کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7746812 | 1498294 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The state of POnb non-bridging oxygen and proton incorporation in binary MO·P2O5 (M = Ca, Mg) phosphate glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Binary xMO·(100 â x)P2O5 (mol%; M = Ca, Mg) glasses were prepared using a conventional melting method, and the proton conduction mechanism in the glasses was investigated. The proton conductivities of the glasses were measured under various hydrogen (H2) gas concentrations from 0 to 100 vol.% using Pt electrodes. The CaO·P2O5 glasses show higher proton conductivities than MgO·P2O5 ones. Fourier-transform infrared (FTIR) measurements showed that protons dissociated from H2 gas at the Pt electrodes are incorporated into the glasses, and the proton conductivity increases as a result of an increase in the carrier (proton) concentration. There is a good linear relationship between the peak wavenumber of POnb (Onb indicates non-bridging oxygen) and the proton conductivity measured in a 100 vol.% H2 atmosphere. Furthermore synchrotron radiation X-ray diffraction (SRXRD) and FTIR results suggest that the Ï-electron of PO double bond is localized significantly in MgO·P2O5 compared with CaO·P2O5 glasses, which is the origin of higher proton conductivity in CaO·P2O5 glasses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volumes 245â246, 1 September 2013, Pages 19-23
Journal: Solid State Ionics - Volumes 245â246, 1 September 2013, Pages 19-23
نویسندگان
Yawara Takamatsu, Yusuke Daiko, Shinji Kohara, Kentaro Suzuya, Atsushi Mineshige, Tetsuo Yazawa,