کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1280230 1497681 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrogen storage by KOH-modified multi-walled carbon nanotubes
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Hydrogen storage by KOH-modified multi-walled carbon nanotubes
چکیده انگلیسی

Potassium hydroxide (KOH) was employed to modify multi-walled carbon nanotubes (MWNTs), which were annealed at high temperatures to evaluate the properties of hydrogen storage in this study. Experimental results revealed that the structure of carbon nanotubes (CNTs) became destructive after being activated by KOH at 823K in H2H2 atmosphere. It was also found that the capacity of hydrogen storage onto the unmodified and KOH modified CNTs were 0.71 and 4.47wt%, respectively, under ambient pressure and at moderate temperature. In addition to alkali–metal, both the residual metal such as cobalt and the defect structure were also considered as important keys to be used to improve hydrogen adsorption in the CNTs. The cause of which suggested that residual metal such as cobalt may be acting to dissociate hydrogen molecule into its atom state to spread out to the surface and inner layer through defect sites of the CNTs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 32, Issue 2, February 2007, Pages 237–246
نویسندگان
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