| Literature DB >> 25915434 |
Lijun Fu1, Kun Tang1, Hyunchul Oh2, Kandavel Manickam2, Thomas Bräuniger1, C Vinod Chandran1, Alexander Menzel3, Michael Hirscher2, Dominik Samuelis1, Joachim Maier1.
Abstract
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.Entities:
Keywords: Hydrogen storage mechanism; Li2O; interfacial storage; ruthenium
Year: 2015 PMID： 25915434 DOI： 10.1021/acs.nanolett.5b01320
Source DB: PubMed Journal: Nano Lett ISSN： 1530-6984 Impact factor: 11.189