+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Local probe and conduction distribution of proton exchange membranes

Local probe and conduction distribution of proton exchange membranes

Journal of Physical Chemistry. B 111(22): 6134-6140

Proton exchange membranes (Nafion) have been studied using current sensing atomic force microscopy to examine the correlation between the surface morphology and the ionic domains, and to probe the local ionic conduction distribution in the membranes. It is found that the local ionic conduction generated from the current sensing images follows a Gaussian-like distribution, with the peak value and the width of the distribution increasing with the relative humidity in the sample chamber and, thus, the water content in the membranes. Two types of Nafion membranes, Nafion 112 and Nafion 117, were studied using the method. The implications of the distribution in relation to the ionic conducting channels in the membranes are discussed.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 054152217

Download citation: RISBibTeXText

PMID: 17503803

DOI: 10.1021/jp0706230

Related references

Proton conduction in exchange membranes across multiple length scales. Accounts of Chemical Research 45(11): 2002-2010, 2012

Investigation of Humidity Dependent Surface Morphology and Proton Conduction in Multi-Acid Side Chain Membranes by Conductive Probe Atomic Force Microscopy. Journal of Physical Chemistry. B 119(44): 14280-7, 2015

Stereochemistry-Dependent Proton Conduction in Proton Exchange Membrane Fuel Cells. Langmuir 32(1): 359-365, 2016

Ultrafast proton/deuteron dynamics in KTaO 3 observed with infrared pump-probe spectroscopy: Toward understanding of proton conduction mechanism in solid oxides. Journal of Chemical Physics 149(10): 104502, 2018

NMR detection of pH-dependent histidine-water proton exchange reveals the conduction mechanism of a transmembrane proton channel. Journal of the American Chemical Society 134(8): 3703-3713, 2012

High performance proton exchange membranes obtained by adjusting the distribution and content of sulfonic acid side groups. Chemical Communications 49(38): 3979-3981, 2013

The influenza m2 cytoplasmic tail changes the proton-exchange equilibria and the backbone conformation of the transmembrane histidine residue to facilitate proton conduction. Journal of the American Chemical Society 137(18): 6067-6077, 2015

Proton nmr study of labile proton exchange in the heme cavity as a probe for the potential ligand entry channel in myoglobin. Biochemistry 24(25): 7388-7395, 1985

Hydrogen bonds with large proton polarizability in films of (l-his)n and (l-lys)n with a model molecule of the head group of phosphatidylserine: proton conduction in polar surfaces of biological membranes. Journal of Molecular Structure 221: 175-188, 1990

Effect of hydrogen deuterium exchange on energy coupled processes in thylakoids a new illustration of the hypothesis of local proton gradients with the energy transducing bio membranes. Febs Letters 139(2): 245-249, 1982

Local structure and hydrogen bond characteristics of imidazole molecules for proton conduction in acid and base proton-conducting composite materials. Physical Chemistry Chemical Physics 20(15): 10311-10318, 2018

Sodium proton and lithium proton exchange by rabbit jejunal brush border membranes. Federation Proceedings: Abstract 7153, 1982

Perfluoroalkyl phosphonic and phosphinic acids as proton conductors for anhydrous proton-exchange membranes. Chemphyschem 11(13): 2871-2878, 2010

Advances in proton-exchange membranes for fuel cells: an overview on proton conductive channels (PCCs). Physical Chemistry Chemical Physics 15(14): 4870-4887, 2013

Proton mobilities in phosphonic acid-based proton exchange membranes probed by 1H and 2H solid-state NMR spectroscopy. Journal of Physical Chemistry. B 113(19): 6674-6681, 2009