کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8961297 1646478 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
First-principles hydrogen adsorption properties of Li-decorated ThMoB4-type graphene
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
First-principles hydrogen adsorption properties of Li-decorated ThMoB4-type graphene
چکیده انگلیسی
The hydrogen storage (1-10H2) properties of single- and double-side lithium decorated ThMoB4-type graphene (Li/ThMoB4C) are systematically investigated by density functional first-principles calculations within Dmol3 package. After well-converged geometry optimizations, it is found that the binding energy of Li adatom is higher enough, and there is no adatom clustering. The average adsorption energies of 1-6 H2 deviate in 0.20-0.27 eV/H2 range, which is providing a convenient physical adsorption-desorption cycle. A detailed examination of the binding mechanism between the constituents of the H2 adsorbed Li-decorated systems is presented by density of states, Mulliken charge analysis, electron density and density difference calculations. For further decoration and adsorption with 12Li adatom and 72H2 molecules, the computation yields a high gravimetric density of 14.5 wt % with the acceptable adsorption energy. In this way, it is concluded that Li/ThMoB4 system can be considered as a promising hydrogen storage medium.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 33, 16 August 2018, Pages 16117-16127
نویسندگان
, , ,