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Communication
Phys. Chem. Chem. Phys., 2009, 11, 255 - 258, DOI: 10.1039/b815924f
Improved hydrogen storage properties of a V decorated Mg nanoblade array
Yuping He and Yiping Zhao
An ultra-thin layer of V has been coated onto the surface of individual Mg nanoblades by dynamic shadowing growth. This 2.25 at% V decorated Mg nanoblade array can absorb and desorb hydrogen rapidly at temperatures T
500 K after activation by one hydrogen cycle, with a low hydrogen absorption activation energy of 35.0 ± 1.2 kJ per mol H2 and a desorption activation energy of 65.0 ± 0.3 kJ per mol H2. The improved hydrogen sorption kinetics is attributed to both the catalytic effect of the V coating and the unique nanoblade morphology with a large surface area and small hydrogen diffusion length.
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