We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Cost-Effective Hierarchical Catalysts for Promoting Hydrogen Release from Complex Hydrides.
- Authors
Yang, ChENg ‐ HsiEN; Hsu, Chih ‐ Ping; Lee, ShENg ‐ Long; Wang, Kuan ‐ WEN; Chang, JENg ‐ Kuei
- Abstract
Fe nanoparticles (∼10 nm), used to grow carbon nanotubes (CNTs), have an outstanding ability to catalyze the dehydrogenation of LiAlH4. The CNTs help connect Fe and LiAlH4 and create microchannels among the composite, thus promoting the release of hydrogen. Inspired by these results, a supercritical-CO2-fluid-assisted deposition technique is employed to decorate the Fe/CNTs with highly dispersed nanosized Ni (∼2 nm in diameter) for better performance. With the incorporation of 10 wt % of this hierarchical catalyst (Ni/Fe/CNTs), the initial dehydrogenation temperature of LiAlH4 is decreased from ∼135 to ∼40 °C. At 100 °C, this catalyzed LiAlH4 takes only ∼0.1 h to release 4.5 wt % hydrogen, which is more than 100 times faster than the time needed with pristine LiAlH4. The dehydrogenation mechanism of the complex hydride is examined using in situ synchrotron X-ray diffraction.
- Subjects
CATALYSTS; HYDROGEN; DEHYDROGENATION; HYDRIDES; NANOPARTICLES
- Publication
ChemSusChem, 2015, Vol 8, Issue 16, p2713
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201500413