Results 21 to 30 of about 2,534,122 (299)
Química Nova, 2016 Organic/inorganic membranes based on sulfonated poly(vinyl alcohol) (SPVA) and in situ prepared TiO2 nanoparticles nanocomposite membranes with various compositions were prepared to use as proton exchange membranes in direct membrane fuel cells.
Jignasa N. Solanki +2 more
doaj +1 more source
Composite membranes for proton exchange membrane fuel cells based on methyl methacrylate-co-maleimide /phosphotungstic acid [PDF]
شیمی کاربردی روز, 2018 Poly(methyl methacrylate-co-nitrophenyl maleimide) (MMA-co-NMI) and poly(methyl methacrylate-co-hydroxyphenyl maleimide) (MMA-co-HMI) copolymers were synthesized using free radical polymerization of MMA with a new MI monomer containing phenyl ...
zahra seidzadeh +3 more
doaj +1 more source
Journal of Ionic Liquids, 2023 Series of proton conductive membranes were prepared by mixing different weight ratio of 3-hexyl-1-methylimidazolium hydrogensulfite ([C6C1Imi][HSO3]), and N-hexyl-pyridinium hydrogensulfite ([C6Py][HSO3]) ionic liquids with poly vinyl alcohol (PVA ...
Hasna Wakrim +7 more
doaj +1 more source
Crystals, 2022 The sol-gel technique was adopted to synthesize the zinc oxide (ZnO) nanoparticles. Nano-sized ZnO particles are embedded in-situ to the poly(vinyl alcohol) (PVA) matrix to form the nanocomposite polymeric membranes.
Ahmed Al Otaibi +8 more
doaj +1 more source
Ionic conductivity of an extruded Nafion 1100 EW series of membranes [PDF]
, 2002 The proton conductivity of a series of extruded Nafion membranes @of equivalent weight ~EW! of 1100 and nominal dry thickness of 51, 89, 127, and 178 mm# has been studied. Measurements were made in 1 M H2SO4 at 298 K using a four-electrode, dc technique.
Ralph, T.R. +3 more
core +1 more source
Composite sPEEK with Nanoparticles for Fuel Cell's Applications: Review [PDF]
, 2012 The membranes in fuel cells must both conduct protons and serve as a barrier for fuel. This review discusses modifications nanoparticles of sPEEK (sulfonated polyether-ether ketone), sPEEK have advantages properties as fuel cell’s membranes such as ...
Arief , Rahman Hakim +3 more
core +1 more source
Surface-coupled proton exchange of a membrane-bound proton acceptor [PDF]
Proceedings of the National Academy of Sciences, 2010 Proton-transfer reactions across and at the surface of biological membranes are central for maintaining the transmembrane proton electrochemical gradients involved in cellular energy conversion. In this study, fluorescence correlation spectroscopy was used to measure the local protonation and deprotonation rates of single pH ...
Sandén, Tor +3 more
openaire +3 more sources
Current Density Performances in Poly Ether Ether Keton Membrane for Direct Methanol Fuel Cells [PDF]
, 2012 The objective of this study focuses on the characterization of poly ether ether ketone (PEEK) membranes for direct methanol fuel cells (DMFC) application. The PEEK membrane was modified with sulfonation in NMP solvent.
E. L. , Dewi +5 more
core +1 more source
Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells [PDF]
, 2019 The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g-1), counterion (H+or Na+), membrane ...
Göran, Lindbergh +5 more
core +2 more sources
Membranes, 2023 Composite chitosan/phosphotungstic acid (CS/PTA) with the addition of TiO2 and Al2O3 particles were synthesized to be used as proton exchange membranes in direct methanol fuel cells (DMFCs). The influence of fillers was assessed through X-ray diffraction,
Andrea Zaffora +6 more
doaj +1 more source