کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1275581 | 1497536 | 2013 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Theoretical investigation of molecular hydrogen adsorption and dissociation on AlnV(n = 1–13) clusters Theoretical investigation of molecular hydrogen adsorption and dissociation on AlnV(n = 1–13) clusters](/preview/png/1275581.png)
We present density functional calculations of H2 adsorption and dissociation on small-sized AlnV clusters for n = 1–13. The growth pattern for AlnV (n = 2–4, 8, 10–12) clusters is V atom occupying a peripheral position of Aln clusters. And the growth pattern for AlnV (n = 6, 9, and 13) clusters is V-substituted Aln+1 clusters. It is found that the V atom substituted the surface atom of Aln+1 cluster and occupies a peripheral position. H2 is easily physically absorbed on the top V atom of AlnV (n = 1–13) clusters with a side-on orientation rather than an end-on orientation because of the more effective orbital overlap in the side-on orientation. The reaction of AlnV with H2 would produce AlnVH2 because of large exothermic energy changes and relatively small activation energies especially for AlV and Al7V, which might serve as highly efficient and low-cost catalysts for hydrogen dissociation.
► Growth behavior of AlnV and adsorption of hydrogen on AlnV have been studied.
► H2 is physically absorbed on the top V atom of AlnV with a side-on orientation.
► AlnV with H2 produce AlnVH2 by exothermic energy and small activation energies.
► AlV and Al7V might serve as catalysts for hydrogen dissociation.
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 9, 27 March 2013, Pages 3640–3649