کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5351155 | 1503649 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced room-temperature hydrogen storage in super-activated carbons: The role of porosity development by activation
ترجمه فارسی عنوان
ذخیره سازی هیدروژن در دمای اتاق افزایش یافته در کربن های فوق فعال: نقش توسعه تخلخل بوسیله فعال سازی
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کلمات کلیدی
ذخیره سازی هیدروژن، کربن سوپر فعال قطر بینی، دمای اتاق،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Efficient hydrogen storage with a high density under near-ambient temperature remains a key technical obstacle for a hydrogen economy. Here we demonstrate the enhanced room-temperature hydrogen storage in super-activated carbon materials, which were prepared by carbon dioxide activation of templated porous carbons. These carbon materials possess high specific surface areas of up to 2829Â m2/g, large pore volumes of up to 2.34Â cm3/g, and hierarchical pore structures consisting of primary micropores with median size in the range of 0.7-1.3Â nm and secondary mesopores with the size of 2-4Â nm. One of the super-activated carbons exhibits a high hydrogen uptake of 0.95Â wt% at 298Â K and 80Â bar, which is among the highest data reported for the porous carbon materials at room temperature and moderate pressure. The role of porosity development caused by activation in improving the hydrogen storage properties of the carbon materials has been investigated. A close relationship between hydrogen storage capacities and micropore volumes has been found. The microporosity development, especially the rapid increase of narrow pores with the diameters around 1.2Â nm, appears to be essential for the enhanced room-temperature hydrogen storage in the super-activated carbons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 315, 1 October 2014, Pages 261-267
Journal: Applied Surface Science - Volume 315, 1 October 2014, Pages 261-267
نویسندگان
Kaisheng Xia, Juan Hu, Jinhua Jiang,