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Water and methanol transport in Nafion membranes with different cationic forms 1. Alkali monovalent cations

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Godino Gómez, María Paz and Barragán García, Vicenta María and García Villaluenga, Juan Pedro and Ruiz Bauzá, Carlos and Seoane Rodríguez, Benjamín (2006) Water and methanol transport in Nafion membranes with different cationic forms 1. Alkali monovalent cations. Journal of Power Sources, 160 (1). pp. 181-186. ISSN 0378-7753

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Official URL: http://dx.doi.org/doi:10.1016/j.jpowsour.2006.02.006


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Abstract

The mass flux originated when two methanol-water solutions of different methanol concentration are separated by a Nation 117 membrane in acid (H+) and different alkali metal forms (Li+, Na+, K+, Rb+, Cs+) have been measured, as a function of the methanol concentration difference. From the experimental results, the methanol and water permeabilities have been estimated for the different forms of the membrane. The results show that the cationic form of the membrane strongly influences on the methanol and water permeabilities with respect to the values corresponding to its acid form. Moreover, this influence is different for water and methanol depending on the substituted cation. This strong influence of the cationic form of the membrane on the methanol and water permeabilities could be important in relation to the development of new membranes to decrease the methanol crossover in direct methanol fuel cells.


Item Type:Article
Additional Information:

© 2006 Elsevier B.V. Financial support from the University Complutense of
Madrid under Project 052PR13273 is gratefully acknowledged.

Uncontrolled Keywords:Fuel-cell; Exchange membranes; Diffusion-coefficient; Self-diffusion; Crossover; Proton; Ion; Performance; Behavior; Sorption.
Subjects:Sciences > Physics > Thermodynamics
ID Code:20648
Deposited On:08 Apr 2013 10:10
Last Modified:11 Mar 2016 14:34

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