کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5447246 | 1511496 | 2017 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ammonia borane with polyvinylpyrrolidone as a hydrogen storage material: Comparison of different molecular weights
ترجمه فارسی عنوان
بورن آمونیاک با پلی وینیل پریرولیدون به عنوان ماده ذخیره سازی هیدروژن: مقایسه وزنهای مولکولی مختلف
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
We report thermal and infrared transmission measurements on ammonia borane (NH3BH3, AB), and its bulk composites with polyvinylpyrrolidone (PVP) as a function of temperature. X-ray studies reveal an amorphous phase combined the AB crystalline with the addition of the polymer. We determine the activation energies in the temperature range from 25 °C to 300 °C with various ramp rates via kinetic studies. These activation energies of AB:PVP bulk composites were found to be lower than the pristine AB. Overall, the composites with higher molecular weight and high polymer content revealed the greatest decrease in Ea. The weight loss provided similar results, it decreased from â¼57.8% for AB to â¼10.5% for the polymer composite. The FT-IR studies of AB and the bulk composites showed evidence of the interaction between the boron atom of AB and the oxygen atom of the carbonyl group in PVP. An explanation of the hydrogen release pattern during decomposition at higher temperatures ranging from 25 °C to 300 °C is also provided.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 110, November 2017, Pages 394-400
Journal: Journal of Physics and Chemistry of Solids - Volume 110, November 2017, Pages 394-400
نویسندگان
Ramanjaneyulu Seemaladinne, Sahithya Pati, Krishna Kharel, Adarsh Bafana, Amal al-Wahish, Evan K. Wujcik, Ãzge Günaydın-Åen,