydrogen production are also compared with conventional water electrolysis. The observational results suggest that SPES membrane could be an option to costly perfluorosulfonate membranes in methanol electrolysis for hydrogen production. (C) 2016 Elsevier Ltd. All rights reserved.