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Diffusion in Nafion

With the exception of Elder et. al., who used EXAFS to look at redox properties of copper complexes diffused in Nafion film modified electrodes (21), no in-situ studies have been reported on modified electrodes using EXAFS. [Pg.218]

Ochi S, Kamishima O, MizusaM J, Kawamura J (2009) Investigation of proton diffusion in Nafion 117 membrane by electrical conductivity and NMR. Solid State Ion 180 580-584... [Pg.220]

CT by reduction of a macrocyclic complex, tetraphenylporphyrin cobalt(lll) ([Co TP ]" ), in a Nafion film was investigated using a PSCAS [38]. The CT mechanism was found to be a physical displacement of [Co TTP]" with kp = 6.2 X 10 s . It was surprising to see CT by such a large and hydrophobic molecule taking place by physical diffusion in Nafion. The reduced species of hydrophobic [Co TPP] had been considered to be unfavorable for diffusion in the hydrophihc ion channel of Nafion. The physical displacement mechanism would suggest that the complexes ([Co TPP]" and [Co TPP]) diffuse in the interfacial region between hydrophobic polyfluorocarbon clusters and the hydrophilic ion channel. [Pg.153]

Yeager HL, Steck A. Cation and water diffusion in Nafion ion-exchange membranes—influence of polymer stmcture. J Electrochem Soc 1981 128(9) 1880-4. [Pg.32]

H. L. Yeager and A. Steck, Cation and water diffusion in nafion ion... [Pg.297]

In the FA model, an elementary conversion unit is a spherical cluster of carbon support immersed in Nafion. The cluster may or may not be covered by a thin electrolyte film. In any case, to reach the catalyst surface an oxygen molecule must dissolve and diffuse in Nafion. Since oxygen... [Pg.80]

Diffusion in Nafion Diffusion into Nation (and other perfl uorosulfonic acid-based membranes) can be modeled according to Pick s law ... [Pg.311]


See other pages where Diffusion in Nafion is mentioned: [Pg.175]    [Pg.193]    [Pg.495]    [Pg.45]    [Pg.55]    [Pg.56]    [Pg.358]    [Pg.33]    [Pg.149]    [Pg.149]    [Pg.172]    [Pg.174]    [Pg.1503]    [Pg.16]   
See also in sourсe #XX -- [ Pg.42 , Pg.43 , Pg.44 , Pg.45 , Pg.46 , Pg.47 , Pg.48 , Pg.49 , Pg.50 , Pg.51 , Pg.52 , Pg.53 , Pg.54 , Pg.55 , Pg.56 ]




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Diffusion coefficients in Nafion

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