کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1298903 | 1498394 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of proton-conductive SiO2–H3PW12O40 composites prepared by mechanochemical treatment
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Dodecatungstophosphoric acid (H3PW12O40·nH2O) and SiO2 were mechanically milled, and a new class of proton-conductive composites was prepared. The conductivity of WPA–SiO2 composite with P/Si = 0.1 was 3 × 10− 3 S cm− 1 at 30 °C and 60% relative humidity (RH), which was higher than that (6 × 10− 4 S cm− 1) of the corresponding mixture before milling. In the medium temperature range, the WPA–SiO2 composite retained relatively high conductivity of 1 × 10− 4 S cm− 1 at 100 °C and 2% RH, which was higher by one order of magnitude than that of the mixture without milling. These higher values of conductivity for the milled composite can be ascribed to the presence of mechanochemically formed surface defects such as Si–OH and P–OH groups.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 178, Issues 7–10, April 2007, Pages 709–712
Journal: Solid State Ionics - Volume 178, Issues 7–10, April 2007, Pages 709–712
نویسندگان
Atsunori Matsuda, Yusuke Daiko, Tomohiko Ishida, Kiyoharu Tadanaga, Masahiro Tatsumisago,