کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1297881 | 1498365 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of proton diffusion in Nafion®117 membrane by electrical conductivity and NMR
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Investigation of proton diffusion in Nafion®117 membrane by electrical conductivity and NMR Investigation of proton diffusion in Nafion®117 membrane by electrical conductivity and NMR](/preview/png/1297881.png)
چکیده انگلیسی
The proton dynamics in Nafion ®117 is investigated by comparison of the diffusion coefficient DNMR estimated from PFG-NMR with that of Dσ estimated from electrical conductivity. At high water content region, Dσ is about two times higher than DNMR as a result of Grotthuss mechanism. At low water content region, Dσ and DNMR are in good agreement with each other. Both of the diffusion coefficients decrease steeply at low water content region. It can be explained as a result of the percolation transition due to the isolation of ion clusters, which is suggested by the recent small angle X-ray scattering data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 180, Issues 6–8, 14 May 2009, Pages 580–584
Journal: Solid State Ionics - Volume 180, Issues 6–8, 14 May 2009, Pages 580–584
نویسندگان
Shimon Ochi, Osamu Kamishima, Junichiro Mizusaki, Junichi Kawamura,