کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5420983 1507517 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
NMR spectroscopy of hydrogen adsorption on single-walled carbon nanotubes after exposure to high pressure
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
NMR spectroscopy of hydrogen adsorption on single-walled carbon nanotubes after exposure to high pressure
چکیده انگلیسی
Hydrogen storage properties of single-walled carbon nanotubes (CNTs) after exposure to a pressure of 14.3 MPa are studied by 1H nuclear magnetic resonance spectroscopy. The nanotubes were carefully pre-characterized using inductively coupled plasma mass spectrometry (ICP-MS), transmission electron microscopy (TEM), and Raman spectroscopy. We have shown previously that at ambient temperature in the pressure range from 0 to 1.5 MPa, hydrogen adsorption is fast and reversible and must be described as physisorption. However, exposure to a much higher pressure (14.3 MPa) of hydrogen leads to slower desorption kinetics where longer exposure causes greater hydrogen uptake. Our data suggest that interstitial sites and the tube interior may be identified as these strong adsorption sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Nuclear Magnetic Resonance - Volume 29, Issues 1–3, February 2006, Pages 125-131
نویسندگان
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