کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7934711 | 1512940 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dehydrogenation and reaction pathway of Perovskite-Type NH4Ca(BH4)3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Perovskite-type borohydride, NH4Ca(BH4)3, is considered as a promising hydrogen storage material due to its high gravimetric hydrogen capacity (15.7â¯wt%). In this work, the dehydrogenation performance and reaction pathway of NH4Ca(BH4)3 have been systematically investigated. It is found that the initial decomposition temperature is only 65â¯Â°C, suggesting a low thermodynamic stability of NH4Ca(BH4)3. The desorption kinetics conducted by differential scanning calorimetry (DSC) indicates that the activation energy of decomposition is about 226.1â¯kJ/mol. The dehydrogenation pathway of NH4Ca(BH4)3 characterized by fourier-transform infrared spectroscopy (FTIR) and solid-state nuclear magnetic resonance (NMR) shows a stepwise decomposition process, in which the initial dehydrogenation is due to destabilization of H+ in NH4 and H- in BH4 followed by the subsequent dehydrogenation steps arising from the decomposition of homologous NH3BH3 and the final decomposition of Ca(BH4)2 at a high temperature, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Natural Science: Materials International - Volume 28, Issue 2, April 2018, Pages 194-199
Journal: Progress in Natural Science: Materials International - Volume 28, Issue 2, April 2018, Pages 194-199
نویسندگان
Chengguang Lang, Yi Jia, Jiangwen Liu, Hui Wang, Liuzhang Ouyang, Min Zhu, Xiangdong Yao,