Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
J Am Chem Soc. 2011 Jul 27;133(29):11034-7. doi: 10.1021/ja2027772. Epub 2011 Jul 1.
We report the first example of nanosize-induced hydrogen storage in a metal that does not absorb hydrogen in its bulk form. Rhodium particles with diameters of <10 nm were found to exhibit hydrogen-storage capability, while bulk Rh does not absorb hydrogen. Hydrogen storage was confirmed by in situ powder X-ray diffraction, solid-state (2)H NMR, and hydrogen pressure-composition isotherm measurements. The hydrogen absorption capacity could be tuned by controlling the particle size.
我们报道了首例纳米尺寸诱导的储氢现象，即在块状形式下不吸收氢的金属中实现了纳米尺寸诱导的储氢。我们发现，直径小于 10nm 的铑粒子具有储氢能力，而块状 Rh 则不吸收氢。通过原位粉末 X 射线衍射、固态 (2)H NMR 和氢压-组成等温线测量证实了储氢的存在。通过控制颗粒尺寸可以调节氢的吸收能力。
