†Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart, Germany.
‡Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, Stuttgart, Germany.
Nano Lett. 2015 Jun 10;15(6):4170-5. doi: 10.1021/acs.nanolett.5b01320. Epub 2015 May 20.
A "job-sharing" hydrogen storage mechanism is proposed and experimentally investigated in Ru/Li2O nanocomposites in which H(+) is accommodated on the Li2O side, while H(-) or e(-) is stored on the side of Ru. Thermal desorption-mass spectroscopy results show that after loading with D2, Ru/Li2O exhibits an extra desorption peak, which is in contrast to Ru nanoparticles or ball-milled Li2O alone, indicating a synergistic hydrogen storage effect due to the presence of both phases. By varying the ratio of the two phases, it is shown that the effect increases monotonically with the area of the heterojunctions, indicating interface related hydrogen storage. X-ray diffraction, Fourier transform infrared spectroscopy, and nuclear magnetic resonance results show that a weak LiO···D bond is formed after loading in Ru/Li2O nanocomposites with D2. The storage-pressure curve seems to favor H(+)/H(-) over H(+)/e(-) mechanism.
提出并实验研究了 Ru/Li2O 纳米复合材料中的“工作共享”储氢机制，其中 H(+) 容纳在 Li2O 侧，而 H(-) 或 e(-) 储存在 Ru 侧。热脱附-质谱结果表明，在负载 D2 后，Ru/Li2O 表现出额外的脱附峰，与 Ru 纳米颗粒或单独球磨的 Li2O 形成对比，表明由于存在两种相，存在协同储氢效应。通过改变两相的比例，表明该效应随着异质结面积的增加单调增加，表明与界面相关的储氢。X 射线衍射、傅里叶变换红外光谱和核磁共振结果表明，在 Ru/Li2O 纳米复合材料中用 D2 负载后形成了弱的 LiO···D 键。储氢压力曲线似乎有利于 H(+)/H(-)而不是 H(+)/e(-)机制。
