کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1417620 985974 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrogen adsorption in different carbon nanostructures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Hydrogen adsorption in different carbon nanostructures
چکیده انگلیسی

Hydrogen adsorption in different carbonaceous materials with optimized structure was investigated at room temperature and 77 K. Activated carbon, amorphous carbon nanotubes, SWCNTs and porous carbon samples all show the same adsorption properties. The fast kinetics and complete reversibility of the process indicate that the interaction between hydrogen molecules and the carbon nanostructure is due to physisorption. At 77 K the adsorption isotherm of all samples can be explained with the Langmuir model, while at room temperature the storage capacity is a linear function of the pressure. The surface area and pore size of the carbon materials were characterized by N2 adsorption at 77 K and correlated to their hydrogen storage capacity. A linear relation between hydrogen uptake and specific surface area (SSA) is obtained for all samples independent of the nature of the carbon material. The best material with a SSA of 2560 m2/g shows a storage capacity of 4.5 wt% at 77 K.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 43, Issue 10, August 2005, Pages 2209–2214
نویسندگان
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