Study of self-diffusion of alkali metal cations inside a Nafion membrane

Citation
Al. Rollet et al., Study of self-diffusion of alkali metal cations inside a Nafion membrane, PCCP PHYS C, 2(5), 2000, pp. 1029-1034
Citations number
24
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN journal
14639076 → ACNP
Volume
2
Issue
5
Year of publication
2000
Pages
1029 - 1034
Database
ISI
SICI code
1463-9076(2000)2:5<1029:SOSOAM>2.0.ZU;2-W
Abstract
A novel radiotracer method, based on the rotating electrode technique used in electrochemistry, was used for the study of the self-diffusion propertie s of ions in ion-exchange membranes; the self-diffusion coefficients of Na and Cs+ ions were determined in a Nafion 117 membrane. The influence of el ectrolyte concentration and temperature was investigated and an important i nfluence of the former was observed. The results indicate that the diffusio n process inside the membrane for Na+ ion depends linearly on the water vol ume fraction. The results for Cs+ may be a sign of stronger interactions th an for Na+ ions with the membrane.